# Oimo - [Oimo developer docs](https://docs.oimo.com/index.md): Read reviewed AI and cloud prices with an API key and receive signed webhooks when prices or terms of service change. - [Authentication](https://docs.oimo.com/authentication.md): Authenticate Oimo API requests with a workspace API key sent as a Bearer token. - [Price history API](https://docs.oimo.com/price-history.md): GET /v1/prices/history: every reviewed AI and cloud price, pinned to an instant, by provider or alias group, with cursor paging. - [Webhooks](https://docs.oimo.com/webhooks.md): Signed webhooks for AI and cloud price changes, new resources, terms of service changes and alias groups: events, filters, delivery, retries and secrets. - [Event payloads](https://docs.oimo.com/webhooks/events.md): JSON payloads of every Oimo webhook event: price changes, new resources, terms of service changes, revisions, corrections, removals, renames, new providers and alias groups. - [Verifying signatures](https://docs.oimo.com/webhooks/verify.md): Verify Oimo webhook signatures (Standard Webhooks, HMAC-SHA256) in Node.js and Python, with the standardwebhooks library or by hand. - [Limits and pricing](https://docs.oimo.com/limits.md): Oimo beta pricing and limits: API keys, webhooks, alias groups, filters, page sizes, delivery timeouts and rate limits. - [Errors](https://docs.oimo.com/errors.md): The Oimo API error format and the status codes and error codes it returns. - [Support](https://docs.oimo.com/support.md): How to get help with the Oimo API and webhooks. - [Changelog](https://docs.oimo.com/changelog.md): Changes to the Oimo API and webhook contracts. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.