FlowRelay sends outside JSON events into Shopify Flow with proof at the handoff. Create endpoints, authenticate requests with HMAC-SHA256 or a static header, and see whether each event was accepted, mapped, and handed to Shopify Flow. Authorize agents to set up FlowRelay, monitor endpoints, prepare tests, preview replay, and share diagnostics through scoped grants, redaction, and audit without showing payload values or secrets.

• Receive webhook events in Shopify Flow
• Protect senders with HMAC or static header secrets
• See accepted, failed, no-workflow, and handoff receipts
• Replay retained events with receipt facts and cautions
• Let authorized agents set up FlowRelay, monitor endpoints, and handle recovery