Is the UK Data: UK due diligence MCP server safe?

No scan can promise that. What its definitions show: 5 tools, 4 of which can change, send or delete something, and 0 findings from fixed checks. Allow the reads, ask before each change, and deny the deletes; the permissions block on this page does that.

Can the UK Data: UK due diligence MCP server delete data?

No tool is classed as destructive: going by their definitions, none of them deletes, cancels or revokes anything.

Can the UK Data: UK due diligence MCP server do things that cannot be undone?

No tool is classed as irreversible: none of them sends, pays, publishes or merges, going by their definitions.

What tools does the UK Data: UK due diligence MCP server have?

5 tools: 4 write, 1 read. company_accounts, fca_firm, fca_individual, charity_profile and charity_search.

Does the UK Data: UK due diligence MCP server need sign-in or OAuth?

Its remote endpoint listed its tools to an anonymous client, without sign-in.

Does the UK Data: UK due diligence MCP server send data to outside services?

None of its tools sends, posts or publishes, or takes a recipient, channel or URL.

Has the UK Data: UK due diligence MCP server changed its tools?

Not since anlyon.dev started tracking it. Last scanned Nov 7, 2026.

UK Data: UK due diligence MCP server

uk.co.reliness/uk-due-diligencereliness.co.ukstreamable-httpv1.5.0Scanned 8 days ago

UK due diligence: filed accounts figures, FCA register checks on firms and people, charities

5 tools: 4 change things and 1 only read.

Reads private data · 0
Reads text others write · 5
Can send data out · 0
No findings

Tools listed without sign-in. Remote posture

With Anlyon

4 tools here change things. Govern them.

Anlyon lists the tools and adopts none.
Each tool you adopt gets approvals and receipts.
Your agent never holds the key.

Govern this server →

A tool your agent calls directly is not routed through Anlyon and is not governed by it. anlyon.dev only lists and labels, and these labels are the same either way.

What the UK Data: UK due diligence MCP server can do

The UK Data: UK due diligence MCP server is published by reliness.co.uk, a domain the MCP Registry verified. It has 5 tools. It can create or change data (4 tools: company_accounts, fca_firm, fca_individual and charity_profile), but cannot delete data. 1 tool only reads.

5 tools bring in text other people can write (company_accounts, fca_firm, fca_individual and 2 more).

None of the fixed checks matched anything in its tool definitions. That is not a safety guarantee.

Its remote endpoint lists its tools without sign-in.

Last scanned Nov 7, 2026, version 1.5.0.

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

5 tools

Changes things 4Creates or changes something that can be changed back.Claude Code: ask

charity_profileFull profile of a charity in England and Wales by charity number: status, what it does, address and contacts, latest income and spending, staff, volunteers, trustees and five years…Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Full profile of a charity in England and Wales by charity number: status, what it does, address and contacts, latest income and spending, staff, volunteers, trustees and five years of income history. (cost: 2 credits)
Annotations the server declares
- title: charity profile
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
company_accountsHeadline figures from a UK company's latest filed accounts at Companies House: net assets, cash, debtors, creditors, employees and, where published, turnover and profit, with the p…Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Headline figures from a UK company's latest filed accounts at Companies House: net assets, cash, debtors, creditors, employees and, where published, turnover and profit, with the prior year for comparison. Works for most small and medium companies that file digital accounts; large companies and groups usually file PDF only, and then the tool says so and links the filing. Use for supplier and credit checks: is it solvent, how much cash, is it growing. (cost: 3 credits)
Annotations the server declares
- title: company accounts
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
fca_firmFull FCA register check on a financial firm by firm reference number (FRN) or name: authorisation status, what it is permitted to do, trading names, addresses and complaints contac…Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Full FCA register check on a financial firm by firm reference number (FRN) or name: authorisation status, what it is permitted to do, trading names, addresses and complaints contact, regulators, client money, and any fines or enforcement history. Use before dealing with a bank, lender, broker, adviser, insurer or investment firm, and to spot cloned firms. (cost: 2 credits)
Annotations the server declares
- title: fca firm
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
fca_individualFCA register check on a person by individual reference number: approval status, current and past regulated roles and the firms they hold them at, and any disciplinary history.Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
FCA register check on a person by individual reference number: approval status, current and past regulated roles and the firms they hold them at, and any disciplinary history. Use to check a financial adviser, mortgage broker or senior manager. (cost: 1 credit)
Annotations the server declares
- title: fca individual
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

Only reads 1Looks things up and changes nothing.Show 1 read-only tool

charity_searchFind a registered charity in England and Wales by name and get its charity number, status and registration date.Reads text others writeNo findings
Why it is in this group
- The name "charity_search" says "search": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Find a registered charity in England and Wales by name and get its charity number, status and registration date. Use to check a charity is real before donating, partnering or paying it. (cost: 1 credit)
Annotations the server declares
- title: charity search
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write5: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; charity_profile
charity_search
company_accounts
fca_firm
fca_individual
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Nov 14, 2026, 12:24 UTC, unchanged since Nov 7, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable: yes
HTTP status of an anonymous initialize: 200
tools/list served without credentials: yes
Tools that change things, listed without credentials: 4
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: not observed
RFC 9728 protected resource metadata: not observed
Authorization servers: not observed
Legacy HTTP+SSE transport: no
Dynamic client registration: not observed
Client ID metadata documents: not observed

WarnThe whole server
The endpoint served tools/list without credentials, and the list has 4 tools that change things (4 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://ukdata.reliness.co.uk/mcp/uk-due-diligence: tools/list returned 5 tools to an anonymous client, including company_accounts (write), fca_firm (write), fca_individual (write), charity_profile (write)
What this check looks for

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.5.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http uk-due-diligence https://ukdata.reliness.co.uk/mcp/uk-due-diligence

claude mcp add --transport http uk-due-diligence https://ukdata.reliness.co.uk/mcp/uk-due-diligence

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__uk-due-diligence__charity_search"
    ],
    "ask": [
      "mcp__uk-due-diligence__company_accounts",
      "mcp__uk-due-diligence__fca_firm",
      "mcp__uk-due-diligence__fca_individual",
      "mcp__uk-due-diligence__charity_profile"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as uk-due-diligence. Review it before you use it.

Capability tags behind 5 rules

mcp__uk-due-diligence__company_accounts untrusted-input
mcp__uk-due-diligence__fca_firm untrusted-input
mcp__uk-due-diligence__fca_individual untrusted-input
mcp__uk-due-diligence__charity_search untrusted-input
mcp__uk-due-diligence__charity_profile untrusted-input

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/uk.co.reliness/uk-due-diligence/verify?hash=be019eb19b847dcf9a59279b48bd0f81f2b0f9a0cb9b110c9d83ab9fb350b788" | jq -e '.changed == false'

Pinned hash be019eb19b84, from Nov 7, 2026, 00:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/uk.co.reliness/uk-due-diligence/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

[![anlyon.dev](https://anlyon.dev/badge/uk.co.reliness/uk-due-diligence.svg)](https://anlyon.dev/servers/uk.co.reliness/uk-due-diligence)

Source: MCP Registry. Synced Nov 7, 2026, 00:18 UTC.