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MCP servers › ai.zerowidth › napkin

MCP server · registry snapshot 2026-10-23 · last tested 2026-10-23

ai.zerowidth/napkin

Draw boards, write docs and sheets, and build decks with your brand in Napkin. — the publisher's description

1 of 2 record checks metRead-only · tools listed 2026-10-23Topic: productivity-and-docs · AI-classifiedPricing: freemium · AI-classifiedversion 1.0.0streamable HTTP68 tools

Summary

ai.zerowidth/napkin is a remote MCP server listed in the official MCP registry at version 1.0.0. On 2026-10-23 ProtocolProbe connected to it in read-only mode and read its inventory: 68 tools, 134 resources and 0 prompts.

Record checks

1 of 2 record checks met · 7 do not apply

  • met: Registry entry is active and says how to run it
  • not met: Source repository link opens
  • not applicable: Repository is not archived
  • not applicable: Code pushed to the repository in the 90 days before our check
  • not applicable: Repository publishes a security policy (SECURITY.md)
  • not applicable: Package names its licence with a standard (SPDX) identifier
  • not applicable: The version the registry lists can be installed and is not withdrawn
  • not applicable: npm package carries build provenance (attestation)
  • not applicable: No known critical or high advisory in the package or its dependencies
  • Not ranked by downloads: a remote server publishes no download figure
  • Not ranked by stars: no public GitHub repository

From public records, not a safety rating. Each check with its reason · Is it safe to install?

Key facts

Runs
remote (hosted by the publisher)
Transport
streamable HTTP
Sign-in
none needed to open a session
Tools
68
Described as changing data
37 of 68 toolsAI-classified
Mainly works on
files and code on the machine it runs onAI-classified
Topic
productivity-and-docsAI-classified
Pricing
freemiumAI-classified
Last tested
2026-10-23

Add to your client

Observed fact

This server accepted a session without any credential and lists 33 tools whose name or declaration suggests they change data (comments_create, comments_resolve, napkin_boards_update, napkin_boards_create, napkin_deck_write and 28 more). That is our reading of the names; we did not call them. Source: our connection, 2026-10-23.

Worth knowing before you connect it

  • 37 tools are described as changing something (comments_create, comments_resolve, napkin_boards_update, …): our AI model's reading of the descriptions, not something we tested, and the server opened a session without any credential. We did not call them.

Each line comes from a section below, with its source and date.

How fresh this is

Live-tested
yes, a real session (not a text-only review)
Last tested
2026-10-23
Mode
read-only (no tool calls)
Latest version
1.0.0, published 2026-10-07 (registry, as of the 2026-10-23 snapshot)
First listed version
2026-10-07 (earliest version still in the registry; older removed versions would be earlier)
Registry data
snapshot 2026-10-23
Package and repository
checked 2026-10-22
Engine
mcp-runtime-engine@0.1.0 · sdk@1.32.0

Changes since the last refresh

New in the registry: not in the list of 2026-10-04, listed on 2026-10-23 with version 1.0.0 (published 2026-10-07).

Source: the official MCP Registry list on 2026-10-04 and on 2026-10-23.

What it is

What does this server offer?

Observed inventory
68tools
134resources
0prompts

What it mainly works on, as our AI model read its tool descriptions: files and code on the machine it runs on.

37 of 68 tools are described as changing something (creating, editing, deleting, sending or running).

  • search_docson 140 other serversreads or searches

    “Search ZeroWidth product documentation.”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs, 1 required
    • querystringrequired“Search query — keywords or natural-language phrase.”
    • limitinteger“Max number of results.”
  • get_docon 42 other serversreads or searches

    “Fetch the full Markdown body of a specific docs page by its slug.”

    Publisher declares: read-only yes · destructive no · open-world no

    1 input, 1 required
    • slugstringrequired“Page slug.”
  • list_docson 31 other serversreads or searches

    “Enumerate all available docs pages, optionally filtered by product (e.g.”

    Publisher declares: read-only yes · destructive no · open-world no

    1 input
    • productstring“Optional product slug filter (e.g.”
  • comments_liston 6 other serversreads or searches

    “Lists the comment threads on one workspace entity (open first, then resolved) with authors and timestamps.”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs, 2 required
    • entityKindstringrequired“What the thread hangs on.”
    • entityIdstringrequired
    • workspacestring“Workspace slug.”
  • comments_createon 5 other serverssends messagesdescribed as changing data

    “Posts a comment on a workspace entity — a new thread, or a reply when rootId is given.”

    Publisher declares: read-only no · destructive no · open-world no

    7 inputs, 3 required
    • entityKindstringrequired“What the thread hangs on.”
    • entityIdstringrequired
    • bodystringrequired
    • rootIdstring“Reply into this thread; omit to start a new one.”
    • mentionedUserIdsarray
    • workspacestring“Workspace slug.”
    • approvalIdstring
  • comments_resolveon 5 other serversdescribed as changing data

    “Sets a comment thread's resolved state (rootId = the thread's root comment id).”

    Publisher declares: read-only no · destructive yes · open-world no

    4 inputs, 2 required
    • rootIdstringrequired
    • resolvedbooleanrequired
    • workspacestring“Workspace slug.”
    • approvalIdstring
  • napkin_boards_listreads or searches

    “Lists sketch boards in the active workspace — name, id, kind (sketch / deck), shape count, last activity.”

