Register a ServeManager webhook and verify inbound payload authenticity using the HMAC-SHA256 signature header
domain: servemanager.com · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Authenticate via HTTP Basic Auth with the API key
POST /api/webhooks with a name, target_url, and an array of event types (e.g. 'jobs:created', 'jobs:updated', 'invoices:created')
Store the returned client_reference_key so the same webhook can later be updated idempotently
On the receiving endpoint, read the X-SM-HMAC-SHA256 header on every inbound POST and compute an HMAC-SHA256 digest of the raw request body using your webhook secret key before trusting the payload
Use PUT /api/webhooks with client_reference_key and update_if_exists to modify an existing subscription's events or target_url instead of creating a duplicate
DELETE /api/webhooks/:id to remove a subscription that is no longer needed
Known gotchas
Signature verification must run against the raw, unparsed request body bytes — re-serializing a JSON-parsed payload before hashing produces a mismatched signature even when the data is unchanged
ServeManager batches multiple events into a single webhook delivery, so a receiver that assumes one event per HTTP call will silently miss later events in the batch
update_if_exists only matters on the create endpoint (to avoid duplicate subscriptions for the same target); the dedicated update endpoint always updates regardless of that flag
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