# Open Index

> House prices, crime, deprivation, schools, broadband, air quality and more for every part of the UK, on one map, at the level of detail each source was published at.

This file describes snapshot 2026.10.11, made 23 October 2026: 132 layers.

## Read and cite a figure

Start with a place or topic page in Markdown: https://openindex.co.uk/hackney.md or https://openindex.co.uk/hackney/housing.md. These contain the same figures as the HTML, without the interface. Cite the HTML URL and the figure's anchor, for example https://openindex.co.uk/hackney#f-house-price-average.
Quote a figure with its place, measure, value, period and source. Credit Open Index beside the original publisher. Source data keeps its publishers' licences.
Keep the published geography and period. Gaps are not zero. Say "recorded crime". Never rank deprivation across nations. Derived figures say "Worked out by Open Index".

## MCP server

- https://openindex.co.uk/mcp: the same figures as tools for AI assistants, over Streamable HTTP. No key or session required. Tools: search_places, get_place, get_ranking, compare_places, lookup_postcode, search, fetch.
- Start with search_places(query), then get_place(place, topic). Answers include periods, sources, licences, fetched dates and citation URLs. The search and fetch tools also support research clients. Guide: https://openindex.co.uk/api#mcp

## API

- [API guide](https://openindex.co.uk/api): read-only JSON, no key. Responses identify the snapshot and each source.
- https://openindex.co.uk/v1/search?q={text}: find official area codes and layers.
- https://openindex.co.uk/v1/places/{code}: one area, for example https://openindex.co.uk/v1/places/E09000012.
- https://openindex.co.uk/v1/places/{code}/data?family=housing: one topic's figures.
- https://openindex.co.uk/v1/layers: layer IDs, coverage and source metadata.
- https://openindex.co.uk/v1/layers/{layer}/values?level=council: values at their published level.
- https://openindex.co.uk/v1/postcodes/{postcode}: areas containing a Great Britain postcode.

## Pages

- [Map](https://openindex.co.uk/): average house price by council, with every other layer one click away
- Layer maps: https://openindex.co.uk/map/{layer}, for example https://openindex.co.uk/map/house-prices or https://openindex.co.uk/map/sold-prices
- [Places](https://openindex.co.uk/places): every nation, region and council
- Place pages: https://openindex.co.uk/{place}, for example https://openindex.co.uk/united-kingdom, https://openindex.co.uk/scotland, https://openindex.co.uk/london or https://openindex.co.uk/hackney. The UK, each nation, English region and council
- Topic pages: https://openindex.co.uk/{place}/{topic}, for example https://openindex.co.uk/united-kingdom/housing, https://openindex.co.uk/london/housing or https://openindex.co.uk/hackney/crime. For the UK, a nation, an English region or a council only; a ward, middle area or neighbourhood has one page with every topic on it. Topics: housing, crime, people, deprivation, health, education, environment, transport, connectivity, planning, economy, council-tax, elections, services
- Constituencies: https://openindex.co.uk/constituency/{slug}
- [Postcodes](https://openindex.co.uk/postcode): every postcode area of Great Britain and its districts
- Postcode areas: https://openindex.co.uk/postcode/{area}, for example https://openindex.co.uk/postcode/sw or https://openindex.co.uk/postcode/ng. Each area's districts with their figures. Outlines are approximate, worked out from the ONS Postcode Directory
- Postcode districts: https://openindex.co.uk/postcode/{district}, for example https://openindex.co.uk/postcode/sw11 or https://openindex.co.uk/postcode/e8. People, house sales, recorded crime and broadband for the district itself, with its neighbourhoods. Great Britain only: Northern Ireland postcodes are not published here
- Postcodes of a place: https://openindex.co.uk/{place}/postcodes, for example https://openindex.co.uk/nottingham/postcodes or https://openindex.co.uk/london/postcodes. The postcode districts covering a council or region
- [Towns](https://openindex.co.uk/places/towns): every town and city with a page, by region
- Town pages: https://openindex.co.uk/town/{slug}, for example https://openindex.co.uk/town/telford or https://openindex.co.uk/town/billericay. ONS built-up areas of 7,500 people or more. Figures add up the output areas that sit mostly inside each town
- School pages: https://openindex.co.uk/school/{name}-{id}, for example https://openindex.co.uk/school/mossbourne-community-academy-e134693. Each open school's details, latest Ofsted outcome and, in England, its KS2 or KS4 results beside its council's and England's. Never ranked
- [Rankings](https://openindex.co.uk/rankings): every council ranked, by measure, for the UK, each nation and each English region
- One ranking: https://openindex.co.uk/rankings/{layer}/{scope}, for example https://openindex.co.uk/rankings/house-prices/london. Scope is uk, a nation or an English region
- [Sources](https://openindex.co.uk/sources): every layer with its publisher, coverage, licence and caveats; one page each at /sources/{layer}
- [Changelog](https://openindex.co.uk/changelog): what changed in each snapshot
- [About](https://openindex.co.uk/about): who runs the site, how the numbers are kept honest, and every credit line

Place, topic, ward, neighbourhood, constituency, postcode, town, school, ranking and source pages have a .md version, advertised by <link rel="alternate" type="text/markdown">. They also answer Markdown when Accept prefers text/markdown. Maps link to their source page for a compact account of the layer's methods and coverage.
Use canonical map links without query parameters for discovery. Map coordinates and postcode-specific views are for people sharing a view. All indexable pages: https://openindex.co.uk/sitemap.xml.

## Catalogue and provenance

- [Full catalogue](https://openindex.co.uk/llms-full.txt): every layer, period, coverage limit, caveat, licence and credit, plus place codes.
- [Sources](https://openindex.co.uk/sources) and [catalogue CSV](https://openindex.co.uk/sources.csv).
- [Changes between snapshots](https://openindex.co.uk/changelog).
- Open Index's own text and the figures it works out are licensed under Creative Commons Attribution 4.0 International (CC BY 4.0), https://creativecommons.org/licenses/by/4.0/. Credit: "Source: Open Index, openindex.co.uk".
- Most source data uses the Open Government Licence. Keep each publisher's licence and credit. Northern Ireland (BT) postcodes and licence-restricted address fields are not provided by the API or downloads.
- Map data © OpenStreetMap contributors, under the Open Database Licence. Base map tiles by Protomaps.
- The DOI 10.5281/zenodo.23508848 (https://doi.org/10.5281/zenodo.23508848) points to the newest archived snapshot. It is not a version-specific archive of live snapshot 2026.10.11.
- To cite the data as a whole: Open Index (2026). Open Index: UK public data by area (snapshot 2026.10.11). https://openindex.co.uk