    Publisher declares: read-only yes · destructive no · open-world no

    4 inputs
    • qstring“Name contains (case-insensitive).”
    • kindstring“Only sketches or only decks.”
    • includeArchivedboolean“Also list archived boards (default false).”
    • workspacestring“Workspace slug.”
  • napkin_boards_getreads or searches

    “Returns a board's shapes as data — each with its id, kind, position, size, and text — so you can TARGET one to change or remove with napkin_draw (`updates` / `deletes` take these ids and absolute boa…”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs, 1 required
    • boardIdstringrequired“Napkin board id (from napkin_boards_list).”
    • workspacestring“Workspace slug.”
  • napkin_boards_viewreads or searches

    “Renders the sketch board to an image and returns it so you can SEE what's drawn — layout, arrows, handwriting-style strokes, sticky notes — not just data about it.”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs, 1 required
    • boardIdstringrequired“Napkin board id to render.”
    • workspacestring“Workspace slug.”
  • napkin_boards_updatecreates or changes datadescribed as changing data

    “Edits a board's details: name, description, visibility, or `archived` (true takes it out of the gallery; false brings it back — the recovery move for a board you created by mistake or the user no lon…”

    Publisher declares: read-only no · destructive yes · open-world no

    6 inputs, 1 required
    • boardIdstringrequired“Napkin board id (from napkin_boards_list).”
    • namestring
    • descriptionstring
    • visibilitystring“Who can see it: PRIVATE (only the user), WORKSPACE (every member, the default), or SHARED (specific people, granted afterwards).”
    • archivedboolean
    • workspacestring“Workspace slug.”
  • napkin_deck_outlinereads or searches

    “Returns a Napkin deck as a markdown outline — one section per slide in presentation order, with slide titles, text content (bold + bullets preserved), empty layout stubs still awaiting content, and a…”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs, 1 required
    • boardIdstringrequired“Napkin board id (a deck).”
    • workspacestring“Workspace slug.”
  • napkin_slide_viewreads or searches

    “Renders a single slide of a Napkin deck to an image — exactly what present mode shows, cropped to the slide.”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs, 2 required
    • boardIdstringrequired“Napkin board id (a deck).”
    • slideintegerrequired“1-based slide number in presentation order.”
    • workspacestring“Workspace slug.”
Show 56 more tools
  • napkin_boards_createcreates or changes datadescribed as changing data

    “Creates a blank Napkin board — a sketch (free canvas) or a deck (slides).”

    Publisher declares: read-only no · destructive no · open-world no

    3 inputs, 1 required
    • namestringrequired“Board name.”
    • kindstring“Defaults to "sketch".”
    • workspacestring“Workspace slug.”
  • napkin_deck_writecreates or changes datadescribed as changing data

    “Creates a deck from a markdown outline — the SAME dialect `napkin_deck_outline` reads back, so any deck you've read shows the format.”

    Publisher declares: read-only no · destructive no · open-world no

    3 inputs, 2 required
    • namestringrequired“Deck name.”
    • outlinestringrequired“The markdown outline (dialect above).”
    • workspacestring“Workspace slug.”
  • napkin_slide_addcreates or changes datadescribed as changing data

    “Appends one slide to an existing deck.”

    Publisher declares: read-only no · destructive no · open-world no

    5 inputs, 2 required
    • boardIdstringrequired“Napkin board id (a deck).”
    • layoutstringrequired“Layout key: title | section | title-body | title-lead | two-column | three-column | comparison | statement | quote | closing | blank.”
    • titlestring“Slide title.”
    • contentstring“Markdown body — blocks split on `---` lines.”
    • workspacestring“Workspace slug.”
  • napkin_slide_fillcreates or changes datadescribed as changing data

    “Fills a slide's empty layout text areas by NAME — the names `napkin_deck_outline` surfaces as `[empty text stub: "…"]`.”

    Publisher declares: read-only no · destructive no · open-world no

    4 inputs, 3 required
    • boardIdstringrequired“Napkin board id (a deck).”
    • slideintegerrequired“1-based slide number in presentation order.”
    • textsobjectrequired“Placeholder name → content, e.g.”
    • workspacestring“Workspace slug.”
  • napkin_drawcreates or changes datadescribed as changing data

    “Draws shapes, strokes, and labels on a board — diagram on a sketch, annotate a deck slide — and, via `updates` / `deletes`, changes or removes shapes that are already there (ids from napkin_boards_ge…”

    Publisher declares: read-only no · destructive yes · open-world no

    6 inputs, 1 required
    • boardIdstringrequired“Napkin board id.”
    • slideinteger“1-based slide number (decks only) — makes coordinates slide-local.”
    • elementsarray“New elements to draw, painted in order.”
    • updatesarray“Existing shapes to change — move, resize, retext, restyle.”
    • deletesarray“Ids of existing shapes to remove (from napkin_boards_get).”
    • workspacestring“Workspace slug.”
  • napkin_deck_set_themecreates or changes datadescribed as changing data

    “Paints every slide of a deck with a theme — slide background, heading and body typefaces, and text colors — in one call, the same as picking it in the deck's theme menu.”

    Publisher declares: read-only no · destructive yes · open-world no

    4 inputs, 2 required
    • boardIdstringrequired“Napkin board id (a deck).”
    • themestringrequired“`brand` for the workspace's brand kit, `brand:<kit id>` for a particular kit (napkin_brand_list), or a built-in theme key.”
    • accentstring“Brand themes only: the name of one of the kit's colors to use as this deck's accent instead of the kit's own — for a deck about one product or campaign that ha…”
    • workspacestring“Workspace slug.”
  • napkin_slide_updatecreates or changes datadescribed as changing data

    “Changes one slide as a whole: move it to another position in the deck (`moveTo`, 1-based — the other slides shift around it), hide it from the show without deleting it (`skipped`), show or hide its s…”

    Publisher declares: read-only no · destructive yes · open-world no

    7 inputs, 2 required
    • boardIdstringrequired“Napkin board id (a deck).”
    • slideintegerrequired“1-based slide number in presentation order.”
    • moveTointeger“New 1-based position for this slide.”
    • skippedboolean“true hides the slide from present mode and exports.”
    • pageNumberboolean“Show the slide number on this slide.”
    • notesstring“Speaker notes (markdown); replaces the current notes.”
    • workspacestring“Workspace slug.”
  • napkin_brand_listreads or searches

    “Lists the workspace's brand kits: id, name, description, and which one is the workspace's brand (`isDefault`).”

