MCP servers › si.fourzerotwo › uk-business

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

si.fourzerotwo/uk-business

Companies House, Gazette notices, sanctions screening, LEIs and UK legislation. — the publisher's description

1 of 2 record checks metRead-only · tools listed 2026-10-23Topic: data-and-databases · AI-classifiedPricing: usage-based · AI-classifiedversion 1.0.1streamable HTTP58 tools

Summary

si.fourzerotwo/uk-business is a remote MCP server listed in the official MCP registry at version 1.0.1. On 2026-10-23 ProtocolProbe connected to it in read-only mode and read its inventory: 58 tools, 0 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not applicable: The version the registry lists can be installed and is not withdrawn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

Key facts

Runs: remote (hosted by the publisher)
Transport: streamable HTTP
Sign-in: none needed to open a session
Tools: 58
Described as changing data: 0 of 58 toolsAI-classified
Mainly works on: accounts and data in outside web services; nothing outside itself: it only answers questionsAI-classified
Topic: data-and-databasesAI-classified
Pricing: usage-basedAI-classified
Last tested: 2026-10-23

Add to your client

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

1.0.1, published 2026-10-11 (registry, as of the 2026-10-23 snapshot)

First listed version

2026-10-11 (earliest version still in the registry; older removed versions would be earlier)

Version history

2 versions listed, all on 2026-10-11; 2 in the 90 days before the 2026-10-23 snapshot.

Most recent 2 versions

1.0.1 · 2026-10-11
1.0.0 · 2026-10-11

(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 1.0.1 (published 2026-10-11).

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

58tools

0resources

0prompts

What it mainly works on, as our AI model read its tool descriptions: accounts and data in outside web services; nothing outside itself: it only answers questions.

None of its 58 tools are described as changing anything.

gleif__lookupreads or searches
“Legal name, addresses, jurisdiction, legal form, status and registration for one LEI.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- leistringrequired“20-character Legal Entity Identifier”
gleif__searchreads or searches
“Entities whose legal name matches.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- namestringrequired“Legal name”
gleif__fuzzyreads or searches
“Best fuzzy matches of a name to LEIs — for messy company names.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- qstringrequired“Approximate name”
gleif__autocompletereads or searches
“Name autocompletion across the LEI index.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- qstringrequired“Partial name”
gleif__direct-parentreads or searches
“The direct accounting parent of an entity.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- leistringrequired“LEI”
gleif__ultimate-parentreads or searches
“The ultimate accounting parent of an entity.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- leistringrequired“LEI”
gleif__direct-childrenreads or searches
“Entities directly owned by this entity.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- leistringrequired“LEI”
gleif__branchesreads or searches
“Registered branches of an entity.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- leistringrequired“LEI”
gleif__by-isinreads or searches
“Which entity issued a security, by ISIN.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- isinstringrequired“ISIN”
gleif__by-bicreads or searches
“Which entity holds a SWIFT/BIC code.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- bicstringrequired“BIC”
gleif__isinsreads or searches
“Securities (ISINs) issued by an entity.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- leistringrequired“LEI”
sanctions__screen-ukreads or searches
“Potential matches on the UK Sanctions List only (FCDO).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs, 1 required
- namestringrequired“Name”
- thresholdinteger“Minimum score (default 80)”

