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WhereToLive London open data

by wheretolive.xyz · remote · no sign-in to list tools · v1.2.0 · published by xyz.wheretolive

London postcodes and districts from official open data: prices, crime, schools, rents, commutes

Changes · 3

7 tools: 3 change things and 4 only read.

Scanned Oct 21, 2026

2 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http london-open-data https://wheretolive.xyz/mcp

Findings

Matches of fixed checks, with the text they matched.

2 warn
  • The server marks "check_london_postcode" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "open": a word for a change.

    What this check looks for
  • The server marks "get_district_profile" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_district_profile" says "get": a word for reading.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

7 tools

Changes things 3Claude Code: ask
  • check_london_postcodeOpen-data facts at one full London postcode (e.g.1 finding

    Why it is in this group

    • The description's first verb is "open": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "check_london_postcode" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "open": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Open-data facts at one full London postcode (e.g. "E17 4QH"): the Environment Agency flood zone at its centre; whether its centre is inside a conservation area, listed building outline, Article 4 direction area or tree preservation order area (planning.data.gov.uk, with "unknown" where the borough publishes no data); its Census neighbourhood's police.uk crime rate per 1,000 residents against London, Index of Multiple Deprivation decile and housing tenure; the nearest state schools with their own Ofsted grade and the nearest stations, by straight-line distance; door-to-door commute minutes from its postcode sector to 12 work hubs; council tax bands for its borough; and its district page. Every block says which area it describes; a single home can differ.

    Annotations the server declares

    • title: Check a London postcode
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_district_profileOpen-data profile of one London postcode district: HM Land Registry median sold prices of existing flats and houses (12 months, with sales counts and London figures) and five years…1 finding

    Why it is in this group

    • The name "get_district_profile" says "get": a word for reading.
    • The description's first verb is "open": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "get_district_profile" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_district_profile" says "get": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Open-data profile of one London postcode district: HM Land Registry median sold prices of existing flats and houses (12 months, with sales counts and London figures) and five years of yearly medians, police.uk residential crime per 1,000 residents against London, Ofsted grades of its state schools with the Outstanding ones named, the share of its postcodes in Environment Agency flood zones 2 and 3, council tax bands and ONS official rents for its borough(s), and who lives there (Census 2021 tenure and age, and the share of residents in England's most deprived areas on the Index of Multiple Deprivation 2025). Each block has its window, definition, caveats and source, plus a sentence that keeps them together, and the district page URL to cite.

    Annotations the server declares

    • title: London district profile
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • rank_london_districtsLondon postcode districts ranked on one open-data measure: lowest_crime_rate (police.uk residential crime per 1,000 residents), cheapest_houses (Land Registry median sold price of …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
    London postcode districts ranked on one open-data measure: lowest_crime_rate (police.uk residential crime per 1,000 residents), cheapest_houses (Land Registry median sold price of existing houses; flats are not ranked), most_outstanding_schools (Ofsted), or shortest_commute (needs hub). Optional borough filter, commute cut-off and reversed order (most expensive, highest crime, longest commute first). Ranks are London-wide.

    Annotations the server declares

    • title: Rank London postcode districts
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 4Claude Code: allow
  • compare_london_districtsSide-by-side open-data figures for 2 to 6 London postcode districts and London as a whole: median sold price of existing houses, residential crime per 1,000 residents, Outstanding …No findings

    Why it is in this group

    • The name "compare_london_districts" says "compare": a word for reading.
    Description, as the server wrote it
    Side-by-side open-data figures for 2 to 6 London postcode districts and London as a whole: median sold price of existing houses, residential crime per 1,000 residents, Outstanding state schools, share of postcodes in flood zone 3, Band D council tax, the main borough's ONS official rent, the share of residents in England's most deprived 20% of areas, Census 2021 tenure, and optionally commute minutes to one hub.

    Annotations the server declares

    • title: Compare London postcode districts
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • find_london_districtResolve a place name, borough, Tube or rail station, outward code or full postcode to the London postcode district(s) the other tools take.No findings

    Why it is in this group

    • The name "find_london_district" says "find": a word for reading.
    Description, as the server wrote it
    Resolve a place name, borough, Tube or rail station, outward code or full postcode to the London postcode district(s) the other tools take. Returns up to 15 matches with their borough(s) and how each matched. To screen districts on prices, commute, crime, schools, flood or rent, use find_london_districts instead.

    Annotations the server declares

    • title: Find a London postcode district
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • find_london_districtsFind the London postcode districts that meet several open-data criteria at once: a maximum Land Registry median house price, a maximum commute to a work hub, crime at or below the …No findings

    Why it is in this group

    • The name "find_london_districts" says "find": a word for reading.
    Description, as the server wrote it
    Find the London postcode districts that meet several open-data criteria at once: a maximum Land Registry median house price, a maximum commute to a work hub, crime at or below the London rate or under a rate per 1,000 residents, a minimum number of Outstanding state schools, a maximum share of postcodes in flood zone 3, a maximum ONS official borough rent for a number of bedrooms, and an optional borough. Each match carries the figures that qualified it, with sample sizes, and its page URL; districts that cannot be checked for lack of data are counted, not hidden. When nothing matches, it returns the districts that miss by only one criterion, closest first, with by how much, and names the criterion that rules out most of them. Houses only: flat medians are not compared across districts (retirement flats are not identified in Land Registry data).

    Annotations the server declares

    • title: Screen London districts on several criteria
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_commute_timesTypical door-to-door public transport minutes (TfL Journey Planner, 09:00 weekday departure) from a London postcode district to London work hubs, quickest first, with the district'…No findings

    Why it is in this group

    • The name "get_commute_times" says "get": a word for reading.
    Description, as the server wrote it
    Typical door-to-door public transport minutes (TfL Journey Planner, 09:00 weekday departure) from a London postcode district to London work hubs, quickest first, with the district's quickest sector. Hubs: canary-wharf (Canary Wharf), city-of-london (Bank / Liverpool Street / Moorgate), kings-cross (King's Cross), westminster (Westminster), oxford-circus (Oxford Circus), london-bridge (London Bridge), paddington (Paddington), stratford (Stratford), hammersmith (Hammersmith), victoria (Victoria), waterloo (Waterloo), farringdon (Farringdon).

    Annotations the server declares

    • title: Commute times from a London district
    • 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.

Install

Pinned to version 1.2.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http london-open-data https://wheretolive.xyz/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__london-open-data__find_london_district",
      "mcp__london-open-data__find_london_districts",
      "mcp__london-open-data__get_commute_times",
      "mcp__london-open-data__compare_london_districts"
    ],
    "ask": [
      "mcp__london-open-data__check_london_postcode",
      "mcp__london-open-data__get_district_profile",
      "mcp__london-open-data__rank_london_districts"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as london-open-data. Review it before you use it.