    Publisher declares: read-only yes · destructive no · open-world no

    1 input
    • workspacestring“Workspace slug.”
  • napkin_brand_getreads or searches

    “Reads a brand kit — the workspace's brand unless you name another.”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs
    • kitIdstring“A brand kit id from napkin_brand_list.”
    • workspacestring“Workspace slug.”
  • napkin_brand_checkreads or searches

    “Finds words the brand says to avoid in a piece of writing, with what to say instead and why.”

    Publisher declares: read-only yes · destructive no · open-world no

    5 inputs
    • textstring“Text to check.”
    • boardIdstring“A deck or sketch to check.”
    • docIdstring“A doc to check.”
    • kitIdstring“A brand kit id from napkin_brand_list.”
    • workspacestring“Workspace slug.”
  • napkin_brand_applycreates or changes datadescribed as changing data

    “Restyles a piece in the brand — the workspace's brand unless you name a kit.”

    Publisher declares: read-only no · destructive yes · open-world no

    5 inputs
    • deckstring“Board id of a deck.”
    • interfacestring“Interface id.”
    • accentstring“Name of one of the kit's colors to use as this piece's accent.”
    • kitIdstring“A brand kit id from napkin_brand_list.”
    • workspacestring“Workspace slug.”
  • napkin_brand_draftcreates or changes datadescribed as changing data

    “Creates a new brand kit, or edits one that is NOT the workspace's brand.”

    Publisher declares: read-only no · destructive yes · open-world no

    6 inputs
    • kitIdstring“Kit to edit.”
    • namestring
    • descriptionstring
    • fromKitIdstring“New kits only: start from this kit's values.”
    • contentobject
    • workspacestring“Workspace slug.”
  • napkin_brand_fontscreates or changes datadescribed as changing data

    “Gets the font files for a kit's typefaces from Google Fonts and keeps them in the kit, so decks, slide pictures and the canvas draw the brand's real typefaces instead of a stand-in.”

    Publisher declares: read-only no · destructive no · open-world yes

    2 inputs
    • kitIdstring“Kit to fetch fonts for.”
    • workspacestring“Workspace slug.”
  • napkin_brand_examplesreads or searches

    “Shows you the pictures in a kit's Examples sections — screenshots of work that gets the brand right — with each one's note on what makes it good, plus the example links.”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs
    • kitIdstring“Kit to look at.”
    • workspacestring“Workspace slug.”
  • napkin_brand_add_filescreates or changes datadescribed as changing data

    “Adds pictures to a brand kit section — logo versions, product marks, example screenshots, imagery.”

    Publisher declares: read-only no · destructive no · open-world yes

    5 inputs, 3 required
    • kitIdstringrequired“The kit to add to (napkin_brand_list).”
    • sectionstringrequired“Title of the section to add them to, like Logo, Imagery or Examples.”
    • kindstring“Only when no section has that title yet: the kind of section to make.”
    • filesarrayrequired
    • workspacestring“Workspace slug.”
  • napkin_brand_viewreads or searches

    “Look at the pictures in a brand kit — logos, product marks, footage stills, layout references, examples — before you use them.”

    Publisher declares: read-only yes · destructive no · open-world no

    4 inputs
    • kitIdstring“A kit from napkin_brand_list.”
    • sectionstring“Show the pictures in this section.”
    • namesarray“Show these pictures, by name.”
    • workspacestring“Workspace slug.”
  • napkin_deck_exportdescribed as changing data

    “Exports a deck's slides as PNG files at each slide's real pixels — a square post at 1080×1080, a story at 1080×1920, a leaderboard at 728×90 — ready to upload to an ad platform or a social post.”

    Publisher declares: read-only no · destructive no · open-world no

    3 inputs, 1 required
    • boardIdstringrequired“The deck to export.”
    • slidesarray“Just these slides (1-based, as the deck shows them).”
    • workspacestring“Workspace slug.”
  • napkin_layouts_listreads or searches

    “Lists the slide layouts napkin_deck_compose can build from — the brand kit's own first, then the built-in ones — with when to use each and the slots it takes (`needs` must be filled; `takes` are opti…”

    Publisher declares: read-only yes · destructive no · open-world no

    1 input
    • workspacestring“Workspace slug.”
  • napkin_deck_composecreates or changes datadescribed as changing data

    “Builds a designed deck: each slide is a layout with its slots filled, or HTML and CSS you write; a real browser lays it out, and it becomes an ordinary Napkin deck people can edit.”

    Publisher declares: read-only no · destructive yes · open-world no

    10 inputs, 1 required
    • boardIdstring“Deck to rebuild or change.”
    • namestring“Name for a new deck.”
    • slidesarrayrequired
    • cssstring“CSS shared by every slide.”
    • slideinteger“Replace just this slide (1-based) with the one slide given.”
    • appendboolean“Add these slides after the existing ones.”
    • accentstring“Name of one of the brand's colors to use as var(--brand-accent) for this deck — for a deck about one product or campaign that has its own color in the brand.”
    • sizestring“The size of every slide, for a new deck or a whole rebuild: 16:9 = Widescreen slide 1920×1080; 16:10 = 16:10 slide 1920×1200; 4:3 = Standard slide 1024×768; 1:…”
    • previewsboolean“Default true: the result includes a picture of every slide made.”
    • workspacestring“Workspace slug.”
  • napkin_docs_listreads or searches

    “Lists the workspace's Napkin docs (quick markdown documents — drafts, notes, working text; the LINEAR surface, distinct from boards which are drawing canvases) newest first, with excerpts.”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs
    • qstring“Title contains (case-insensitive).”
    • includeArchivedboolean“Also list archived docs (default false).”
    • workspacestring“Workspace slug.”
  • napkin_docs_getreads or searches

    “Fetch one Napkin doc's full markdown body by id (from napkin_docs_list).”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs, 1 required
    • docIdstringrequired“Doc id from napkin_docs_list.”
    • workspacestring“Workspace slug.”
  • napkin_docs_createcreates or changes datadescribed as changing data

    “Create a Napkin doc — a markdown DOCUMENT (prose, structure, code blocks), not a drawing canvas (that's napkin_boards_create) and not slides (napkin_deck_write).”

