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UK Due Diligence

REMOTE · UK-DUE-DILIGENCE-MCP.FLY.DEV · 2 COMPONENTS · SCANNED SEP 20

UK due diligence — Companies House, Charity Commission, Land Registry, Gazette, HMRC VAT

−1 this week 81 Trust /100
Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security74
Transport & Reachability100
Schema Quality & AI Usability70
  • AI-judged instruction clarity (excellent).Pass
  • Context-footprint check failed: tool/resource definitions use about 3446 tokens (~191/item across 18 items; 18 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management78
  • Stability check failed: schema churn in the 29 days we've observed: 3 tool removals, 0 breaking changes, 0 auth/transport breaks, 4 additions. See how to fix → Fail
Tool Coverage100
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 100% of tool parameters carry a description.Pass
  • Structured output schemas are declared (94% of tools); any adoption earns full credit.Pass
Tool Safety100
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • We read all 18 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
  • An AI judge read all 19 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Install

How do I install the UK Due Diligence MCP server?

UK Due Diligence is a hosted endpoint at https://uk-due-diligence-mcp.fly.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · uk-due-diligence-mcp.fly.dev

# add to Claude Code
claude mcp add --transport http paulieb89-uk-due-diligence-mcp 'https://uk-due-diligence-mcp.fly.dev/mcp'
// .cursor/mcp.json
{
  "mcpServers": {
    "paulieb89-uk-due-diligence-mcp": {
      "url": "https://uk-due-diligence-mcp.fly.dev/mcp"
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "paulieb89-uk-due-diligence-mcp": {
      "type": "http",
      "url": "https://uk-due-diligence-mcp.fly.dev/mcp"
    }
  }
}
# ~/.codex/config.toml
[mcp_servers.paulieb89-uk-due-diligence-mcp]
url = "https://uk-due-diligence-mcp.fly.dev/mcp"
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "paulieb89-uk-due-diligence-mcp": {
      "type": "remote",
      "url": "https://uk-due-diligence-mcp.fly.dev/mcp",
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add paulieb89-uk-due-diligence-mcp --url 'https://uk-due-diligence-mcp.fly.dev/mcp' --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  paulieb89-uk-due-diligence-mcp:
    url: "https://uk-due-diligence-mcp.fly.dev/mcp"
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "paulieb89-uk-due-diligence-mcp": {
      "Transport": "http",
      "Url": "https://uk-due-diligence-mcp.fly.dev/mcp"
    }
  }
}
# add to Vellum
assistant mcp add paulieb89-uk-due-diligence-mcp -t streamable-http -u 'https://uk-due-diligence-mcp.fly.dev/mcp'
// mcp.json
{
  "mcpServers": {
    "paulieb89-uk-due-diligence-mcp": {
      "type": "http",
      "url": "https://uk-due-diligence-mcp.fly.dev/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 20 Sept 26 −1

    No change was recorded against any check on this day. Stability & Change Management went from 82 to 78.

  • 10 Sept 26 −1
    • A breaking change shipped without a version bump: still 3.2.4 security
    • Tool “vat_validate” was removed security
    • The server rewrote its instructions, which are the text every model session reads security
  • 4 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 84 to 88.

  • 3 Sept 26 −1

    No change was recorded against any check on this day. Stability & Change Management went from 88 to 84.

  • 26 Aug 26 +1
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 25 Aug 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 84 to 88.

