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postcodecontext.uk MCP server

uk.postcodecontext/mcppostcodecontext.ukstreamable-httpv1.0.0Scanned

UK location intelligence: Census, HMLR/RoS prices, EPC, IMD, schools & transit via x402

10 tools: 2 change things and 8 only read.

Tools: 0 delete, 0 irreversible, 2 write, 8 read.
  • Reads private data · 2
  • Reads text others write · 1
  • Can send data out · 0
  • No findings

Tools listed without sign-in. Remote posture

With Anlyon

2 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 postcodecontext.uk MCP server can do

The postcodecontext.uk MCP server is published by postcodecontext.uk, a domain the MCP Registry verified. It has 10 tools. It can create or change data (2 tools: enrich_postcodes and screen_postcodes), but cannot delete data. 8 tools only read.

2 tools read private data (get_data_dictionary and get_data_attribution); 1 tool brings in text other people can write (get_data_attribution).

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 9, 2026, version 1.0.0.

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.

10 tools

Changes things 2Claude Code: ask
  • enrich_postcodesBulk demographic, economic, and spatial lookup for 1 to 50 Great Britain postcodes.No 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.
    Description, as the server wrote it
    Bulk demographic, economic, and spatial lookup for 1 to 50 Great Britain postcodes. Returns brief profile by default (~80 tokens per postcode) to prevent context blow-up; use view="full" when all 113 metrics are needed. Cost-effective for 6 to 50 postcodes ($0.050 flat fee). For 1 postcode use lookup_postcode ($0.005); for 2 to 5 postcodes use compare_postcodes ($0.010). Do not use when detailed side-by-side comparative rankings are required (use compare_postcodes).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • screen_postcodesRank and screen 2 to 10 Great Britain postcodes by a specific target metric (affluence, house price, crime safety, broadband speed, family suitability, or connectivity).No 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.
    Description, as the server wrote it
    Rank and screen 2 to 10 Great Britain postcodes by a specific target metric (affluence, house price, crime safety, broadband speed, family suitability, or connectivity). Returns a sorted leaderboard. For 11 to 50 postcodes use enrich_postcodes; for full cross-metric comparison of 2 to 5 postcodes use compare_postcodes.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 8Show 8 read-only tools
  • compare_postcodesUse when you need to directly contrast 2 to 5 Great Britain postcodes across affluence, safety, housing cost per m², broadband, and family suitability.No findings

    Why it is in this group

    • The name "compare_postcodes" says "compare": a word for reading.
    Description, as the server wrote it
    Use when you need to directly contrast 2 to 5 Great Britain postcodes across affluence, safety, housing cost per m², broadband, and family suitability. Returns full profiles by default; use view="brief" (~80 tokens per postcode) to keep context compact alongside the comparison ranking. Do not use for single postcode inspection (use lookup_postcode) or bulk batches of >5 postcodes (use enrich_postcodes).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_data_attribution$0.00 USDC reference tool (no payment or authentication required; subject to Terms of Service): Retrieve official statutory attribution statements, Crown copyright notices, Royal M…Reads private dataReads text others writeNo findings

    Why it is in this group

    • The name "get_data_attribution" says "get": a word for reading.

    What it can reach

    • private-dataThe description's first sentence says "mail": it reads mail.
    • untrusted-inputThe description's first sentence says "mail": it reads inbound email, which other people can write.
    Description, as the server wrote it
    $0.00 USDC reference tool (no payment or authentication required; subject to Terms of Service): Retrieve official statutory attribution statements, Crown copyright notices, Royal Mail Gridlink sublicence details, and Open Government Licence v3.0 metadata across all 19 contributing data providers (ONS, OS, Royal Mail, HM Land Registry, Registers of Scotland, MHCLG, Ofcom, Scottish Government, Welsh Government, DfE, CQC, PHS, NWSSP, DfT, ORR).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_data_dictionary$0.00 USDC reference tool (no payment or authentication required; subject to Terms of Service): Retrieve exact field specifications, mathematical calculation formulas, statistical …Reads private dataNo findings

    Why it is in this group

    • The name "get_data_dictionary" says "get": a word for reading.

    What it can reach

    • private-dataThe description's first sentence says "database": it reads databases.
    Description, as the server wrote it
    $0.00 USDC reference tool (no payment or authentication required; subject to Terms of Service): Retrieve exact field specifications, mathematical calculation formulas, statistical scales, and data sources for any metric across Great Britain in the Postcode Context database.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_demographics_and_deprivationRetrieve Census demographic breakdown (ONS Census 2021 / NRS Scotland Census 2022 income estimate, qualifications, tenure, employment, age) and statutory IMD deprivation deciles (I…No findings

    Why it is in this group

    • The name "get_demographics_and_deprivation" says "get": a word for reading.
    Description, as the server wrote it
    Retrieve Census demographic breakdown (ONS Census 2021 / NRS Scotland Census 2022 income estimate, qualifications, tenure, employment, age) and statutory IMD deprivation deciles (IoD 2025, WIMD 2025, SIMD 2020 crime safety, education, living environment) for any Great Britain postcode. Covers England, Scotland, and Wales.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_postcode_ai_briefRetrieve an ultra-lightweight, token-efficient natural language briefing, affluence tier, and persona profile (~80 tokens) for fast autonomous agent decision-making across Great Br…No findings