    Publisher declares: read-only no · destructive no · open-world no

    3 inputs
    • titlestring
    • bodystring“Initial markdown body.”
    • workspacestring“Workspace slug.”
  • napkin_docs_updatecreates or changes datadescribed as changing data

    “Edit a Napkin doc.”

    Publisher declares: read-only no · destructive yes · open-world no

    10 inputs, 1 required
    • docIdstringrequired“Doc id from napkin_docs_list.”
    • titlestring
    • descriptionstring“Short gallery summary.”
    • editsarray“Targeted find/replace pairs, applied in order.”
    • bodystring“Full replacement markdown body.”
    • appendstring“Markdown appended to the end (own paragraph).”
    • visibilitystring“Who can see it: PRIVATE (only the user), WORKSPACE (every member, the default), or SHARED (specific people, granted afterwards).”
    • archivedboolean
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_sheets_listreads or searches

    “Lists the workspace's Napkin sheets (multi-tab spreadsheets — the small-data surface) newest first with tab/chart counts.”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs
    • qstring“Title contains (case-insensitive).”
    • includeArchivedboolean“Also list archived sheets (default false).”
    • workspacestring“Workspace slug.”
  • napkin_sheets_schemareads or searches

    “Returns a sheet's tabs as SQL table definitions — CREATE TABLE scripts with row counts (each tab is a table; its header row names the columns; formula cells contribute computed values).”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs, 1 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • workspacestring“Workspace slug.”
  • napkin_sheets_queryruns code or commands

    “Runs a SQLite SELECT over a sheet's tabs-as-tables (get the table/column names from napkin_sheets_schema first).”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs, 2 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • sqlstringrequired“A single SELECT.”
    • workspacestring“Workspace slug.”
  • napkin_sheets_view_chartreads or searches

    “Renders one of a sheet's pinned charts against the LIVE data and returns the image so you can SEE it — the exact chart the user sees.”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs, 2 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • chartIdstringrequired“Chart id (napkin_sheets_list shows chart counts; the sheet's charts carry ids).”
    • workspacestring“Workspace slug.”
  • napkin_sheets_set_cellscreates or changes datadescribed as changing data

    “Sets cells in one tab of a sheet, by A1 address — values or formulas ('=SUM(B2:B9)').”

    Publisher declares: read-only no · destructive yes · open-world no

    5 inputs, 2 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • tabNamestring“Tab name (defaults to the first tab).”
    • cellsobjectrequired“A1 → raw value/formula, e.g.”
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_sheets_add_chartcreates or changes datadescribed as changing data

    “Adds a LIVE chart to a sheet — its SQL re-runs against the tabs on every view, so it never goes stale.”

    Publisher declares: read-only no · destructive no · open-world no

    8 inputs, 4 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • titlestringrequired“Chart title.”
    • typestringrequired
    • sqlstringrequired“The SELECT to chart.”
    • xstring
    • seriesarray
    • stackedboolean“Stack the series (bar/area only).”
    • workspacestring“Workspace slug.”
  • napkin_sheets_createcreates or changes datadescribed as changing data

    “Creates a Napkin sheet (multi-tab spreadsheet), optionally titled.”

    Publisher declares: read-only no · destructive no · open-world no

    2 inputs
    • titlestring
    • workspacestring“Workspace slug.”
  • napkin_sheets_updatecreates or changes datadescribed as changing data

    “Edits a sheet's details: title, description, visibility, or `archived` (true takes it out of the gallery; false brings it back — the recovery move for a sheet created by mistake or no longer wanted).”

    Publisher declares: read-only no · destructive yes · open-world no

    6 inputs, 1 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • titlestring
    • descriptionstring“Short gallery summary.”
    • visibilitystring“Who can see it: PRIVATE (only the user), WORKSPACE (every member, the default), or SHARED (specific people, granted afterwards).”
    • archivedboolean
    • workspacestring“Workspace slug.”
  • napkin_tables_getreads or searches

    “A table tab's columns (name, type, choices), its views, and how many records it holds.”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs, 2 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • tablestringrequired“The table tab's name or id.”
    • workspacestring“Workspace slug.”
  • napkin_tables_queryreads or searches

    “Records from a table tab, keyed by field name, with optional where / sort / search / limit (max 500).”

    Publisher declares: read-only yes · destructive no · open-world no

    9 inputs, 2 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • tablestringrequired“The table tab's name or id.”
    • wherearray
    • matchstring
    • sortarray
    • searchstring
    • limitinteger
    • offsetinteger
    • workspacestring“Workspace slug.”
  • napkin_tables_createcreates or changes datadescribed as changing data

    “Makes a table tab — typed columns, one record per row, with grid, board and form views — in an existing sheet, or in a new sheet when sheetId is omitted.”

    Publisher declares: read-only no · destructive no · open-world no

    6 inputs, 2 required
    • sheetIdstring“Add to this sheet; omit to make a new sheet.”
    • sheetTitlestring“Title for a new sheet.”
    • namestringrequired“The table's name, e.g.”
    • columnsarrayrequired
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_tables_add_recordscreates or changes datadescribed as changing data

    “Adds records, each a map of field name → value.”

    Publisher declares: read-only no · destructive no · open-world no

    5 inputs, 3 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • tablestringrequired“The table tab's name or id.”
    • recordsarrayrequired
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_tables_update_recordscreates or changes datadescribed as changing data

    “Changes some fields of records by id (from napkin_tables_query).”

