API Keys and Webhooks

API Keys

1. Go to Settings → API Keys and click Generate Key.
2. Copy the key now; it is shown once and only a hash is stored.
3. Send it in the X-Api-Key header (or as a Bearer token). Revoke a key from the same page at any time.

See The REST API for the endpoints.

Webhooks

1. Go to Settings → Webhooks and click Add Webhook.
2. Pick the event (invoice.generated, invoice.sent, invoice.failed), enter the HTTPS URL and an optional secret.

The secret is sent as the X-Webhook-Secret header. Deliveries are fire-and-forget: there is no retry, so make your endpoint answer quickly.