    Why it is in this group

    • The name "get_postcode_ai_brief" says "get": a word for reading.
    Description, as the server wrote it
    Retrieve an ultra-lightweight, token-efficient natural language briefing, affluence tier, and persona profile (~80 tokens) for fast autonomous agent decision-making across Great Britain. Covers England, Scotland, and Wales (excludes Northern Ireland BT postcodes).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_property_and_energy_profileRetrieve real estate valuation (HM Land Registry / Registers of Scotland median house price, price per sqm, 3yr sales volume), EPC energy efficiency (current/potential band, retrof…No findings

    Why it is in this group

    • The name "get_property_and_energy_profile" says "get": a word for reading.
    Description, as the server wrote it
    Retrieve real estate valuation (HM Land Registry / Registers of Scotland median house price, price per sqm, 3yr sales volume), EPC energy efficiency (current/potential band, retrofit upside), and Ofcom gigabit broadband connectivity for any Great Britain postcode. Covers England, Scotland, and Wales (excludes Northern Ireland BT postcodes).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • lookup_postcodeUse when you need demographic, property, EPC energy efficiency, broadband, or socio-economic context for a Great Britain unit postcode (England, Scotland, Wales).No findings

    Why it is in this group

    • The name "lookup_postcode" says "lookup": a word for reading.
    Description, as the server wrote it
    Use when you need demographic, property, EPC energy efficiency, broadband, or socio-economic context for a Great Britain unit postcode (England, Scotland, Wales). Returns full profile by default; use view="brief" (~80 tokens) for low-token, concise briefings when managing context budget. Do not use for non-GB postcodes (e.g. Northern Ireland BT) or when comparing multiple postcodes simultaneously (use compare_postcodes instead).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • summarise_outcodeUse when you only have an outward code / district (e.g.No findings

    Why it is in this group

    • The name "summarise_outcode" says "summarise": a word for reading.
    Description, as the server wrote it
    Use when you only have an outward code / district (e.g. SW1A, BB7, EH1, CF10) and need high-level district demographic and property statistics (~150 tokens). Do not use when an exact full unit postcode is available (use lookup_postcode).

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

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 outbound.

Reads private data2
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write1
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
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 10, 2026, 08:20 UTC, unchanged since Nov 10, 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
2
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 2 tools that change things (2 write). Whether a call also works without credentials was not tested: tools are never called.

    Matched text

    https://api.postcodecontext.uk/mcp: tools/list returned 10 tools to an anonymous client, including enrich_postcodes (write), screen_postcodes (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.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http postcodecontext https://api.postcodecontext.uk/mcp
claude mcp add --transport http postcodecontext https://api.postcodecontext.uk/mcp

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__postcodecontext__lookup_postcode",
      "mcp__postcodecontext__compare_postcodes",
      "mcp__postcodecontext__summarise_outcode",
      "mcp__postcodecontext__get_postcode_ai_brief",
      "mcp__postcodecontext__get_property_and_energy_profile",
      "mcp__postcodecontext__get_demographics_and_deprivation",
      "mcp__postcodecontext__get_data_dictionary",
      "mcp__postcodecontext__get_data_attribution"
    ],
    "ask": [
      "mcp__postcodecontext__enrich_postcodes",
      "mcp__postcodecontext__screen_postcodes"
    ],
    "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 postcodecontext. Review it before you use it.

Capability tags behind 2 rules
  • mcp__postcodecontext__get_data_dictionary private-data
  • mcp__postcodecontext__get_data_attribution private-data, untrusted-input

Pin

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.postcodecontext/mcp/verify?hash=cf0a9c67f78b29f1ade35e39287f9c5e37462ef6280f2643307e8b90910ea7ee" | jq -e '.changed == false'

Pinned hash cf0a9c67f78b, from Nov 9, 2026, 23:18 UTC.

Watch

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

https://anlyon.dev/servers/uk.postcodecontext/mcp/changes.xml

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Badge

anlyon.dev badge for uk.postcodecontext/mcp
[![anlyon.dev](https://anlyon.dev/badge/uk.postcodecontext/mcp.svg)](https://anlyon.dev/servers/uk.postcodecontext/mcp)

Source: MCP Registry · repository. Synced Nov 9, 2026, 23:18 UTC.

postcodecontext.uk MCP server: questions and answers

Answered from the scan above, not from the publisher's description.

Is the postcodecontext.uk MCP server safe?

No scan can promise that. What its definitions show: 10 tools, 2 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 postcodecontext.uk MCP server delete data?

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

Can the postcodecontext.uk 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 postcodecontext.uk MCP server have?

10 tools: 2 write, 8 read. enrich_postcodes, screen_postcodes, lookup_postcode, compare_postcodes, summarise_outcode, get_postcode_ai_brief, get_property_and_energy_profile, get_demographics_and_deprivation and 2 more.

Does the postcodecontext.uk MCP server need sign-in or OAuth?

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

Does the postcodecontext.uk MCP server send data to outside services?

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

Has the postcodecontext.uk MCP server changed its tools?

Not since anlyon.dev started tracking it. Last scanned Nov 9, 2026.