Guides
The three things every integration gets right or wrong: handling errors, verifying webhooks, and not spending money while you build.
Errors & retries
The error envelope, every status code we return, and a retry policy that never costs you a credit twice.
Webhooks & signatures
Verify HMAC-SHA256 signatures, handle the 24h rotation overlap, and survive retries with idempotency.
Test mode
qk_test_ keys run free, quota-bound test calls with deterministic fixtures for development and CI.