Show 46 more tools

sanctions__screen-usreads or searches
“Potential matches on the US OFAC SDN list only.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs, 1 required
- namestringrequired“Name”
- thresholdinteger“Minimum score (default 80)”
sanctions__entryreads or searches
“Full record for a matched entry: all aliases, programmes, countries, dates of birth and remarks.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
3 inputs
- liststring“us-ofac, uk, eu or un”
- list_idstring“The list's own id (list_id in a screen result)”
- entry_idinteger“Or entry_id from a screen result”
sanctions__listsreads or searches
“Which lists are mirrored, entry counts, list dates and last sync time.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
Takes no inputs.
sanctions__screenreads or searches
“Potential matches across all four lists with score, list, programmes, countries and dates of birth.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
6 inputs, 1 required
- namestringrequired“Person, company or vessel name”
- typestring“individual, entity or vessel”
- birth_yearinteger“Birth year to corroborate”
- countrystring“Country to corroborate”
- listsstring“Comma list: us-ofac,uk,eu,un (default all)”
- thresholdinteger“Minimum score 50-100 (default 80)”
sanctions__wallet-screenreads or searches
“Whether a crypto address (BTC, ETH/EVM, TRX, USDT and others) is listed against a designated party on the OFAC SDN list.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- addressstringrequired“Wallet address”
companies-house__alphabetical-searchreads or searches
“Companies listed alphabetically around a name — good for name-availability checks.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- qstringrequired“Name”
companies-house__dissolved-searchreads or searches
“Search dissolved and removed companies by name.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- qstringrequired“Name”
companies-house__profilereads or searches
“Status, type, incorporation date, SIC codes, accounts and confirmation statement due dates, registered office.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- company_numberstringrequired“8-character company number, e.g.”
companies-house__registered-officereads or searches
“Current registered office address.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- company_numberstringrequired“8-character company number, e.g.”
companies-house__filing-historyreads or searches
“Accounts, confirmation statements, appointments and other filings, newest first.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs, 1 required
- company_numberstringrequired“8-character company number, e.g.”
- categorystring“accounts, confirmation-statement, officers, capital, mortgage…”
companies-house__filingreads or searches
“One filing's detail and document link.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs, 2 required
- company_numberstringrequired“8-character company number, e.g.”
- transaction_idstringrequired“Transaction id from filing history”
companies-house__chargesreads or searches
“Mortgages and charges registered against a company, with lenders and status.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- company_numberstringrequired“8-character company number, e.g.”
companies-house__insolvencyreads or searches
“Insolvency cases, practitioners and key dates for a company.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- company_numberstringrequired“Company number”
companies-house__exemptionsreads or searches
“PSC disclosure exemptions a company holds.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- company_numberstringrequired“Company number”
companies-house__uk-establishmentsreads or searches
“UK branches of an overseas company.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- company_numberstringrequired“Overseas company number (FC…)”
companies-house__searchreads or searches
“Find UK companies by name or number, with status, address and incorporation date.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- qstringrequired“Company name or number”
companies-house__advanced-searchreads or searches
“Filter companies by name, status, SIC code, location and incorporation dates.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
6 inputs
- company_name_includesstring“Name contains”
- company_statusstring“active, dissolved, liquidation…”
- sic_codesstring“SIC code”
- locationstring“Town, county or postcode area”
- incorporated_fromstring“YYYY-MM-DD”
- incorporated_tostring“YYYY-MM-DD”
uk-business__due-diligencereads or searches
“Register profile plus risk flags: status, overdue accounts or confirmation statement, late accounts, insolvency history, Gazette notices, recent name/office changes, LEI and sanctions name screen.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- company_numberstringrequired“8-character Companies House number, e.g.”
uk-disputes__complaints-contactreads or searches
