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

# Usage limits

> Understand monthly quotas and response headers.

Usage is counted per account and key environment.

| Plan   | Monthly checks |
| ------ | -------------: |
| Free   |            100 |
| Shield |         10,000 |

Test and live usage are stored in separate counters. Each accepted check
increments the counter before policy evaluation.

## Response headers

Successful checks include:

```http theme={null}
X-SignupBear-Usage: 42
X-SignupBear-Limit: 100
```

When the current monthly bucket is full, SignupBear returns HTTP 429 with
`MONTHLY_LIMIT_EXCEEDED`.

<Note>
  These are monthly plan limits, not a promise about burst throughput. Clients
  should use a short timeout and bounded retry policy.
</Note>