# Authentication

API keys are **optional** for public endpoints (`/v1/protocols`, `/v1/protocols/{id}`, `/v1/screener`, `/v1/stats`, `/v1/health`). Anonymous requests are rate-limited by IP. Pass `X-API-Key` to get higher rate limits and (later) tiered quotas. Wallet scanning (`/v1/wallet/{address}`) requires a Pro plan or higher.

### 2.1 API Key Header

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

### 2.2 API Key Structure

| **Prefix**  | **Environment** | **Behavior**                                                                          |
| ----------- | --------------- | ------------------------------------------------------------------------------------- |
| dpk\_live\_ | Production      | Live protocol data, real usage meters, production rate limits                         |
| dpk\_test\_ | Sandbox         | Synthetic fixture data, no billing charges, same rate limits as production key's plan |

### 2.3 Security

API keys are shown only once at creation. If lost, revoke the key and generate a new one from your account dashboard.

Never embed API keys in client-side code, public repos, or CI logs. Use environment variables or a secrets manager.

Test keys (dpk\_test\_) return identical response shapes to production but with synthetic data. Build and test against test keys; switch to dpk\_live\_ only for production deployments.


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