  • 24 Aug 26 +2
    • Stability: 0.93 → fail security
    • A breaking change shipped without a version bump: still 3.2.4 security
    • Tool “get_prompt” was removed security
    • Tool “list_prompts” was removed security
    • Authorization: unverified → partial security
    • The server rewrote its instructions, which are the text every model session reads security
    • Tool “charity_search” rewrote its description, which is the text the model reads security
    • Tool “company_officers” rewrote its description, which is the text the model reads security
    • Tool “gazette_insolvency” rewrote its description, which is the text the model reads security
    • Tool coverage: 100% → 95% functional
    • Schema quality: 139 → 189 functional
    • Prompt “charity_due_diligence” was removed functional
    • Prompt “director_check” was removed functional
    • Prompt “due_diligence” was removed functional
    • New tool “officer_appointments” functional
    • New tool “company_charges” functional
    • New tool “company_filing_document” functional
    • New tool “company_filing_history” functional
    • “company_officers” added an optional parameter “include_resigned” cosmetic
    • “company_officers” reworded the description of “start_index” cosmetic
    • “gazette_insolvency” reworded the description of “notice_type” cosmetic
  • 23 Aug 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 20 Sept 2026 · Probed https://uk-due-diligence-mcp.fly.dev/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=*.fly.dev CN=YE1,O=Let's Encrypt,C=US 21 Aug 2026 19 Nov 2026 ECDSA 256 ECDSA-SHA384 688c4daf5300c51e0a5c1f6837a3a67a868
SANs: *.fly.dev
CN=YE1,O=Let's Encrypt,C=US (CA) CN=Root YE,O=ISRG,C=US 3 Sept 2025 2 Sept 2028 ECDSA 384 ECDSA-SHA384 5ddd70dd31f801c85c186a7a04b80afe
CN=Root YE,O=ISRG,C=US (CA) CN=ISRG Root X2,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 ECDSA-SHA384 872165fc34b6e5fba8add5b3705fb53a
CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) CN=ISRG Root X1,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 SHA256-RSA 6c8f1dc727c7117f7baf853ac980f9cd

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of uk-due-diligence-mcp.fly.dev. Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
dev. present 60074 8 Verified
fly.dev. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://uk-due-diligence-mcp.fly.dev/mcp Verified 200
http (plaintext) http://uk-due-diligence-mcp.fly.dev/mcp HTTPS enforced 301 https://uk-due-diligence-mcp.fly.dev/mcp
MCP tools · 18 exposed · ~2,969 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
charity_profile ~79

Fetch the full Charity Commission profile for a charity number. Returns trustees, latest income/expenditure, insolvency flags, governing document type, classifications, and countries of operation. Use charity_search first to find the charity number.

NameTypeReqDescription
charity_numberstringyesCharity Commission registration number (e.g. '1234567'). Returned by charity_search.
NameTypeReqDescription
addressRegistered address of the charity (joined address lines).
charity_co_reg_numberCompanies House number for charities also registered as companies (Charitable Incorporated Organisations, etc.).
charity_nameRegistered charity name.
charity_numberstringyesCharity registration number.
charity_typeCharity type.
countries_of_operationarrayCountries the charity operates in (capped at 10 upstream).
date_of_registrationDate of first registration.
in_administrationbooleanTrue if the charity is in administration.
insolventbooleanTrue if the charity is flagged as insolvent.
latest_expenditureLatest filed annual expenditure in GBP.
latest_incomeLatest filed annual income in GBP.
reg_statusRegistration status code ('R', 'RM').
reg_status_labelHuman-readable registration status.
trustee_namesarrayTrustees on record. Truncated to 30 entries.
trustee_names_totalintegerTotal trustees upstream before truncation.
trustee_names_truncatedbooleanTrue if the trustee list was truncated.
who_what_wherearrayWho/What/Where classification entries. The list may be truncated truncated to 50 entries.
who_what_where_totalintegerTotal classification entries upstream before truncation.
who_what_where_truncatedbooleanTrue if the classification list was truncated.

No examples provided.

charity_search ~196

Search the Charity Commission register of England and Wales by name or keyword. Returns matching charities with registration number, status, and registration date. Use charity_profile for full details once you have the charity number. The upstream `searchCharityName` endpoint returns the full list in one shot — pagination is applied client-side via offset/limit. A query that matches nothing is a successful empty result (`charities: []`), not an error — the upstream endpoint signals "no matches" with an HTTP 404, which is translated back into an empty result here rather than surfaced as a not-found failure.

NameTypeReqDescription
limitintegerMax items to return in this page. Default 20; raise to 100 for bulk views.
offsetintegerNumber of items to skip before this page. Default 0.
querystringyesCharity name or keyword to search for
NameTypeReqDescription
charitiesarrayMatching charity records.
has_morebooleanyesTrue if more items may exist beyond this page. Re-call with offset=offset+returned to continue.
limitintegeryesMax items requested for this page.
offsetintegeryesNumber of items skipped before this page (client-side).
querystringyesSearch term applied.
returnedintegeryesItems actually returned on this page.
totalintegeryesTotal matches returned by upstream.

No examples provided.

company_charges ~155

Fetch the complete Companies House charge history for a company. Returns every registered charge (secured debt) — current and historic — with status, dates, secured parties, and what each charge covers (fixed/floating/negative-pledge flags and any free-text particulars). Satisfaction is represented as satisfied_on plus a charge-satisfaction filing entry, not a separate 'release' record. company_profile.has_charges is a True/False/unknown summary derived from this same data; use this tool when the specific charges matter, not just whether any exist.

