Developers

Last updated: September 1, 2026

Fin-node publishes a free, keyless, CORS-open JSON API covering the U.S.-listed companies this desk writes about — daily OHLCV, technical indicators, fundamentals, financial statements, insider transactions and news.

Quickstart

There is no signup, no API key and no client library to install. One call:

curl https://www.fin-node.net/api/v1/index.json

That manifest lists every covered ticker. Then fetch one:

curl https://www.fin-node.net/api/v1/AAPL.json

Or the cross-ticker news feed:

curl https://www.fin-node.net/api/v1/news.json

Reference

/api — full endpoint reference and the list of covered tickers.
/api/openapi.json — OpenAPI 3.1 spec. Import it into Postman or Insomnia, generate a client, or hand it to an agent as a tool definition.
/llms.txt — when to use this site, and when not to.

Versioning

Every endpoint is served at both /api/… and the version-pinned /api/v1/…. Same bytes, same daily build. Pin /api/v1/ if you are integrating — a breaking change to the bundle shape ships as /api/v2/ and v1 keeps serving the v1 shape. A retiring version is announced with Deprecation and Sunset headers (RFC 8594) at least 90 days before it stops answering.

Errors

Error responses follow RFC 9457 problem details — a JSON object with type, title, status, a machine-readable code and a hint describing how to recover. The shape is in the OpenAPI spec under components.schemas.Problem.

Rate limits

None are imposed. The API is static JSON served from a CDN, so there is no per-client quota to exceed and no key to throttle. If the edge itself sheds load you will see a 429 with Retry-After; honour it.

Freshness

The data is a daily end-of-day snapshot, rebuilt and redeployed once a day, with a one-hour edge cache. It is not real-time and must not be used as a live price. Every payload carries its own updated timestamp — read it rather than assuming.

Terms

Free to use, including commercially. Please cite Fin-node (fin-node.net) and link back where you can. The data is compiled from public market sources and is provided as-is, with no warranty — it is not investment advice. See the terms of use.

Questions

Email [email protected].