Developers and AI agents
Rank4AI Data API
Rank4AI publishes its original UK AI search visibility research as a read-only public API and as an MCP server for AI clients. The data is the same one behind the UK AI Search Visibility Statistics Index: research statistics with a measured value, date, category and source, plus a coverage snapshot. No authentication, no personal data, released under CC BY 4.0.
REST endpoints
Base URL https://www.rank4ai.co.uk/api. All responses are JSON with open CORS, an ETag and edge caching. Full machine-readable contract: OpenAPI 3.1 spec.
| Method | Path | Description |
|---|---|---|
| GET | /api/stats | List all published statistics. Optional filters: ?q=, ?category=. https://www.rank4ai.co.uk/api/stats?category=AI%20Crawler%20Access |
| GET | /api/stats/{slug} | Detail for one statistic, keyed on its canonical slug. https://www.rank4ai.co.uk/api/stats/44-percent-uk-sme-no-organisation-schema |
| GET | /api/stats-snapshot | Coverage snapshot: statistic count, category split and dated coverage range. https://www.rank4ai.co.uk/api/stats-snapshot |
MCP server
The same data is exposed as a remote Model Context Protocol server over streamable HTTP, so MCP-capable AI clients can read it directly.
- Endpoint:
https://www.rank4ai.co.uk/mcp(JSON-RPC 2.0, POST) - Manifest: /.well-known/mcp.json
- Resources:
r4://dataset,r4://stats-snapshot,r4://stats/{slug} - Tool:
search_stats(query?, category?)
Terms
Read-only and free under CC BY 4.0: attribute Rank4AI and link back to the Statistics Index. Every figure originates in our own UK SME website audits. Please cache responses and avoid abusive request rates.