> ## Documentation Index
> Fetch the complete documentation index at: https://anthale.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Anthale Runtime API Reference and Enforcement Contract

> Reference Anthale runtime API behavior, authentication, errors, usage limits, and the generated endpoint contract for enforcement requests.

Anthale's API exists to evaluate content against a policy at runtime and return `allow`, `detect`, `redact`, or `block` before content crosses a trust boundary.

## API at a glance

* HTTPS API with bearer-key authentication.
* Runtime policy-enforcement endpoint.
* Structured action response: `allow`, `detect`, `redact`, `block`.
* Optional per-guardrail evaluations for debugging and tuning.

## Base URL

```text theme={null}
https://api.anthale.com
```

## Common reference pages

<Columns cols={2}>
  <Card title="Authentication" icon="key-round" href="/docs/api-reference/authentication">
    Authenticate runtime API requests with a bearer API key.
  </Card>

  <Card title="Errors" icon="circle-alert" href="/docs/api-reference/errors">
    Handle API failures, retries, and error payloads predictably.
  </Card>

  <Card title="Usage Limits" icon="gauge" href="/docs/api-reference/usage-limits">
    Plan rate-limit handling, backoff, and throughput behavior.
  </Card>
</Columns>

## OpenAPI source of truth

Use the API Reference tab and generated endpoint pages for the current HTTP contract. Anthale publishes the upstream OpenAPI source in the [anthale-openapi repository](https://github.com/anthalehq/anthale-openapi), and the docs site uses that contract to drive endpoint reference content.