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

# Rate Limits

> Understand request limits, concurrency limits, and retry behavior.

# Rate Limits

Rate limits are enforced per API key, with an additional global per-IP ceiling applied before authentication.

## Tiers

| Tier       | Requests / minute | Burst / second | Max concurrent jobs | Auto-upgrade at             |
| ---------- | ----------------: | -------------: | ------------------: | --------------------------- |
| Free       |                20 |              3 |                   2 | \$0 default                 |
| Tier 1     |               100 |             10 |                  10 | At least \$10 total spend   |
| Tier 2     |               500 |             25 |                  50 | At least \$50 total spend   |
| Tier 3     |             2,000 |             50 |                 200 | At least \$250 total spend  |
| Enterprise |             5,000 |            100 |                 500 | [Contact support](/support) |

The Free tier also has a 1,000 requests/day cap. Paid tiers have no daily cap.

## Handling 429 responses

When you exceed a limit, the API returns `429 Too Many Requests`.

```text theme={null}
HTTP/1.1 429 Too Many Requests
retry-after: 12
x-ratelimit-limit-requests: 100
x-ratelimit-remaining-requests: 0
x-ratelimit-reset-requests: 2026-05-09T10:31:00Z
```

Wait the number of seconds in `retry-after` before retrying. Clients should use exponential backoff with jitter.

## Failure policy

If rate-limiting infrastructure is temporarily unavailable, requests are allowed through. Limits resume automatically when infrastructure recovers.