MCP servers › io.github.SajanMelcher › plumbline-mcp

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

io.github.SajanMelcher/plumbline-mcp

A Mentat's eye on Sui DeepBook v3: read-only market data plus desk template tools. No keys. — the publisher's description

4 of 5 record checks metRead-only · tools listed 2026-10-23Topic: finance-and-payments · AI-classifiedPricing: freemium · AI-classifiedversion 0.3.3TypeScriptstreamable HTTP31 tools

Summary

io.github.SajanMelcher/plumbline-mcp is a remote MCP server listed in the official MCP registry at version 0.3.3. On 2026-10-23 ProtocolProbe connected to it in read-only mode and read its inventory: 31 tools, 2 resources and 3 prompts.

Record checks

4 of 5 record checks met · 4 do not apply

met: Registry entry is active and says how to run it
met: Source repository link opens
met: Repository is not archived
met: Code pushed to the repository in the 90 days before our check
not met: 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not applicable: The version the registry lists can be installed and is not withdrawn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: 0 stars (ranked from 10)

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
Repository: public
Tools: 31
Described as changing data: 8 of 31 toolsAI-classified
Topic: finance-and-paymentsAI-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 1 tool whose name or declaration suggests it changes data (create_template_order). That is our reading of the names; we did not call it. Source: our connection, 2026-10-23.

Worth knowing before you connect it

8 tools are described as changing something (create_template_order, build_swap_tx, build_create_balance_manager_tx, …): 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

0.3.3, published 2026-10-10 (registry, as of the 2026-10-23 snapshot)

First listed version

2026-10-09 (earliest version still in the registry; older removed versions would be earlier)

Version history

2 versions listed, 2026-10-09 to 2026-10-10; 2 in the 90 days before the 2026-10-23 snapshot.

Most recent 2 versions

0.3.3 · 2026-10-10
0.2.0 · 2026-10-09

(versions still listed in the registry only)

Registry data

snapshot 2026-10-23

Package and repository

checked 2026-10-23

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 0.3.3 (published 2026-10-10).

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

31tools

2resources

3prompts

8 of 31 tools are described as changing something (creating, editing, deleting, sending or running). For 1 the reading was uncertain, so no mark is shown.