NameTypeReqDescription
company_numberstringyesCompanies House company number (8 digits, e.g. '03782379'). Returned by company_search.
NameTypeReqDescription
chargesarrayEvery charge, current and historic.
company_numberstringyesCompanies House company number.
part_satisfied_countUpstream count of part-satisfied charges, or null if not provided.
satisfied_countUpstream count of satisfied charges, or null if not provided.
total_countintegeryesTotal charges returned.
unfiltered_countUpstream unfiltered charge count, or null if not provided.

No examples provided.

company_filing_document ~266

Resolve a filing's document_metadata link to its authoritative source document. Returns a resource_link (never embedded bytes, never base64) pointing at a company-document:// MCP resource — fetch it via resources/read to get the actual PDF. This tool only reads metadata (category, pages, available content types, byte size); it never downloads the document itself. Use company_filing_history first to find a filing's document_metadata URL. Requires a resource-capable MCP client to retrieve the actual bytes — a tool-only client can see this result's metadata (company, category, page count, size) but cannot obtain the file through this tool call alone.

NameTypeReqDescription
document_metadata_urlstringyesThe document_metadata URL from a filing's links.document_metadata (returned by company_filing_history) — pass it through verbatim, not a document_id. Must be an exact https://document-api.company-inf…
mime_typeWhich content representation to select, e.g. 'application/pdf'. Omit when the document has only one representation (the near-universal case) — it is auto-selected. Required if the document has more t…

No output schema declared.

No examples provided.

company_filing_history ~437

Fetch one page of a company's Companies House filing chronology. Returns the raw source facts for each filing — transaction ID, form type/category, dates, and the description_values CH uses to render its own text — as delivered upstream, not interpreted into DD conclusions. links.document_metadata on each filing is the identifier a future document-retrieval tool would need; no document content is fetched here. Unlike company_officers/company_psc/company_charges, this does NOT auto-fetch every page — a long-lived company's filing history is unbounded in practice (a decades-old PLC can carry thousands of filings). total_count/returned/has_more are always reported truthfully for whatever page and category filter was requested; nothing is silently truncated. Narrow with category= for a specific slice (e.g. category='mortgage' for charge-related filings, category='insolvency' for administration/liquidation filings) — a note is included when an unfiltered history is large. A company_number that doesn't resolve to any company returns a structured not_found error, distinct from a genuine zero-filing result — Companies House's filing-history endpoint alone cannot tell these apart, so existence is confirmed separately when the result would otherwise be empty.

NameTypeReqDescription
categoryFilter by CH filing category — comma-separated for multiple, e.g. 'mortgage' or 'mortgage,officers'. Omit for all categories. Common values: accounts, confirmation-statement, officers, address, capit…
company_numberstringyesCompanies House company number (8 digits, e.g. '03782379'). Returned by company_search.
items_per_pageintegerResults per page (Companies House caps at 100 regardless of a higher value). Default 100.
start_indexintegerPagination offset. Default 0. Re-call with start_index=start_index+returned while has_more is true.
NameTypeReqDescription
categoryThe category filter applied to this query, or null if unfiltered.
company_numberstringyesCompanies House company number.
filing_history_statusUpstream filing-history status (e.g. 'filing-history-available').
filingsarrayFilings on this page.
has_morebooleanyesTrue if start_index + returned < total_count.
items_per_pageintegeryesPage size actually used (CH caps at 100 regardless of a higher request).
noteAdvisory note, e.g. suggesting a category filter when total_count is large and no category was applied. Informational only — never a truncation.
returnedintegeryesFilings returned on this page.
start_indexintegeryesPagination offset used for this page.
total_countintegeryesTotal filings matching this query (across all pages).

No examples provided.

company_officers ~156

Fetch officers for a Companies House company number. Returns directors, secretaries, and other officers with appointment dates, nationality, and country of residence. Resigned officers are excluded by default; set include_resigned=true for historical DD. Pagination is handled internally.

