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All API requests require authentication. Pass your API key as a Bearer token in the Authorization header.

Bearer token

Key prefixes

Getting a key

Sign up at the dashboard or via the API:
Your API key is shown only once in the signup response. Store it securely.

Key rotation

Rotate your key from the dashboard. The old key is revoked immediately.

Error responses

All errors return JSON:

Alternative auth methods

RapidAPI

If you subscribe via RapidAPI, use RapidAPI’s standard headers instead of a Bearer token. Rekko validates the x-rapidapi-proxy-secret automatically.

x402 Micropayments

For crypto-native agents, you can pay per-request with USDC on Base L2. See x402 payments.