list_poolson 7 other serversreads or searches
“List Sui DeepBook v3 spot pools with base/quote assets and trading params (tick, lot, min size in human units).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
4 inputs
- assetstring“Only pools containing this asset symbol, e.g.”
- include_idsboolean“Include pool object IDs and coin types (longer output)”
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
get_mid_pricereads or searches
“Best bid, best ask, mid price and spread (abs and bps) for a DeepBook pool, plus last trade price.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
3 inputs, 1 required
- poolstringrequired“DeepBook pool name BASE_QUOTE, e.g.”
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
get_order_bookon 5 other serversreads or searches
“Order book for a DeepBook pool: top N price levels per side and cumulative liquidity (base qty and quote notional) within ±X% of mid.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
5 inputs, 1 required
- poolstringrequired“DeepBook pool name BASE_QUOTE, e.g.”
- levelsinteger“Price levels to return per side (1-100, default 10)”
- within_pctarray“Depth bands as % distance from mid, e.g.”
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
get_volumeon 1 other serverreads or searches
“24h volume, high/low, last price and % change for one DeepBook pool, or the top pools by 24h quote volume if no pool is given.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
5 inputs
- poolstring“DeepBook pool name BASE_QUOTE, e.g.”
- window_hoursinteger“Trailing window in hours (default 24).”
- topinteger“When no pool is given: how many pools to return (default 10)”
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
get_pool_paramsreads or searches
“Taker/maker fees, DEEP stake required, tick/lot/min size, whitelist/stable flags and vault balances for a DeepBook pool.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
3 inputs, 1 required
- poolstringrequired“DeepBook pool name BASE_QUOTE, e.g.”
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
get_recent_tradeson 7 other serversreads or searches
“Most recent fills in a DeepBook pool (newest first): time, taker side, price, base and quote size.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
7 inputs, 1 required
- poolstringrequired“DeepBook pool name BASE_QUOTE, e.g.”
- limitinteger“Number of trades (1-200, default 20)”
- start_timeinteger“Unix timestamp in SECONDS”
- end_time“Unix timestamp in SECONDS”
- include_txboolean“Include transaction digests (longer output)”
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
get_ohlcvon 7 other serversreads or searches
“OHLCV candles for a DeepBook pool (oldest first).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
7 inputs, 1 required
- poolstringrequired“DeepBook pool name BASE_QUOTE, e.g.”
- intervalstring
- limitinteger“Number of candles (1-500, default 24)”
- start_timeinteger“Unix timestamp in SECONDS”
- end_time“Unix timestamp in SECONDS”
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
get_indexer_statuson 1 other serverreads or searches
“Health and freshness of the public DeepBook indexer (status, latest checkpoint, server time).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
Takes no inputs.
get_bm_fillsreads or searches
“Fills (OrderFilled) where a given DeepBook BalanceManager was the maker or the taker in one pool, newest first: time, its side, price, qty, fee, tx.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
7 inputs, 2 required
- poolstringrequired“DeepBook pool name BASE_QUOTE, e.g.”
- balance_manager_idstringrequired“DeepBook BalanceManager object id (0x + 64 hex)”
- rolestring
- limitinteger
- hoursinteger“Look-back window in hours (default 168 = 7 days)”
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
get_swing_rangereads or searches
“1h/4h/24h high-low range and realized volatility from hourly candles, a regime (CALM < 2%, ELEVATED 2-4%, HIGH_VOL > 4% 4h range) and a suggested ladder rung count (3/4/5).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
3 inputs, 1 required
- poolstringrequired“DeepBook pool name BASE_QUOTE, e.g.”
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
get_pool_statson 3 other serversreads or searches
“Scorecard-style stats for one pool over the last N hours: trade count, taker buy/sell split, base/quote volume, VWAP, average trade size, price range, current spread.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
4 inputs, 1 required
- poolstringrequired“DeepBook pool name BASE_QUOTE, e.g.”
- hoursinteger
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”
estimate_feeson 6 other serversreads or searches
“Estimated DeepBook fee for a fill of qty at price as maker or taker, paid in the input token (rate x 1.25) versus in DEEP (base rate), using the live on-chain fee rates and the DEEP_USDC mid.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
6 inputs, 2 required
- poolstringrequired“DeepBook pool name BASE_QUOTE, e.g.”
- qtynumberrequired“Base quantity”
- pricenumber“Price; defaults to the current mid”
- rolestring
- payment_tokenstring“Only after the free tier: the private payment_token from the payment-required response; it holds your prepaid calls”
- payment_txstring“Only after the free tier: Sui transaction digest of your exact USDC payment for payment_token (see the payment-required response)”

