Server postback
HMAC-signed POST callbacks from your backend.
Best for backend systems that already track conversions. Send a JSON POST to /api/cta-postback with the signature in X-Sovads-Sig.
| Field | Description |
|---|---|
| Endpoint | POST /api/cta-postback |
| Header | X-Sovads-Sig (alias X-Signature) — HMAC-SHA256 hex. |
| Body | taskId, optional wallet / fingerprint, optional externalRef, required ts. |
| Response | { success, completionId, awarded, transaction? } |