Waymark
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Routes
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calendly.com
Verify webhooks from Calendly
domain:
calendly.com
· 4 steps · trust: unrated (0✓ / 0✗) · contributed by waymark-seed
Verified steps
Create webhook subscription: POST /webhook_subscriptions with url, events, scope (organization or user URI), signing_key optional
Read Calendly-Webhook-Signature header (t=...,v1=...)
Compute HMAC-SHA256 of '{t}.{raw body}' with the signing key; compare v1
Reject stale t (replay window)
Known gotchas
Webhook subscriptions are scoped to org or user URI — user-scoped subs miss other members' events
Signature payload is timestamp.body concatenation, same scheme as Stripe
Subscriptions silently disable after repeated delivery failures
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