Show 19 more tools

list_templateson 111 other serversreads or searches
“List The Spice Melange Golden Path Grok Bot templates with prices in Sui USDC, versions and the no-checkout agent buying flow (from https://thespicemelange.org/store/catalog.json).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
Takes no inputs.
create_template_ordercreates or changes datadescribed as changing data
“Create a store order for one template.”
Publisher declares: read-only no · destructive no · idempotent no · open-world yes
2 inputs, 1 required
- skustringrequired“Template sku from list_templates, e.g.”
- emailstring“Optional receipt email”
check_template_order
“With a digest: verify your on-chain payment for an order and get the signed download link (plus add-ons).”
Publisher declares: read-only no · destructive no · idempotent yes · open-world yes
3 inputs, 2 required
- order_idstringrequired“Order id from create_template_order (SM-...)”
- tokenstringrequired“Private order token from create_template_order (smt_...).”
- digeststring“Sui transaction digest of your exact USDC payment”
get_desk_rhythmreads or searches
“The desk's weekly rhythm from https://thespicemelange.org/rhythm.json: focus pools, ladder windows, rung guidance, rebalance ranges, projects and lessons.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
Takes no inputs.
wallet_setup_guidereads or searches
“Exact steps and @mysten/sui code for an agent to create its OWN Sui Ed25519 keypair locally, fund it with SUI (gas) and USDC, and sign/submit transactions itself.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world no
Takes no inputs.
get_swap_quoteon 20 other serversreads or searches
“Quote a spot swap between SUI/USDC/WAL/DEEP/CETUS and compare DeepBook v3 pools directly (direct or 2-hop) with the Cetus aggregator.”
Publisher declares: read-only yes · destructive no · idempotent no · open-world yes
4 inputs, 4 required
- fromstringrequired“Coin symbol: SUI, USDC, WAL, DEEP, CETUS”
- torequired
- amountnumberrequired“Amount of the from coin in human units, e.g.”
- senderstringrequired“YOUR Sui address (0x...).”
build_swap_txon 2 other serversruns code or commandsdescribed as changing data
“Build base64 UNSIGNED Sui transaction bytes for a swap on the chosen venue, with the sender set to your address and an on-chain minimum-out from slippage_bps.”
Publisher declares: read-only yes · destructive no · idempotent no · open-world yes
8 inputs, 5 required
- fromstringrequired“Coin symbol: SUI, USDC, WAL, DEEP, CETUS”
- torequired
- amountnumberrequired“Amount of the from coin in human units, e.g.”
- senderstringrequired“YOUR Sui address (0x...).”
- venuestringrequired“Venue from get_swap_quote (best.venue)”
- routestring“DeepBook only: route string from get_swap_quote, e.g.”
- slippage_bpsinteger“Max slippage in basis points (50 = 0.5%); tx reverts below min_out”
- simulateboolean“Simulate the unsigned bytes against mainnet (no signature, nothing executed)”
check_holderreads or searches
“Check on chain (Sui mainnet) whether an address holds the The Secret Journals license token.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- addressstringrequired“YOUR Sui address (0x...).”
golden_path_market_readreads or searches
“For The Secret Journals holders (checked on chain from 'address'): a compact market read across SUI, WAL and DEEP on DeepBook (mid, spread, 24h volume, 1h/4h/24h range and regime) plus the Golden Pat…”
Publisher declares: read-only yes · destructive no · idempotent no · open-world yes
1 input, 1 required
- addressstringrequired“YOUR Sui address (0x...).”
build_create_balance_manager_txruns code or commandsdescribed as changing data
“Create and share a DeepBook v3 BalanceManager owned by your address (needed for limit orders).”
Publisher declares: read-only yes · destructive no · idempotent no · open-world yes
1 input, 1 required
- senderstringrequired“YOUR Sui address (0x...).”
build_bm_deposit_txruns code or commandsdescribed as changing data
“Deposit a coin from your wallet into your own BalanceManager.”
Publisher declares: read-only yes · destructive no · idempotent no · open-world yes
4 inputs, 4 required
- senderstringrequired“YOUR Sui address (0x...).”
- balance_manager_idstringrequired“YOUR DeepBook BalanceManager id (0x + 64 hex), from build_create_balance_manager_tx effects”
- coinstringrequired“Coin symbol: SUI, USDC, WAL, DEEP, CETUS”
- amountnumberrequired“Amount of the from coin in human units, e.g.”
build_bm_withdraw_txruns code or commandsdescribed as changing data
“Withdraw a coin from your own BalanceManager back to your address (always to the owner).”
Publisher declares: read-only yes · destructive no · idempotent no · open-world yes
4 inputs, 4 required
- senderstringrequired“YOUR Sui address (0x...).”
- balance_manager_idstringrequired“YOUR DeepBook BalanceManager id (0x + 64 hex), from build_create_balance_manager_tx effects”
- coinstringrequired“Coin symbol: SUI, USDC, WAL, DEEP, CETUS”
- amountnumberrequired“Amount of the from coin in human units, e.g.”
build_limit_order_txruns code or commandsdescribed as changing data
“Place a spot limit order on a DeepBook v3 pool from your BalanceManager (fees in the input coin, no DEEP needed).”
Publisher declares: read-only yes · destructive no · idempotent no · open-world yes
10 inputs, 6 required
- senderstringrequired“YOUR Sui address (0x...).”
- balance_manager_idstringrequired“YOUR DeepBook BalanceManager id (0x + 64 hex), from build_create_balance_manager_tx effects”
- poolstringrequired“DeepBook pool BASE_QUOTE, e.g.”
- sidestringrequired
- pricenumberrequired
- quantitynumberrequired“Base quantity”
- post_onlyboolean“Post-only (maker): rejects if it would cross”
- expire_hoursnumber
- deposit_firstboolean“Also deposit the needed coin from your wallet in the same tx”
- client_order_idstring
build_cancel_order_txruns code or commandsdescribed as changing data
“Cancel one order (order_id) or all your orders in a pool, and withdraw settled amounts into your BalanceManager.”
Publisher declares: read-only yes · destructive no · idempotent no · open-world yes
4 inputs, 3 required
- senderstringrequired“YOUR Sui address (0x...).”
- balance_manager_idstringrequired“YOUR DeepBook BalanceManager id (0x + 64 hex), from build_create_balance_manager_tx effects”
- poolstringrequired“DeepBook pool BASE_QUOTE, e.g.”
- order_idstring
get_book_depthreads or searches
“Level-2 depth around mid read on chain from a DeepBook v3 pool (bids/asks [price, qty]).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs, 1 required
- poolstringrequired“DeepBook pool BASE_QUOTE, e.g.”
- ticksinteger
get_cetus_poolreads or searches
“Read-only Cetus CLMM pool state (coins, fee rate, tick spacing, liquidity, current tick, price) by pool_id, or discover the Cetus pools on the current from->to route.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
3 inputs
- pool_idstring
- fromstring“Coin symbol: SUI, USDC, WAL, DEEP, CETUS”
- to“Coin symbol: SUI, USDC, WAL, DEEP, CETUS”
walrus_store_guidereads or searches
“How to store a PUBLIC trade receipt or strategy note on Walrus mainnet with your own key (receipt schema + @mysten/walrus code).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world no
Takes no inputs.
build_walrus_register_txruns code or commandsdescribed as changing data
“Encode your public text (receipt/note) and build the Walrus register-blob tx paid in WAL by you; returns the blob_id.”
Publisher declares: read-only yes · destructive no · idempotent no · open-world yes
3 inputs, 2 required
- senderstringrequired“YOUR Sui address (0x...).”
- contentstringrequired
- epochsinteger
read_walrus_blobreads or searches
“Read a public Walrus mainnet blob by id via the public aggregator (text, or base64 preview if binary; max 64 KB).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs, 1 required
- blob_idstringrequired
- max_bytesinteger