    Publisher declares: read-only no · destructive no · open-world no

    5 inputs, 3 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • tablestringrequired“The table tab's name or id.”
    • updatesarrayrequired
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_tables_delete_recordsdeletesdescribed as changing data

    “Deletes records by id.”

    Publisher declares: read-only no · destructive yes · open-world no

    5 inputs, 3 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • tablestringrequired“The table tab's name or id.”
    • idsarrayrequired
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_tables_add_columnscreates or changes datadescribed as changing data

    “Adds columns to the end of a table.”

    Publisher declares: read-only no · destructive no · open-world no

    5 inputs, 3 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • tablestringrequired“The table tab's name or id.”
    • columnsarrayrequired
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_tables_add_viewcreates or changes datadescribed as changing data

    “Adds a saved view everyone sees: a grid (with where / sort), a board (lanes from a select or person column — groupBy), or a form people fill in to add records (formFields, formTitle, formIntro).”

    Publisher declares: read-only no · destructive no · open-world no

    12 inputs, 4 required
    • sheetIdstringrequired“Sheet id from napkin_sheets_list.”
    • tablestringrequired“The table tab's name or id.”
    • namestringrequired
    • kindstringrequired
    • wherearray
    • sortarray
    • groupBystring“Board: the select or person column whose values are the lanes.”
    • formTitlestring
    • formIntrostring
    • formFieldsarray
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_diagrams_listreads or searches

    “Lists the workspace's Napkin diagrams (interactive flowcharts — processes, decision trees, system maps) newest first.”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs
    • qstring“Title contains (case-insensitive).”
    • includeArchivedboolean“Also list archived diagrams (default false).”
    • workspacestring“Workspace slug.”
  • napkin_diagrams_getreads or searches

    “Fetch one Napkin diagram's mermaid source by id (from napkin_diagrams_list).”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs, 1 required
    • diagramIdstringrequired“Diagram id from napkin_diagrams_list.”
    • workspacestring“Workspace slug.”
  • napkin_diagrams_createcreates or changes datadescribed as changing data

    “Create a Napkin diagram — an interactive FLOWCHART (process, decision tree, system map), not a doc (napkin_docs_create) or drawing canvas (napkin_boards_create).”

    Publisher declares: read-only no · destructive no · open-world no

    3 inputs
    • titlestring
    • sourcestring“Mermaid flowchart source.”
    • workspacestring“Workspace slug.”
  • napkin_diagrams_updatecreates or changes datadescribed as changing data

    “Edit a Napkin diagram: retitle, describe, REPLACE the whole mermaid source, set visibility, or `archived` (true takes it out of the gallery, false brings it back — the recovery move for a diagram cre…”

    Publisher declares: read-only no · destructive yes · open-world no

    8 inputs, 1 required
    • diagramIdstringrequired“Diagram id from napkin_diagrams_list.”
    • titlestring
    • descriptionstring“Short gallery summary.”
    • sourcestring“Mermaid flowchart source.”
    • visibilitystring“Who can see it: PRIVATE (only the user), WORKSPACE (every member, the default), or SHARED (specific people, granted afterwards).”
    • archivedboolean
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_interfaces_listreads or searches

    “List the interfaces in a workspace — small self-contained screens (a custom chat, a control panel, a prototype) that run on their own origin and can call the flows they've been granted.”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs
    • includeArchivedboolean
    • workspacestring“Workspace slug.”
  • napkin_interfaces_getreads or searches

    “Read one interface: its name, the flows it may run (with the published version each is pinned to), and the contents of its files.”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs, 1 required
    • interfaceIdstringrequired“Interface id from napkin_interfaces_list.”
    • pathstring“One file to read, e.g.”
    • workspacestring“Workspace slug.”
  • napkin_interfaces_viewreads or searches

    “See what an interface LOOKS like and DOES right now: the page RUNS from its current files under the same rules as the live page (no web fonts, no remote pictures), and you get a picture plus anything…”

    Publisher declares: read-only yes · destructive no · open-world no

    4 inputs, 1 required
    • interfaceIdstringrequired
    • sizestring“The window to look through.”
    • stepsarray“Done in order, with a picture at each `shot` (at most 6).”
    • workspacestring“Workspace slug.”
  • napkin_interfaces_createcreates or changes datadescribed as changing data

    “Create an interface — a small screen of its own the user can open and send to people.”

    Publisher declares: read-only no · destructive no · open-world no

    3 inputs
    • namestring
    • starterstring“Which worked example to start from — a whole working page, written well, that you then shape to what was asked.”
    • workspacestring“Workspace slug.”
  • napkin_interfaces_writecreates or changes datadescribed as changing data

    “Write one file of an interface.”

    Publisher declares: read-only no · destructive yes · open-world no

    11 inputs, 1 required
    • interfaceIdstringrequired“Interface id from napkin_interfaces_list.”
    • pathstring“Which file to write.”
    • editsarray“Targeted find/replace pairs, applied in order.”
    • bodystring“Full replacement contents for `path`.”
    • appendboolean“With `body`: add it to the end of `path` (creating the file if needed) instead of replacing it.”
    • deleteFileboolean“Remove `path` from the interface.”
    • namestring
    • descriptionstring
    • visibilitystring“Who can see it: PRIVATE (only the user), WORKSPACE (every member, the default), or SHARED (specific people, granted afterwards).”
    • archivedboolean
    • workspacestring“Workspace slug.”
  • napkin_interfaces_publishcreates or changes datadescribed as changing data

    “Save where an interface is now as a numbered version.”

    Publisher declares: read-only no · destructive no · open-world yes

    3 inputs, 1 required
    • interfaceIdstringrequired
    • notestring“One line on what changed.”
    • workspacestring“Workspace slug.”
  • napkin_interfaces_grantcreates or changes datadescribed as changing data

    “Set what an interface may run — flows and shims, each pinned to a published version.”

