# Rate Limits

Every API response includes rate-limit headers so your application can track usage and avoid hitting limits.

Anonymous (no key) requests are rate-limited per IP:

* Burst: 60 req/min
* Daily: 1,000 req/day

Keyed requests use the limits defined on your API key's plan (see Service Plans & Pricing).

### 4.1 Rate Limit Headers

| **Header**                  | **Description**                                  |
| --------------------------- | ------------------------------------------------ |
| X-RateLimit-Limit           | The daily request allowance for this key's plan  |
| X-RateLimit-Remaining       | Requests remaining in the current 24-hour window |
| X-RateLimit-Reset           | Unix timestamp (seconds) when the window resets  |
| X-RateLimit-Burst-Limit     | Per-minute burst limit                           |
| X-RateLimit-Burst-Remaining | Remaining burst capacity this minute             |
| Retry-After                 | Seconds to wait; present only on 429 responses   |

### 4.2 TypeScript: Reading Rate Limit Headers

```typescript
const res = await fetch("https://api.diapleo.xyz/v1/protocols", {
  headers: { "X-API-Key": process.env.DIAPLEO_API_KEY! },
});

const remaining = parseInt(res.headers.get("X-RateLimit-Remaining") ?? "0");
const limit = parseInt(res.headers.get("X-RateLimit-Limit") ?? "0");

if (remaining < 100) {
  console.warn(`Only ${remaining}/${limit} requests remaining today.`);
}

// On 429 responses, check Retry-After
if (res.status === 429) {
  const retryAfter = parseInt(res.headers.get("Retry-After") ?? "60");
  console.error(`Rate limited. Retry in ${retryAfter}s`);
}
```


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