NameTypeReqDescription
company_numberstringyesCompanies House company number (8 digits, e.g. '03782379'). Returned by company_search.
include_resignedbooleanInclude resigned/historic officers. Default false for backwards-compatible current-officer queries.
items_per_pageIgnored — pagination is handled internally. Only accepted to avoid call failures.
start_indexIgnored — pagination is handled internally. Only accepted to avoid call failures.
NameTypeReqDescription
company_numberstringyesCompanies House company number.
high_appointment_count_flagNumber of active officers with 10+ total appointments, or null if appointment counts were not fetched. Non-zero values are a nominee/phoenix director risk signal.
include_resignedbooleanyesWhether resigned officers were included in this result.
officersarrayOfficer records.
totalintegeryesTotal officers returned (filtered by include_resigned).

No examples provided.

company_profile ~87

Fetch the full Companies House profile for a company number. Returns status, registered address, SIC codes, filing compliance (overdue accounts and confirmation statement flags), and whether the company has outstanding charges. Use company_search first to find the company number.

NameTypeReqDescription
company_numberstringyesCompanies House company number (8 digits, e.g. '03782379'). Returned by company_search.
NameTypeReqDescription
accountsobjectAccounts filing status and due dates.
company_nameRegistered company name.
company_numberstringyesCompanies House company number.
company_statusCurrent status (active, dissolved, in liquidation, etc.).
company_typeCompanies House company type code.
confirmation_statementobjectConfirmation statement filing status and next due date.
date_of_creationIncorporation date (ISO YYYY-MM-DD).
has_chargesTrue if the company has at least one outstanding or part-satisfied charge (secured debt) — not yet fully discharged. False if every charge on record is fully satisfied, or there are none. Null if the…
registered_office_addressobjectRegistered office address as returned by Companies House.
sic_codesarrayStandard Industrial Classification codes.

No examples provided.

company_psc ~99

Fetch Persons with Significant Control (beneficial ownership) for a company. Returns PSC entries with natures of control, nationality, and country of residence. Flags overseas corporate PSC entries as a beneficial ownership risk signal. Returns an explanatory note for widely-held PLCs with no registrable PSC.

NameTypeReqDescription
company_numberstringyesCompanies House company number (8 digits, e.g. '03782379'). Returned by company_search.
NameTypeReqDescription
company_numberstringyesCompanies House company number.
noteExplanatory note when total=0. Typical for widely-held listed PLCs where no single person or entity holds 25%+ of shares or voting rights.
overseas_corporate_psc_flagintegerNumber of corporate PSCs registered outside the UK. Non-zero values indicate an offshore beneficial ownership chain.
pscarrayPersons with Significant Control records.
totalintegeryesTotal PSC entries returned for this company.

No examples provided.

company_search ~181

Search the Companies House register by company name or keyword. Returns a paginated list of matching companies with name, number, status, SIC codes, incorporation date, and registered address. Use company_profile for the full record once you have the company number. Re-call with start_index=start_index+items_per_page to fetch the next page.

NameTypeReqDescription
company_statusFilter by company status (e.g. 'active', 'dissolved'). Omit to search all.
company_typeFilter by company type (e.g. 'ltd', 'llp'). Omit to search all.
items_per_pageintegerNumber of results to return (max 100). Default 20.
querystringyesCompany name or keyword to search for
start_indexintegerPagination offset. Default 0.
NameTypeReqDescription
has_morebooleanyesTrue if more results exist beyond this page. Re-call with start_index=start_index+items_per_page to fetch the next page.
itemsarrayMatching companies. Use the `company_number` field to call company_profile, company_officers, or company_psc for full detail.
items_per_pageintegeryesPage size requested from the API for this call.
querystringyesThe query string that was searched.
returnedintegeryesNumber of items actually returned on this page.
start_indexintegeryesNumber of results skipped before this page (upstream start_index).
total_resultsintegeryesTotal matching companies in Companies House (server-side).

No examples provided.

disqualified_profile ~74

Fetch the full disqualification record for a director by officer ID. Returns all disqualification orders: reason, Act/section cited, disqualification period, and associated company names. Use disqualified_search first to find the officer ID.

NameTypeReqDescription
officer_idstringyesCompanies House officer ID. Returned by disqualified_search.
NameTypeReqDescription
date_of_birthDate of birth on record.
disqualificationsarrayAll disqualification orders attached to this officer.
forenameGiven name, if split upstream.
nameOfficer name.
nationalityDeclared nationality.
officer_idstringyesCompanies House officer ID looked up.
officer_kindstringyesWhich CH endpoint returned the record: 'natural' (individual) or 'corporate' (legal entity).
surnameFamily name, if split upstream.

