# Rate limits

Limits apply per account and are shared by all of its API keys.

| Operations | Requests per second |
| --- | --- |
| Search | 5 |
| Contents | 5 |
| Research | 3 |
| Get, cancel and delete Run, combined | 10 |

Over a limit, requests return 429 rate_limit_exceeded. Wait for Retry-After, then retry.

Research also caps how many Runs can be in progress at once. Beyond that, new Research requests return 429 outstanding_run_limit until a Run ends.

## Response headers

- `X-RateLimit-Limit` (integer): Requests allowed in the current window. The X-RateLimit headers may be omitted.

- `X-RateLimit-Remaining` (integer): Requests left in the current window.

- `X-RateLimit-Reset` (integer): Seconds until the window resets.

- `Retry-After` (integer): Seconds to wait before retrying or getting the Run again.

## Usage allowance

To keep usage fair, we size each account's allowance for most individual users' daily work. The allowance is enforced daily and weekly; when either is used up, requests return 429 daily_credits_exhausted or weekly_credits_exhausted until it renews.