Configure and verify HMAC-signed webhooks for real-time event notifications from Gingr
domain: api-docs.gingrapp.com · 5 steps · contributed by waymark-seed
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Steps
In Gingr Admin under Custom Configurations, add one or more webhook destination URLs and a signature key
Stand up an HTTPS endpoint capable of receiving POST payloads containing webhook_type, entity_id, entity_type, and entity_data
Verify each incoming payload by recomputing the SHA-256 HMAC signature from the event type, entity id, and entity type using the configured signature key
Handle the check_out reservation event specially, since Gingr includes invoice data directly in that payload
Log and monitor webhook delivery failures, retrying idempotently since Gingr may redeliver events
Known gotchas
Multiple webhook URLs can be configured as a comma-separated list, so confirm only intended endpoints are registered
Always validate the HMAC signature before trusting payload contents, since the webhook URL itself is not otherwise authenticated
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