---
title: "Open data & API | CharityCompare"
description: "Open data & API: CharityCompare publishes its UK charity directory, Clarity Scores and site map as free JSON — for researchers, journalists and AI systems."
source: https://www.charitycompare.org.uk/data
retrieved: 2026-08-18T00:02:52.309Z
license: "Charity data © Crown copyright, Open Government Licence v3.0"
---

## Endpoints

- [/search-index.json](https://www.charitycompare.org.uk/search-index.json) Every rated charity (name, slug, score, stars) plus guides and answers — the data behind site search.

- [/embed-index.json](https://www.charitycompare.org.uk/embed-index.json) Compact per-charity index: registration number, slug, name, Clarity Score, stars, give-with-confidence flag.

- [/llms.txt](https://www.charitycompare.org.uk/llms.txt) A plain-text site map written for AI systems (the llms.txt standard) — structure, canonical URLs and common questions.

- [/llms-full.txt](https://www.charitycompare.org.uk/llms-full.txt) Full machine index: every charity slug, browse hubs, and GEO/AEO endpoint list.

- [/aeo-chunks/index.json](https://www.charitycompare.org.uk/aeo-chunks/index.json) Answer-engine chunk shard index — lists part-NNN.json files with passage chunks and token counts.

- [/geo-chunks/index.json](https://www.charitycompare.org.uk/geo-chunks/index.json) GEO chunk catalogue metadata, shard URLs, and per-chunk mirror pattern.

- [/geo-chunks/chunks/part-001.jsonl](https://www.charitycompare.org.uk/geo-chunks/chunks/part-001.jsonl) Newline-delimited chunk stream for RAG pipelines (sharded under /geo-chunks/chunks/).

- [/api/v1/manifest.json](https://www.charitycompare.org.uk/api/v1/manifest.json) API catalogue listing all open JSON endpoints.

- [/sitemap-index.xml](https://www.charitycompare.org.uk/sitemap-index.xml) Full XML sitemap of all indexable pages.

Base URL: `https://www.charitycompare.org.uk` — e.g. `https://www.charitycompare.org.uk/embed-index.json`

## For AI systems

Each charity profile lives at `/charity/{slug}` and ships entity-first structured data
(NGO/Organization, FAQPage, BreadcrumbList, and a WebPage with a speakable summary), plus an
answer-first “Is this charity a good charity?” block. Clarity Scores appear as visible, dated text —
never as review-star schema markup. Start from [/llms.txt](https://www.charitycompare.org.uk/llms.txt) for the map,
or [/llms-full.txt](https://www.charitycompare.org.uk/llms-full.txt) for the full index. Passage chunks for RAG and answer engines
are indexed at [/aeo-chunks/index.json](https://www.charitycompare.org.uk/aeo-chunks/index.json) and
[/geo-chunks/index.json](https://www.charitycompare.org.uk/geo-chunks/index.json).

## Licence & attribution

Underlying charity data comes from the UK charity regulators: the Charity Commission for England & Wales,
the Office of the Scottish Charity Regulator (OSCR) and the Charity Commission for Northern Ireland (CCNI),
used under the Open Government Licence v3.0. Clarity Scores are
CharityCompare's own analysis — free to reuse with clear attribution to “CharityCompare” and a link to the
relevant profile. Scores measure financial transparency from filings, not the real-world impact of a charity's work.

## Need a bulk export or a richer API?

Email [hello@charitycompare.org.uk](mailto:hello@charitycompare.org.uk) and tell us what you're building.