# FixGrid API — developer documentation

> A public API over the maintenance record of one FixGrid customer:
> list and fetch, ticket and occupancy writes, and signed webhooks.
> Keys are minted by the customer's administrator.

## Guides
- [Start here](https://developers.fixgrid.app/): what the key is, included on every plan, how a Company Admin mints it, the first request
- [Authentication](https://developers.fixgrid.app/authentication.html): bearer keys, three scopes, 401 and 403
- [Objects](https://developers.fixgrid.app/objects.html): eight listable resources, occupancy ingest, the list envelope, keyset cursors, per-resource filters, the url deep link and the published enums
- [Errors](https://developers.fixgrid.app/errors.html): the shared shape and all nineteen codes
- [Webhooks](https://developers.fixgrid.app/webhooks.html): ten events, the turn events carry the Turn object, three card-only keys carry an inline dict, hourly first attempt, the signature, the retry ladder, subscriptions over the API
- [Rate limits and versioning](https://developers.fixgrid.app/limits.html)
- [Changelog](https://developers.fixgrid.app/changelog.html): dated changes, 90-day deprecation

## Reference
- [OpenAPI 3.1 document](https://developers.fixgrid.app/openapi.json): the machine-readable contract, no key required
- [Reference](https://developers.fixgrid.app/reference.html): every operation, parameter, response and field, generated from the document