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

# Rate Limits

> Public API rate limiting behavior.

## Response headers

When rate limiting applies, responses include:

* `ratelimit-limit`
* `ratelimit-remaining`
* `ratelimit-reset`

HTTP headers are case-insensitive. The API is served over HTTP/2, which normalizes header names to lowercase on the wire.

When a limit is exceeded, the API returns `429 Too Many Requests`.

## Initial limits

Current defaults:

* standard read endpoints: `300` requests per minute
* heavier read endpoints (`GET /v1/events`, `GET /v1/metrics`, `GET /v1/analyses`): `60` requests per minute
* unauthenticated and token-exchange requests (by source IP): `30` requests per minute

These limits may change by environment or customer tier.