# Open data for people, researchers and AI agents

> Free, documented data for people, researchers and AI agents: 49 tools with sourced pricing and check dates.
> Free to read, quote and reuse with attribution. Please cite "Use Which Tool" and link to https://usewhichtool.com (or the tool's page). Prices change: show the verified date and link the official source.

- Canonical page: https://usewhichtool.com/data
- Last verified: 2026-11-03
- Publisher: Use Which Tool (https://usewhichtool.com), run by Sameer Chowdhry
- Cite as: Use Which Tool, "Open data for people, researchers and AI agents", https://usewhichtool.com/data (last verified 2026-11-03)

## Endpoints

- https://usewhichtool.com/data/tools.json: the full dataset (JSON)
- https://usewhichtool.com/openapi.json: OpenAPI 3.1 description
- https://usewhichtool.com/.well-known/api-catalog: API catalog (RFC 9727)
- https://usewhichtool.com/mcp: read-only MCP server (Streamable HTTP; tools: search_tools, get_tool, compare_tools, list_categories)
- https://usewhichtool.com/llms.txt and https://usewhichtool.com/llms-full.txt
- Any page as Markdown: add .md (home is https://usewhichtool.com/index.md) or send Accept: text/markdown

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Use Which Tool builds verdicts from public docs and official pricing pages, not hands-on testing. No paid rankings. Free to read, quote and reuse with attribution. Please cite "Use Which Tool" and link to https://usewhichtool.com (or the tool's page). Prices change: show the verified date and link the official source.
More: https://usewhichtool.com/llms.txt · https://usewhichtool.com/data/tools.json · https://usewhichtool.com/sitemap.xml