No examples provided.

disqualified_search ~171

Check whether a named individual is banned from acting as a UK company director. Use this tool when asked to check disqualified, banned, or barred directors. Query must be an individual's name (e.g. "Richard Howson") — NOT a company name, which always returns zero results. Returns names, dates of birth, disqualification period snippets, and officer IDs that can be used with disqualified_profile for full details.

NameTypeReqDescription
items_per_pageintegerResults per page (max 100). Default 20.
nameAlias for query — the person's name.
queryPerson's name to search for, e.g. query='Richard Howson'. NOT a company name.
start_indexintegerPagination offset (0-based). Default 0.
NameTypeReqDescription
has_morebooleanyesTrue if more items may exist beyond this page. Re-call with start_index=start_index+items_per_page to continue.
itemsarrayMatching disqualified officer records.
items_per_pageintegeryesPage size requested.
querystringyesSearch query applied.
returnedintegeryesItems actually returned on this page.
start_indexintegeryesPagination offset for this page.
total_resultsintegeryesTotal matching records upstream at Companies House.

No examples provided.

fetch ~113

Fetch the full record for an ID returned by search. Routes by prefix to the appropriate register: - company:{number} → Companies House full profile - charity:{number} → Charity Commission full profile - disqualification:{officer_id} → Disqualified director full record - notice:{notice_id} → Gazette notice full legal text

NameTypeReqDescription
idstringyesPrefixed record ID returned by search. Format: company:{number}, charity:{number}, disqualification:{officer_id}, or notice:{notice_id}

Structured output declared, but exposes no named fields.

No examples provided.

gazette_insolvency ~274

Search The Gazette's insolvency notice index by entity name. Searches The Gazette's corporate-insolvency notice index using the authoritative Gazette notice-code taxonomy. Results are sorted by an internal DD severity score; the notice label itself remains a source fact. Each result includes a notice_numeric_id. Read the full legal wording via the notice://{notice_numeric_id} resource. The Gazette is the official UK public record. A notice here means the event has been formally published and is legally effective.

NameTypeReqDescription
end_dateFilter notices up to this date (YYYY-MM-DD)
entity_nameDeprecated alias for name.
max_noticesintegerCap on notices returned, applied after severity/date sort. Default 20. The Gazette insolvency feed returns up to 100 results per search — raise to 100 to see the full set.
nameCompany or individual name to search for in Gazette insolvency notices
notice_typeFilter by Gazette notice code (e.g. '2450' petition to wind up a company, '2452' winding-up order, '2410' appointment of administrators). Omit to search all.
queryAlias for name.
start_dateFilter notices from this date (YYYY-MM-DD)
NameTypeReqDescription
end_dateUpper bound of the date range filter, if any.
entity_namestringyesEntity name that was searched.
max_notices_capintegeryesThe max_notices cap applied. Upstream may have more matching notices.
notice_type_filterNotice code filter applied, or null if all codes searched.
noticesarrayMatching notices, sorted by severity (desc) then date (desc).
start_dateLower bound of the date range filter, if any.
total_noticesintegeryesTotal notices returned after deduplication, sorting, and cap.

No examples provided.

gazette_notice ~86

Fetch the full legal wording of a Gazette notice by numeric notice ID. Returns the complete JSON-LD linked-data record for the notice: parties, legal basis, court, and full text. Use gazette_insolvency first to find notice_numeric_id values.

NameTypeReqDescription
notice_idstringyesNumeric Gazette notice ID. Returned as notice_numeric_id by gazette_insolvency.

Structured output declared, but exposes no named fields.

No examples provided.

land_title_search ~118

Search HM Land Registry Price Paid Index by postcode or address. Returns up to 10 recent sale transactions for the postcode: price, date, address, property type, and tenure (Freehold/Leasehold). Covers England and Wales only. Postcode gives the most reliable results — a full address is also accepted and the postcode is extracted automatically.

NameTypeReqDescription
address_or_postcodestringyesUK property address or postcode. Postcode is most reliable: e.g. 'NG1 1AB'. Full address also accepted.
NameTypeReqDescription
postcodestringyesNormalised UK postcode extracted from the input.
totalintegeryesNumber of Price Paid transactions returned. Capped at 10 by the upstream SPARQL query.
transactionsarrayRecent Price Paid transactions for the postcode, sorted newest first.