“Verified complaints address, email, phone and URL for a UK company (energy, telecoms, water, finance…).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- organisationstringrequired“Company name”
uk-disputes__organisationsreads or searches
“Organisations in the complaints directory, private parking operators and UK councils (with London flag).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
Takes no inputs.
uk-disputes__energy-complaintreads or searches
“Back-billing (12-month rule) check, Ombudsman timeline and cited rules for a UK energy complaint.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
4 inputs
- supplierstring“Supplier”
- bill_datestring“Date of the catch-up bill YYYY-MM-DD”
- charges_fromstring“Earliest date the bill charges for”
- complained_onstring“Date of first complaint”
uk-disputes__telecoms-complaintreads or searches
“ADR timeline (6 or 8 weeks), price-rise rules and penalty-free exit window for a UK telecoms complaint.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
4 inputs
- providerstring“Provider”
- complained_onstring“Date of first complaint”
- contract_startstring“Contract start YYYY-MM-DD”
- change_notified_onstring“Date a price/contract change was notified”
uk-disputes__water-complaintreads or searches
“Two-stage complaint, CCW referral and Guaranteed Standards Scheme timeline (England & Wales).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs
- companystring“Water company”
- complained_onstring“Date of first complaint”
uk-disputes__parking-appealreads or searches
“Council PCN or private charge: route, deadlines, grounds, tribunal, cited law and strategy.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
6 inputs, 2 required
- typestringrequired“council or private”
- issued_onstringrequired“YYYY-MM-DD”
- issuerstring“Council or operator name”
- ticket_kindstring“parking, box_junction, bus_lane (council)”
- groundstring“Ground key (see response)”
- amountstring“Charge £”
uk-disputes__consumer-chargereads or searches
“Subscription, gym, retailer or tradesperson charge: rules that apply (Consumer Rights Act 2015), what to ask for, and the escalation ladder to a small claim.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
4 inputs, 1 required
- categorystringrequired“subscription, gym, retailer, tradesperson, other_consumer (regulated: credit_card, bank, insurance…)”
- companystring“Who charged you”
- amountstring“Disputed amount £”
- complained_onstring“Date you complain (default today) YYYY-MM-DD”
uk-gazette__noticereads or searches
“Structured detail for one deceased-estates notice: address, date of death, executor and claim deadline.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- notice_idstringrequired“Gazette notice id from a search result”
uk-gazette__deceased-estatesreads or searches
“Search UK deceased-estates notices by the deceased's name, optionally narrowed to a year of death.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
3 inputs, 1 required
- namestringrequired“Name of the deceased, e.g.”
- death_yearinteger“Year of death, e.g.”
- limitinteger“Max results (1-50, default 20)”
uk-legislation__itemreads or searches
“Title, long title, enactment/made date, status, extent, count of outstanding changes and the full table of contents.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
3 inputs, 3 required
- typestringrequired“Legislation type code (ukpga, uksi, asp, ssi, wsi, nisr…; see types)”
- yearstringrequired“Year (or regnal year for pre-1963, e.g.”
- numberintegerrequired“Chapter or SI number”
uk-legislation__changesreads or searches
“Most recent 50 changes (substitutions, repeals, insertions…) made by later legislation, with the amending provision, in-force dates and whether the change is reflected in the text yet.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
3 inputs, 3 required
- typestringrequired“Legislation type code (ukpga, uksi, asp, ssi, wsi, nisr…; see types)”
- yearstringrequired“Year (or regnal year for pre-1963, e.g.”
- numberintegerrequired“Chapter or SI number”
uk-legislation__latestreads or searches
“The newest Acts and instruments published, optionally of one type.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input
- typestring“Type code”
uk-legislation__typesreads or searches
“Type codes and what they mean.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
Takes no inputs.
uk-legislation__searchreads or searches
“Find Acts and instruments by title words or full text, optionally by type and year.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
5 inputs
- titlestring“Words in the title”
- textstring“Words anywhere in the text”
- typestring“Type code (see types)”
- yearinteger“Year”
- pageinteger“Results page (20 per page)”
uk-legislation__provisionreads or searches
“Plain numbered text of one section, regulation, article or schedule paragraph, as it stands today or on a past date, with amendment and commencement notes.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
5 inputs, 4 required
- typestringrequired“Legislation type code (ukpga, uksi, asp, ssi, wsi, nisr…; see types)”