    Publisher declares: read-only no · destructive yes · open-world yes

    4 inputs, 2 required
    • interfaceIdstringrequired
    • grantsarrayrequired“The complete list.”
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • napkin_interfaces_grant_datacreates or changes datadescribed as changing data

    “Set the sheet tables, Ledger metrics and Workbench Tasks an interface may use (ADR 0085, 0086), replacing the whole list.”

    Publisher declares: read-only no · destructive yes · open-world yes

    6 inputs, 1 required
    • interfaceIdstringrequired
    • tablesarray
    • metricsarray
    • tasksarray“Workbench Tasks the page may start with zw.tasks.start, and check with zw.tasks.get.”
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
    • workspacestring“Workspace slug.”
  • search_workspaceon 10 other serversreads or searches

    “Finds anything in the workspace in one call — uploaded files (searching the text inside them), folders, Workbench flows, shims, knowledge bases and tasks, Compass pages and changes, Caliper datasets,…”

    Publisher declares: read-only yes · destructive no · open-world no

    5 inputs, 1 required
    • qstringrequired“Words, any order, case-insensitive.”
    • kindsarray“Restrict to these kinds (file, folder, flow, page, doc, dataset, …).”
    • folderIdstring“Only search inside this folder and the folders under it (ids from workspace_folders_browse or a folder hit).”
    • limitinteger
    • workspacestring“Workspace slug.”
  • entity_tags_geton 5 other serversreads or searches

    “Returns the tags on a batch of entities of one kind — the labels galleries organize by.”

    Publisher declares: read-only yes · destructive no · open-world no

    3 inputs, 2 required
    • entityKindstringrequired“Which kind the ids belong to.”
    • idsarrayrequired
    • workspacestring“Workspace slug.”
  • entity_tags_browseon 5 other serversreads or searches

    “Without a tag: every tag in use across the workspace with how many entities carry it, most-used first — the vocabulary the team already organizes by.”

    Publisher declares: read-only yes · destructive no · open-world no

    2 inputs
    • tagstring“A tag to expand into its items.”
    • workspacestring“Workspace slug.”
  • entity_tags_seton 5 other serverscreates or changes datadescribed as changing data

    “Replaces the FULL tag set on one entity (an empty list clears it).”

    Publisher declares: read-only no · destructive yes · open-world no

    5 inputs, 3 required
    • entityKindstringrequired
    • entityIdstringrequired
    • tagsarrayrequired
    • workspacestring“Workspace slug.”
    • approvalIdstring“Approval id from a prior needs_confirmation response.”
  • workspace_files_save_from_chatcreates or changes datadescribed as changing data

    “Save a picture the user attached in THIS conversation to the workspace's files, in the Home folder "From chat", and get back its file id.”

    Publisher declares: read-only no · destructive no · open-world no

    3 inputs
    • namestring“The picture's name, as in `[attached image: <name>]`.”
    • workspacestring“Workspace slug.”
    • approvalIdstring“Approval id from a prior needs_confirmation response.”

Each quoted sentence is the first sentence of the publisher’s own description. The kind of tool and the “changes data” mark are our AI model’s reading of that description, not something we tested: two differently worded runs had to agree, otherwise no label is shown, and nobody has checked them by hand. A tool without the “changes data” mark is described as only reading, searching or calculating, or the two runs did not agree. No tool was called. Read the publisher’s full description before relying on it. “Publisher declares” lists the hints the server itself sends with the tool (MCP annotations: read-only, destructive, idempotent, open-world); they are the publisher's claims, not checked by us. Inputs are the parameters in the tool's own input schema: name, declared type, whether it is required, and the first sentence of its description. Read 2026-10-23.

How well are its tools described?

Features #4 and #5

How clearly this server's own tool descriptions say what a tool does, and how consistent its tool list is. The first part is an AI model's yes/no reading of each description; the second part is counted. We do not turn it into a grade.

Descriptions

AI reading of each description

Says what the tool does
100% of 68 tools
Says what it returns
52% of 66 tools
States limits, defaults or errors
16% of 45 tools
Says when to use it
100% of 68 tools
Items covered per tool
3.0 of 4 on average

Counted from the listing

Parameters with a description
78% of 285
Tools with a description
100% of 68
Typical description length
983 characters

The tool set

Counted from the listing

Tools
68
Size of the list
about 37,060 tokens for an agent to load (characters ÷ 4)
Naming
68 of 68 names use snake_case

AI reading: easy to mix up

No pair found.

The AI items cover 68 of 68 tools: for a tool where two differently worded runs disagreed, that item is left out. They were not checked by hand, and no tool was called. “Easy to mix up” means two tools whose names or descriptions overlap without saying how they differ; the AI found none, comparing tools within groups of 40. We do not rate whether the tool set is complete or whether side effects are spelled out, because our AI reading of those was not reliable enough.

How do I add it to my client?

Config from the registry entry

From the remote endpoint (Streamable HTTP)

We connected to this URL on 2026-10-23 (a read-only session: no tool was called).

Add to CursorAn install link in the format Cursor documents, holding the Cursor config below.

Claude Desktop or claude.ai
Settings → Connectors → Add custom connector, then paste:
https://api.zerowidth.ai/mcp/x/napkin
Cursor · .cursor/mcp.json in a project, or ~/.cursor/mcp.json
{
  "mcpServers": {
    "napkin": {
      "url": "https://api.zerowidth.ai/mcp/x/napkin"
    }
  }
}
VS Code · .vscode/mcp.json
{
  "servers": {
    "napkin": {
      "type": "http",
      "url": "https://api.zerowidth.ai/mcp/x/napkin"
    }
  }
}
VS Code (command line) · Bash or zsh terminal (macOS, Linux)
code --add-mcp '{"name":"napkin","type":"http","url":"https://api.zerowidth.ai/mcp/x/napkin"}'
Claude Code
claude mcp add --transport http napkin https://api.zerowidth.ai/mcp/x/napkin
Try it in the MCP Inspector · runs on your machine, opens in your browser · Node 22.19+
npx @modelcontextprotocol/inspector@2.11.0 --server-url https://api.zerowidth.ai/mcp/x/napkin --transport http
  • Optional settings the entry also lists (left out above): Authorization.
  • The server runs on the operator's infrastructure; it may ask you to sign in when you first connect.
  • The MCP Inspector lists the server's tools, resources and prompts; a tool you call there runs for real.

