> For the complete documentation index, see [llms.txt](https://docs.nansen.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nansen.ai/getting-started/rate-limits.md).

# Rate Limits

### Overview

The Nansen API applies rate limits per API key. Limits vary by subscription tier and are measured over both short and sustained windows.

### Plan limits

| Plan                 |  Per second |     Per minute |
| -------------------- | ----------: | -------------: |
| Free                 | 15 requests |   300 requests |
| Pro (all paid plans) | 75 requests | 1,500 requests |

### Per-endpoint limits

These endpoints have an additional per-minute limit for both Free and Pro plans:

| Endpoint                            |              Limit |
| ----------------------------------- | -----------------: |
| `GET /api/v1/search/token-sectors`  | 60 requests/minute |
| `POST /api/v1/tgm/perp-trades`      | 60 requests/minute |
| `POST /api/v1/profiler/perp-trades` |  5 requests/minute |
| `POST /api/v1/search/web-search`    | 15 requests/minute |
| `POST /api/v1/search/web-fetch`     | 15 requests/minute |

### Rate-limit response headers

Responses may include two layers of rate-limit headers:

* `RateLimit-Limit`, `RateLimit-Remaining`, and `RateLimit-Reset`, together with `X-RateLimit-Limit-Second`, `X-RateLimit-Remaining-Second`, `X-RateLimit-Limit-Minute`, and `X-RateLimit-Remaining-Minute`, describe overall limits.
* Bare `X-RateLimit-Limit`, `X-RateLimit-Remaining`, and `X-RateLimit-Reset` describe the most constrained app-enforced window, which may be plan-wide or endpoint-specific.
* Enforced `429` responses include `X-Nansen-RateLimit-Scope`. Its current values are `second` for a global per-second window, `minute` for a global per-minute window, and `endpoint` for an endpoint-specific window. Treat these values as an open set: do not reject unknown future values; use the generic `429` behavior and honor `Retry-After`.

When both layers are present, self-throttle using the smaller of `RateLimit-Remaining` and `X-RateLimit-Remaining`. If the API returns a **429 Too Many Requests** response, honor `Retry-After` before retrying.

### Exceeding rate limits

If you exceed a limit, the API returns a **429 Too Many Requests** response.


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