No examples provided.

officer_appointments ~133

Fetch a person's full company appointment history by officer ID. Returns every appointment — current and historic — with each company's number, name, status, role, and appointment/resignation dates. Use company_officers first to find an officer_id, then this tool to discover other companies that person has been a director or secretary of, including dissolved or insolvent ones not mentioned anywhere else. Always returns full history; there is no current-only filter, since historical discovery is the point.

NameTypeReqDescription
officer_idstringyesCompanies House officer ID. Returned as officer_id on entries from company_officers.
NameTypeReqDescription
active_countUpstream count of appointments Companies House categorizes as 'active' — this reflects the officer's own appointment/resignation state at that company, NOT whether the company itself is currently tra…
appointmentsarrayEvery appointment, current and historic.
date_of_birthobjectPartial date of birth (month/year), or empty if not disclosed upstream.
inactive_countUpstream count of appointments Companies House categorizes as 'inactive', passed through as-is. Exact categorization semantics have not been independently verified against per-appointment data — trea…
nameOfficer name as recorded at CH.
officer_idstringyesCompanies House officer ID.
resigned_countUpstream count of resigned appointments, or null if not provided.
totalintegeryesTotal appointments returned.

No examples provided.

sanctions_screen ~262

Screen a name against the UK (OFSI), US (OFAC), EU and UN consolidated sanctions lists. Returns every list entry whose primary name or alias matches, with the regime, source reference and listing date. Use it to check whether a counterparty — or its officers / persons with significant control — appears on a sanctions list. MATCHING is deterministic: normalised exact + alias match (case-, accent- and punctuation-insensitive). A company/entity legal name matches reliably; PERSON names with transliteration variants may not (e.g. 'Mohammed' vs 'Muhamad'). An empty result is therefore NOT a guarantee of clearance, and a hit on a common name may be a false positive to disambiguate. This is a screening aid, not a compliance determination. `lists_screened` reports which of OFSI/OFAC/EU/UN were actually loaded — if any is missing the result is partial. `as_at` is when the lists were last refreshed on this server.

NameTypeReqDescription
entity_typeOptional filter: 'person' or 'entity'. Omit to screen both.
namestringyesPerson or company/entity name to screen against the consolidated sanctions lists.
NameTypeReqDescription
as_atWhen this server last refreshed the loaded lists (ISO timestamp). Provenance for the screen — the lists update on designation.
entity_type_filterentity_type filter applied to the screen ('person'/'entity'), or null.
hitsarrayMatching list entries. An empty list means no exact/alias match on the screened lists — NOT a guarantee of clearance (see the tool description on matching limits).
lists_screenedarrayWhich consolidated lists were loaded and actually screened for this call. A list absent here failed to load and was NOT screened — treat the result as partial if any of OFSI/OFAC/EU/UN is missing.
match_countintegeryesNumber of list entries that matched the query.
normalized_querystringyesThe normalised form used for matching (upper-cased, accent- and punctuation-stripped, whitespace-collapsed).
querystringyesThe name that was screened.

No examples provided.

search ~82

Search across all UK due diligence registers simultaneously. Searches Companies House, Charity Commission, disqualified directors, and Gazette insolvency notices in parallel. Returns a list of result IDs — use fetch with each ID to retrieve the full record.

NameTypeReqDescription
querystringyesCompany name, charity name, director name, or keyword to search for across all UK due diligence registers

Structured output declared, but exposes no named fields.

No examples provided.

Common questions

What is the UK Due Diligence MCP server?

UK Due Diligence is an MCP server listed in the public MCP registry as io.github.paulieb89/uk-due-diligence-mcp. UK due diligence, Companies House, Charity Commission, Land Registry, Gazette, HMRC VAT. This page covers its hosted endpoint (https://uk-due-diligence-mcp.fly.dev/mcp).

Is the UK Due Diligence MCP server safe to use?

UK Due Diligence scores 81 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the UK Due Diligence MCP server expose?

UK Due Diligence exposes 18 tools: company_search, company_profile, company_officers, company_psc, officer_appointments, and 13 more. Their descriptions and schemas cost roughly 2,969 tokens of context every time the server is loaded.

Does the UK Due Diligence MCP server require authentication?

No. We connected to UK Due Diligence without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the UK Due Diligence MCP server still maintained?

UK Due Diligence is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.