Built from the server's registry entry with each client's documented format (checked 2026-10-14; the Cursor link and the VS Code command 2026-10-19; the MCP Inspector command 2026-10-21). Values in < > are yours to fill in; this page never contains a key. Where the server needs a setting the entry does not declare, it can still fail to start.

Does the registry listing match what we found?

Feature #6

The registry verifies a package once, when it is published, and does not re-check it. A difference below is about the listing, not a judgement of the publisher.

Registry saysWe foundResultSource · date
Remote endpoint api.zerowidth.ai/mcp/x/napkinSession openedmatchesour test · 2026-10-23
No credential declared as requiredOpened a session without any credentialmatchesour test · 2026-10-23

Choosing

Record checks

Public records · not a safety rating

1 of 2 record checks met · 7 do not apply

  • Not ranked by downloads: a remote server publishes no download figure
  • Not ranked by stars: no public GitHub repository
  • MetRegistry entry is active and says how to run itActive, with a package or a remote address.
  • Not metSource repository link opensThe registry entry gives no repository link.
  • Does not applyRepository is not archivedNo public GitHub repository to read.
  • Does not applyCode pushed to the repository in the 90 days before our checkNo public GitHub repository to read.
  • Does not applyRepository publishes a security policy (SECURITY.md)No public GitHub repository to read.
  • Does not applyPackage names its licence with a standard (SPDX) identifierRemote server: it ships no package.
  • Does not applyThe version the registry lists can be installed and is not withdrawnRemote server: it ships no package.
  • Does not applynpm package carries build provenance (attestation)Remote server: it ships no package.
  • Does not applyNo known critical or high advisory in the package or its dependenciesRemote server: it ships no package.

Read from public records only: the registry entry, npm/PyPI, GitHub and advisory databases, checked 2026-10-22. No tool was called. Only “met” and “not met” are counted, so the total differs between servers; a check that does not apply or that we could not run is listed, never counted against it. It is not a safety rating. How each check works · Leaderboards

Common questions about ai.zerowidth/napkin

Answered from the data above

Is ai.zerowidth/napkin safe to install?

We do not rate servers as safe or unsafe. 1 of its 2 applicable record checks are met (facts from public records, each listed on this page). What the records show: 37 of its tools describe changing data (our AI model's reading of the descriptions). These are facts with their sources on this page, not a safety guarantee, and we did not run its tools.

Is ai.zerowidth/napkin free to use?

Its website (zerowidth.ai/docs/overview/account/plans-and-billing) describes a freemium pricing model. This is an AI-classified reading of the page on 2026-10-23, so check the page itself before relying on it.

Does ai.zerowidth/napkin need an API key or sign-in?

It opened a session without any credential on 2026-10-23. The registry entry declares no required credential; no declaration is not a guarantee.

Has ai.zerowidth/napkin been security tested?

Partly. 4 of the 15 checks that apply to it were exercised. It accepted a session without any credential and lists tools whose names suggest they change data. We did not call them. No security verdict is published before verification.

What can ai.zerowidth/napkin do?

It lists 68 tools. In our AI model's reading of their descriptions (two runs had to agree, nobody checked it by hand), they include tools that read or search, create or change data, delete, send messages and run code or commands. We did not call any tool, so this describes the text, not the behaviour.

Can ai.zerowidth/napkin change or delete data?

37 of its tools say in their description that they create, edit, delete, send or run something (our AI model's reading). We did not call any tool, so we cannot say what actually happens.

Found this page useful?

Anonymous · no sign-in

A quick, anonymous reaction — no account, no email. One per kind from your browser. The tally updates when the page is next refreshed, and it is only a rough count, never a safety rating or a measured number of people.

Similar servers

Same topic · AI-read

Active servers whose topic is also “productivity-and-docs” and that have at least one tool of the same kind; most kinds in common first, then most GitHub stars. The topic and the tool kinds are an AI model's reading of the publishers' descriptions, not checked by hand. Similar is not a recommendation.

Compare with another server

Side by side: registry entry, our read-only session, the tools and the 18 classification fields. Same values as each page; no score.

Security testing

What did we test, and what did we leave out?

18 checks · features #1, #2

Open without sign-in

It accepted a session without any credential and lists tools whose names suggest they change data. We did not call them. No security score is given; a check we did not run is never counted as passed.

The 18 checks at a glanceour test · 2026-10-23
  1. Inventory: exercised
  2. Hidden instructions: exercised
  3. Real execution: not run · our policy
  4. Secret leak: not run · nothing to check it against
  5. Internal addresses: not run · our policy
  6. Unconfirmed changes: not run · our policy
  7. Bad input: not run · our policy
  8. Model requests: not run · nothing to check it against
  9. Sensitive questions: not run · nothing to check it against
  10. Folder boundary: not run · our policy
  11. Log leaks: not run · nothing to check it against
  12. Hidden content: exercised
  13. Fake assistant turns: not applicable
  14. Token passthrough: not applicable
  15. Token audience: not applicable
  16. Sign-in redirect: not run · our policy
  17. Consent handling: not testable from outside
  18. Sign-in metadata: exercised

4 exercised11 not run (reason given)3 not applicable

Each check ends in exactly one state: exercised, not run (with the reason), or not applicable (with the reason). 4 of the 15 checks that apply to it were exercised. We do not publish security-check outcomes for named servers.

