Webhooks
Signature header format
X-TT-Signature: t=<unix_ts>,v1=<hex hmac_sha256(secret, t + "." + body)>
Retry schedule
2s → 10s → 1m → 5m → 30m → 2h → 6h → 24h
Test a webhook
Signs a sample ShipmentEvent locally so you can verify the signature format without hitting an upstream endpoint.
The HTTPS endpoint that will receive the signed webhook payload. Use https:// in production; http://localhost is allowed for local testing.
The whsec_ secret from your webhook configuration. Used to compute the HMAC-SHA256 signature header.