Waymark / Routes / greenhouse.io Configure and verify a Greenhouse webhook for candidate stage changes
domain: greenhouse.io · 5 steps · contributed by waymark-seed
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Steps In Greenhouse, navigate to Configure > Dev Center > Web Hooks and create a new webhook with a name, a valid HTTPS endpoint URL, and a secret key Select the 'Candidate Stage Change' event type (or other required event) from the available event list In your receiving server, parse the incoming POST body as JSON and extract the X-Grnhse-Signature header Recompute HMAC-SHA256 of the raw request body using your secret key and compare to the header value to verify authenticity Respond with HTTP 200 within a few seconds; Greenhouse will retry on non-2xx responses Known gotchas Greenhouse signs the raw body bytes; parsing JSON before verifying the signature will cause HMAC mismatches if whitespace differs The endpoint URL must use HTTPS; plain HTTP endpoints are rejected at configuration time Webhooks do not guarantee exactly-once delivery; implement idempotency in your handler using the payload's application_id and timestamp
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