Exercised · 4
  • 1Inventory
    tool-list    Reads the declared tools, resources and prompts.exercised
  • 2Hidden instructions
    description-poisoning    Looks for hidden instructions in tool descriptions.exercised
  • 12Hidden content
    audience-hiding    Checks resources that hide content from the user.exercised
  • 18Sign-in metadata
    oauth-url-scheme    Checks the published sign-in metadata for unsafe URLs.exercised
Not run, with the reason · 11
  • 3Real execution
    real-execution    Calls a tool and checks what really happens.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 4Secret leak
    canary-leak    Plants a fake secret and checks whether it leaks.This check needs at least one successful tool call to have something to check, and no tool was called.not run · nothing to check it against
  • 5Internal addresses
    ssrf    Checks whether a tool can be steered to internal addresses.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 6Unconfirmed changes
    write-without-confirmation    Checks whether tools that change data act without asking.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 7Bad input
    error-handling    Sends bad input and watches how the server answers.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 8Model requests
    sampling    Checks whether the server asks the client's model to act for it.This check needs at least one successful tool call to have something to check, and no tool was called.not run · nothing to check it against
  • 9Sensitive questions
    elicitation-sensitive-data    Checks whether the server asks users for sensitive data.This check needs at least one successful tool call to have something to check, and no tool was called.not run · nothing to check it against
  • 10Folder boundary
    root-boundary    Checks whether the server reaches outside the folders it was given.This check calls the server's tools. ProtocolProbe calls no server's tools for anything it publishes; an operator can run this check on their own server with our self-test command.not run · our policy
  • 11Log leaks
    logging-side-channel    Checks whether log messages carry data they should not.This check needs at least one successful tool call to have something to check, and no tool was called.not run · nothing to check it against
  • 16Sign-in redirect
    open-redirect    Checks the sign-in redirect for abuse.Testing the sign-in redirect means sending probes to the operator's sign-in service, which we do not do.not run · our policy
  • 17Consent handling
    confused-deputy    Checks consent handling when one service acts for another.Depends on the operator's own consent screen, which differs per server and cannot be tested from outside.not testable from outside
Does not apply to this server · 3
  • 13Fake assistant turns
    fake-assistant-turn    Checks prompts that pose as the assistant's own words.The server exposes no prompts.not applicable
  • 14Token passthrough
    token-passthrough    Checks whether the server forwards a user's token to other services.The server opened a session without sign-in, so there is no token flow to check.not applicable
  • 15Token audience
    token-audience-validation    Checks whether tokens meant for another service are accepted.The server opened a session without sign-in, so there is no token flow to check.not applicable

Source: our own test, 2026-10-23, mcp-runtime-engine@0.1.0. Which checks count and why follows our published scoring model.

What happened during the test?

Feature #8

The steps in order, as the test record holds them.

  1. 0 msStarted a read-only session with the server's remote endpoint
  2. 1,384 msConnected after 0 redirects. No credential was sent or needed.
  3. Read the inventory: 68 tools, 134 resources, 0 prompts.
  4. 16,059 msFinished: 4 checks exercised.

Reference

How is it classified?

18 fields

One value per field, each with its source. Fields written by AI models are marked. A field with no value says why.

TopicAI-classified
productivity-and-docs
AI-classified · 2026-10-23
Pricing modelAI-classified
freemium
read from zerowidth.ai/docs/overview/account/plans-and-billing · 2026-10-23

“There are four tiers — Free , Starter , Pro , and Enterprise .”

Programming language
does not apply
no existing GitHub repository (server declares no repository link, so there is nothing to fetch)
Hosting type
remote (hosted by the publisher)
registry · 2026-10-23
MCP capability
resources, tools
our test · 2026-10-23
Transport
streamable HTTP
registry · 2026-10-23
Required credentials
none declared
registry · no declaration is not a guarantee
Package registry
does not apply
remote-only server: no package is shipped, so there is no package registry
Freshness
0–30 days
registry updatedAt · 2026-10-23
Lifecycle status
active
registry · 2026-10-23
License class
does not apply
remote-only server: ships no package, so there is nothing to look up in a package registry
Integrity hash
does not apply
remote-only server: ships no package, so there is nothing to look up in a package registry
Signature / provenance
does not apply
remote-only server: ships no package, so there is nothing to look up in a package registry
Dependency advisories
does not apply
ships no package, so there are no dependencies to audit
Popularity
does not apply
remote-only server: ships no package, so there is nothing to look up in a package registry
Publisher signals
not stated
no readable GitHub owner to describe
Maintenance
does not apply
server declares no repository link, so there is nothing to fetch
Environment
the publisher's infrastructure
where it runs, from the hosting type

“Not stated” means the source did not state it; “does not apply” means it does not apply to this kind of server; “our limit” means our own lookup failed. A linked value opens the directory filtered to the same value.

Cite or correct this page

Sources and corrections

Suggested citation

ProtocolProbe. “ai.zerowidth/napkin: MCP server record.” Data checked 2026-10-23. https://protocolprobe.com/mcp/servers/ai.zerowidth/napkin

Figures are valid for the date shown. Our facts on this page are CC BY 4.0: reuse them with a link and the check date. Quoted text (the publisher’s descriptions, website quotes, tool names) is not ours to license.

As JSON: this record in the API · API documentation.

Badge for your README

ProtocolProbe: 1 of 2 record checks met

[![ProtocolProbe](https://protocolprobe.com/api/v1/badge/ai.zerowidth/napkin)](https://protocolprobe.com/mcp/servers/ai.zerowidth/napkin)

It shows this server's record-check count: facts from public records, no tool called. It is not a security rating or a pass. It links here and updates after each data reload.

Something wrong, or is this yours?

If a fact here is wrong, tell us and we will re-check it. If you operate this server, you can run our checks on it yourself with the free self-test command; we call no server’s tools ourselves for anything shown here.

Write to hello@protocolprobe.com · corrections log · methodology