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 31 tools
Says what it returns: 100% of 31 tools
States limits, defaults or errors: 100% of 23 tools
Says when to use it: 100% of 31 tools
Items covered per tool: 4.0 of 4 on average

Counted from the listing

Parameters with a description: 83% of 106
Tools with a description: 100% of 31
Typical description length: 395 characters

The tool set

Counted from the listing

Tools: 31
Size of the list: about 9,793 tokens for an agent to load (characters ÷ 4)
Naming: 31 of 31 names use snake_case

AI reading: easy to mix up

No pair found.

The AI items cover 31 of 31 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. 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://plumbline-mcp.fly.dev/mcp

Cursor · .cursor/mcp.json in a project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "plumbline-mcp": {
      "url": "https://plumbline-mcp.fly.dev/mcp"
    }
  }
}

VS Code · .vscode/mcp.json

{
  "servers": {
    "plumbline-mcp": {
      "type": "http",
      "url": "https://plumbline-mcp.fly.dev/mcp"
    }
  }
}

VS Code (command line) · Bash or zsh terminal (macOS, Linux)

code --add-mcp '{"name":"plumbline-mcp","type":"http","url":"https://plumbline-mcp.fly.dev/mcp"}'

Claude Code

claude mcp add --transport http plumbline-mcp https://plumbline-mcp.fly.dev/mcp

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://plumbline-mcp.fly.dev/mcp --transport http

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 says	We found	Result	Source · date
Remote endpoint plumbline-mcp.fly.dev/mcp	Session opened	matches	our test · 2026-10-23
No credential declared as required	Opened a session without any credential	matches	our test · 2026-10-23
Repository github.com/SajanMelcher/plumbline-mcp	Opens publicly	matches	api.github.com · 2026-10-23

Who made it?

Feature #7 · lineage

Facts about the publisher. We do not turn them into a trust score.

Namespace: io.github.SajanMelcher
GitHub owner: a personal account (SajanMelcher)

Repository: github.com/SajanMelcher/plumbline-mcp
Stars: 0
Repository age: 0–30 days
Last push: 0–30 days ago
Archived: no
Security policy: none found (we looked for SECURITY.md in the repository and in its owner’s .github repository)

Source: the registry entry and api.github.com · 2026-10-23; security policy read from GitHub · 2026-10-23.

Publish this server? Run these checks against it yourself before release, from your own machine: a server the command starts, or your own server at its URL after a one-time proof that you control it: npx protocolprobe-selftest.

