Fix the destination
Use one predeclared HTTPS sandbox receiver. Do not treat an early integration as an arbitrary relay.
Guide 06 // Webhook Boundary
MAKE THE FIRST DELIVERY BORING.
This guide covers the Webhook Boundary surface: bounded delivery for a declared webhook route, where the route, receiver and evidence are explicit enough to review.
Bound the request
Validate the declared source, route, method, signature, JSON shape and size before delivery. Reject stale or repeated requests.
Record the outcome
Retain a redacted result, reason code, timestamp and digest. Do not make credentials or raw payloads routine diagnostics.
Sandbox is a boundary, not a marketing label.
It gives a team a safe place to observe behaviour before wider change. It is not an uptime guarantee, business-critical production approval or permission to configure new destinations without review.