# BillSentry API

## Docs

- [Authentication](https://docs.billsentry.net/authentication.md): Obtain an OAuth2 access token using the client credentials flow.
- [Endpoints](https://docs.billsentry.net/endpoints.md): Available API endpoints, request body schemas, and response structure.
- [Error Handling](https://docs.billsentry.net/error-handling.md): HTTP status codes, error response format, and token expiry handling.
- [Introduction](https://docs.billsentry.net/introduction.md): Workers' compensation bill review built for speed, accuracy, and transparency.
- [Making Requests](https://docs.billsentry.net/making-requests.md): Code examples for calling the BillReview API in cURL, Node.js, Python, Ruby, PHP, and C#.
- [Sandbox & Support](https://docs.billsentry.net/sandbox.md): Testing environment details, security requirements, and support contacts.
- [Token Lifecycle](https://docs.billsentry.net/token-lifecycle.md): Production-ready token caching, proactive refresh, and 401 retry patterns in Node.js, Python, Ruby, PHP, and C#.

## OpenAPI Specs

- [openapi](https://docs.billsentry.net/api-reference/openapi.json)