- yearstringrequired“Year (or regnal year for pre-1963, e.g.”
- numberintegerrequired“Chapter or SI number”
- provisionstringrequired“Path such as section/3, regulation/2, article/5 or schedule/1/paragraph/4”
- datestring“Point in time, YYYY-MM-DD (default: current revised text)”
uk-tenders__searchon 1 other serverreads or searches
“Contracts Finder notices by keyword, status (open, closed, awarded, withdrawn), type and publication date, optionally above a minimum value.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
7 inputs
- qstring“Keywords (title, description, buyer, supplier)”
- statusstring“open, closed, awarded or withdrawn”
- typestring“contract, pipeline, early-engagement or future-opportunity”
- published_fromstring“YYYY-MM-DD”
- published_tostring“YYYY-MM-DD”
- min_valueinteger“Minimum value in £”
- limitinteger“Max results (default 20, max 50)”
uk-tenders__noticeon 1 other serverreads or searches
“One notice in full: description, CPV codes, contract dates, procedure and awards (supplier, value, dates).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- idstringrequired“Contracts Finder GUID or Find a Tender notice number”
uk-tenders__supplier-awardson 1 other serverreads or searches
“Contracts Finder awards won by a supplier (name match), newest first, with total value.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs, 1 required
- supplierstringrequired“Supplier name (matched as a phrase)”
- published_fromstring“YYYY-MM-DD”
uk-tenders__find-a-tender-lateston 1 other serverreads or searches
“Above-threshold UK notices published or updated on Find a Tender in the last 1–7 days, by stage (planning, tender, award), optionally filtered by keyword.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
4 inputs
- daysinteger“Look back 1–7 days (default 3)”
- stagestring“planning, tender (default) or award”
- qstring“Keyword filter on title, description and buyer”
- limitinteger“Max results (default 20, max 50)”
uk-trade-tariff__searchon 1 other serverreads or searches
“Candidate commodity codes, headings and chapters for a product description ("roasted coffee", "lithium battery"), best match first.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs, 1 required
- qstringrequired“Product description”
- limitinteger“Max results (default 15, max 30)”
uk-trade-tariff__commodityon 1 other serverreads or searches
“One commodity code: description, section/chapter/heading, third-country duty and every import/export measure (preferential rates, VAT, additional duties, controls with document codes).”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs, 1 required
- codestringrequired“Commodity code, 6–10 digits (padded to 10), e.g.”
- countrystring“Country of origin, ISO alpha-2 (e.g.”
uk-trade-tariff__headingon 1 other serverreads or searches
“A 4-digit heading and every commodity code under it, with indents and whether each is declarable.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- codestringrequired“4-digit heading, e.g.”
uk-trade-tariff__quotason 1 other serverreads or searches
“Quota definitions with status (open, exhausted, critical), initial volume, remaining balance and validity, by order number or country of origin.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
4 inputs
- order_numberstring“6-digit quota order number”
- countrystring“Country of origin, ISO alpha-2”
- statusstring“open, exhausted, blocked, critical or not_exhausted”
- pageinteger“Page”
uk-trade-tariff__areason 1 other serverreads or searches
“Tariff geographical areas: countries and the groups used in measures (e.g.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
2 inputs
- kindstring“all, countries or groups”
- qstring“Filter by name or id”
uk-trade-tariff__exchange-rateson 1 other serverreads or searches
“HMRC's monthly exchange rates used to convert invoice values for customs and import VAT, units per £1.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
3 inputs, 2 required
- yearintegerrequired“Year”
- monthintegerrequired“Month 1–12”
- currencystring“ISO currency code, e.g.”
vat__rateson 1 other serverreads or searches
“Standard, reduced and super-reduced VAT rates for one country or all of EU27 + UK, with the date they were checked.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input
- countrystring“ISO code (omit for all)”
vat__calculateon 1 other servercalculates or converts
“Net to gross or gross to net at a given rate, or at a country's standard rate.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
4 inputs, 1 required
- amountstringrequired“Amount”
- ratestring“VAT rate in percent (or give country)”
- countrystring“Use this country's standard rate”
- fromstring“net (default) or gross”
vat__validate-formaton 1 other servercalculates or converts
“Country format and check digit for UK (GB/XI) and EU VAT numbers.”
Publisher declares: read-only yes · destructive no · idempotent yes · open-world yes
1 input, 1 required
- vat_numberstringrequired“VAT number with country prefix”