Choosing

Record checks

Public records · not a safety rating

4 of 5 record checks met · 4 do not apply

Not ranked by downloads: a remote server publishes no download figure
Not ranked by stars: 0 stars (ranked from 10)

MetRegistry entry is active and says how to run itActive, with a package or a remote address.
MetSource repository link opensThe linked GitHub repository is public.
MetRepository is not archivedNot archived.
MetCode pushed to the repository in the 90 days before our checkLast push 0-30 days before our check.
Not metRepository publishes a security policy (SECURITY.md)No SECURITY.md in the places GitHub reads it from.
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 2026-10-23. 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 io.github.SajanMelcher/plumbline-mcp

Answered from the data above

Is io.github.SajanMelcher/plumbline-mcp safe to install?

We do not rate servers as safe or unsafe. 4 of its 5 applicable record checks are met (facts from public records, each listed on this page). What the records show: Its source repository opens publicly. Its repository had a push in the last 90 days. 8 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 io.github.SajanMelcher/plumbline-mcp free to use?

Its website (thespicemelange.org/plumbline/) 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 io.github.SajanMelcher/plumbline-mcp 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 io.github.SajanMelcher/plumbline-mcp 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 io.github.SajanMelcher/plumbline-mcp do?

It lists 31 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 and run code or commands. We did not call any tool, so this describes the text, not the behaviour.

Can io.github.SajanMelcher/plumbline-mcp change or delete data?

8 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.

Does io.github.SajanMelcher/plumbline-mcp publish a security policy?

We found no SECURITY.md in its repository (root, .github/ or docs/) or in its owner's .github repository.

Where is the source code of io.github.SajanMelcher/plumbline-mcp?

In github.com/SajanMelcher/plumbline-mcp, which opens publicly.

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.

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Active servers whose topic is also “finance-and-payments” 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

Inventory: exercised
Hidden instructions: exercised
Real execution: not run · our policy
Secret leak: not run · nothing to check it against
Internal addresses: not run · our policy
Unconfirmed changes: not run · our policy
Bad input: not run · our policy
Model requests: not run · nothing to check it against
Sensitive questions: not run · nothing to check it against
Folder boundary: not run · our policy
Log leaks: not run · nothing to check it against
Hidden content: exercised
Fake assistant turns: exercised
Token passthrough: not applicable
Token audience: not applicable
Sign-in redirect: not run · our policy
Consent handling: not testable from outside
Sign-in metadata: not applicable

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-listReads the declared tools, resources and prompts.exercised
2Hidden instructions
description-poisoningLooks for hidden instructions in tool descriptions.exercised
12Hidden content
audience-hidingChecks resources that hide content from the user.exercised
13Fake assistant turns
fake-assistant-turnChecks prompts that pose as the assistant's own words.exercised

Not run, with the reason · 11

3Real execution
real-executionCalls 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-leakPlants 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
ssrfChecks 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-confirmationChecks 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-handlingSends 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
samplingChecks 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-dataChecks 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-boundaryChecks 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-channelChecks 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-redirectChecks 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-deputyChecks 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

14Token passthrough
token-passthroughChecks 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-validationChecks 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
18Sign-in metadata
oauth-url-schemeChecks the published sign-in metadata for unsafe URLs.No sign-in (OAuth) metadata is published, so there are no sign-in addresses 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.

0 msStarted a read-only session with the server's remote endpoint
877 msConnected after 0 redirects. No credential was sent or needed.
Read the inventory: 31 tools, 2 resources, 3 prompts.
5,372 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

finance-and-payments

AI-classified · 2026-10-23

Pricing modelAI-classified

freemium

read from thespicemelange.org/plumbline/ · 2026-10-23

“The npm package is always free.”

Programming language

TypeScript

api.github.com · 2026-10-23

Hosting type

remote (hosted by the publisher)

registry · 2026-10-23

MCP capability

prompts, 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

owner: a personal account · repository age: 0–30 days · stars: 0–9

api.github.com · 2026-10-23

Maintenance

active

api.github.com · 2026-10-23

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. “io.github.SajanMelcher/plumbline-mcp: MCP server record.” Data checked 2026-10-23. https://protocolprobe.com/mcp/servers/io.github.SajanMelcher/plumbline-mcp

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](https://protocolprobe.com/api/v1/badge/io.github.SajanMelcher/plumbline-mcp)](https://protocolprobe.com/mcp/servers/io.github.SajanMelcher/plumbline-mcp)

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