---
title: "Tendral Health API"
description: "Clinicians verified against the national NPI registry, a versioned JSON API, and docs generated from the same OpenAPI document the API runs on."
url: https://developer.tendralhealth.com/
---

# Tendral Health API

Clinicians verified against the national NPI registry, a versioned JSON API, and docs generated from the same OpenAPI document the API runs on.

Base URL: `https://api.tendralhealth.com/v1`

```bash
curl https://api.tendralhealth.com/v1/health
```

## Pages

- [Quickstart](https://developer.tendralhealth.com/docs/quickstart.md): Make a first call, read a response, and learn how errors and keys work.
- [Authentication](https://developer.tendralhealth.com/docs/authentication.md): Bearer keys, scopes, expiry, revocation and rotation without downtime.
- [Environments](https://developer.tendralhealth.com/docs/environments.md): Production and staging base URLs, keys, test data and going live.
- [Versioning](https://developer.tendralhealth.com/docs/versioning.md): What changes inside /v1, what counts as breaking, and release phases.
- [Errors](https://developer.tendralhealth.com/docs/errors.md): The error envelope and every error code, with what to do about each.
- [Rate limits](https://developer.tendralhealth.com/docs/rate-limits.md): Requests per key per minute, the headers, and handling 429.
- [Idempotency](https://developer.tendralhealth.com/docs/idempotency.md): Retry a write safely with an Idempotency-Key.
- [Pagination](https://developer.tendralhealth.com/docs/pagination.md): Cursor pagination and walking every page of a list.
- [Surveys API](https://developer.tendralhealth.com/docs/early-access/surveys-api.md): Create and check surveys from JSON. In private preview; draft shape.
- [Security & data](https://developer.tendralhealth.com/docs/security.md): PHI, what the platform holds, encryption, key handling and reporting an issue.
- [API reference](https://developer.tendralhealth.com/reference.md): every public endpoint.
- [Changelog](https://developer.tendralhealth.com/changelog.md): dated changes.