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 58 tools
Says what it returns: 100% of 58 tools
States limits, defaults or errors: 100% of 58 tools
Says when to use it: 0% of 58 tools
Items covered per tool: 3.0 of 4 on average

Counted from the listing

Parameters with a description: 100% of 121
Tools with a description: 100% of 58
Typical description length: 156 characters

The tool set

Counted from the listing

Tools: 58
Size of the list: about 10,883 tokens for an agent to load (characters ÷ 4)
Naming: 58 of 58 names use mixed or other styles

AI reading: easy to mix up

No pair found.

The AI items cover 58 of 58 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://fourzerotwo.si/mcp/v/uk-business

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

{
  "mcpServers": {
    "uk-business": {
      "url": "https://fourzerotwo.si/mcp/v/uk-business"
    }
  }
}

VS Code · .vscode/mcp.json

{
  "servers": {
    "uk-business": {
      "type": "http",
      "url": "https://fourzerotwo.si/mcp/v/uk-business"
    }
  }
}

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

code --add-mcp '{"name":"uk-business","type":"http","url":"https://fourzerotwo.si/mcp/v/uk-business"}'

Claude Code

claude mcp add --transport http uk-business https://fourzerotwo.si/mcp/v/uk-business

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://fourzerotwo.si/mcp/v/uk-business --transport http

Optional settings the entry also lists (left out above): X-API-Key.
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 fourzerotwo.si/mcp/v/uk-business	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

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 2026-10-23. 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 si.fourzerotwo/uk-business

Answered from the data above

Is si.fourzerotwo/uk-business free to use?

Its website (fourzerotwo.si/) describes a usage-based 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 si.fourzerotwo/uk-business 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 si.fourzerotwo/uk-business been security tested?

Partly. 2 of the 14 checks that apply to it were exercised. We connected and read what the server declares, but did not call its tools: ProtocolProbe calls no server's tools for anything it publishes. This is our choice, not a block by the server. No security verdict is published before verification.

What can si.fourzerotwo/uk-business do?

It lists 58 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 and calculate or convert. We did not call any tool, so this describes the text, not the behaviour.

Can si.fourzerotwo/uk-business change or delete data?

None of its 58 tools is described as changing anything (our AI model's reading of the descriptions; nobody checked it by hand). We did not call any tool.

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 “data-and-databases” 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

Not probed (we call no server's tools)

We connected and read what the server declares, but did not call its tools: ProtocolProbe calls no server's tools for anything it publishes. This is our choice, not a block by the server. 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: not run · nothing to check it against
Fake assistant turns: not applicable
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

2 exercised12 not run (reason given)4 not applicable

Each check ends in exactly one state: exercised, not run (with the reason), or not applicable (with the reason). 2 of the 14 checks that apply to it were exercised. We do not publish security-check outcomes for named servers.

Exercised · 2

1Inventory
tool-listReads the declared tools, resources and prompts.exercised
2Hidden instructions
description-poisoningLooks for hidden instructions in tool descriptions.exercised

Not run, with the reason · 12

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
12Hidden content
audience-hidingChecks resources that hide content from the user.This check needs content the server returns, and nothing was read or 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 · 4

13Fake assistant turns
fake-assistant-turnChecks prompts that pose as the assistant's own words.The server exposes no prompts.not applicable
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
579 msConnected after 0 redirects. No credential was sent or needed.
Read the inventory: 58 tools, 0 resources, 0 prompts.
4,079 msFinished: 2 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

data-and-databases

AI-classified · 2026-10-23

Pricing modelAI-classified

usage-based

read from fourzerotwo.si/ · 2026-10-23

“You pay per call and nothing else.”

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

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

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. “si.fourzerotwo/uk-business: MCP server record.” Data checked 2026-10-23. https://protocolprobe.com/mcp/servers/si.fourzerotwo/uk-business

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/si.fourzerotwo/uk-business)](https://protocolprobe.com/mcp/servers/si.fourzerotwo/uk-business)

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