Data API docs · Datasets and the contract
This contract — the OpenAPI 3.1 document itself
GET https://usefootnote.com/api/data/v1/openapi.json
Public by design (it IS the documentation; auth would only stop the notebooks and tooling this audience works in). Static per deploy, cacheable for an hour.
Tier
Every tier. Free keys see the free window; Developer, Data Pro and Enterprise widen it — the exact figures below.
| Tier | Calls | Burst | WARN window |
|---|---|---|---|
| Free | 50/day | 10/min | 30 days |
| Developer | 1,000/day | 30/min | 12 months |
| Data Pro | 10,000/day | 120/min | 24 months |
| Enterprise | 100,000/day | 600/min | full archive |
Parameters
No parameters — the key is the only input.
Example
curl -s "https://usefootnote.com/api/data/v1/openapi.json" \ -H "Authorization: Bearer fn_live_YOUR_KEY"
200 — application/json — this OpenAPI 3.1 document. Every response is { data, meta }; rate-limit headers (x-ratelimit-limit, x-ratelimit-remaining) ride on every call.
Clients
npx footnote-data wraps this endpoint at the prompt (see the package README); the remote MCP server at https://usefootnote.com/api/mcp exposes it as a tool for agents. Licensing: CC BY 4.0 for display with attribution; commercial use on Data Pro and above.
Also in Datasets and the contract
Need more depth than the free window? Developer is $29/mo, Data Pro $79/mo or $790/yr — plans on /data. Get a free key from your account.