What is FlowRelay for Shopify Flow?
FlowRelay for Shopify Flow is an external event intake layer for Shopify Flow. It authenticates sender requests, validates expected fields, records receipt facts, and hands a normalized trigger to Shopify Flow.
FlowRelay for Shopify Flow
Get outside events into Shopify Flow with proof you can trust.
Keep Shopify Flow as the workflow engine. FlowRelay gives outside systems a governed front door: verify each request, record what was accepted, show what was handed to Shopify Flow, and keep recovery safe when something needs attention.
Trust the senderSigned requests or static-header checks verify the source before an event enters Shopify Flow.
Know Flow was readyReceipts show whether the matching Shopify Flow trigger was known to be enabled when FlowRelay processed the event.
Keep context intactOrder, customer, inventory, and other event families keep the right Shopify Flow trigger shape.
Recover carefullyReplay and diagnostics show what to review first, with sensitive data redacted.
At a glance
FlowRelay for Shopify Flow, in one page.
FlowRelay for Shopify Flow is the current FlowRelay edition for sending authenticated external events into Shopify Flow with receipt facts, replay context, diagnostics, and governed operator access.
- Product
- FlowRelay for Shopify Flow
- Category
- External event intake and handoff reliability for Shopify Flow.
- Best fit
- Shopify merchants and partners connecting ERP, warehouse, CRM, custom app, or partner-system events to Shopify Flow.
- Not for
- Replacing Shopify Flow, building generic workflows, or proving downstream outcomes after Shopify Flow receives the trigger.
Setup path
A clear first event path for merchants and partners.
For teams connecting an ERP, warehouse, CRM, custom app, or partner system, the goal is simple: external system to FlowRelay endpoint to Shopify Flow trigger to receipt/result, with the workflow logic still inside Shopify Flow.
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01
Create an endpoint for the sender
Pick the Shopify Flow event family and the authentication mode your sender will use.
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02
Connect the matching Flow trigger
Build the workflow in Shopify Flow, where rules, branches, and downstream actions belong.
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03
Send a test event
FlowRelay verifies the request, required fields, mapping, and Flow readiness.
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04
Check the receipt
Confirm what arrived, what passed, and what FlowRelay handed to Shopify Flow.
Need the full walkthrough? Start with the first endpoint guide. Replacing an existing webhook, custom-code, or manual path? Use the swapover guide.
Receipt
fr_rcpt_shopify_0429
Delivered to Shopify Flow
The receipt shows what FlowRelay could prove.
After Shopify Flow receives the trigger, workflow decisions and action results belong there.
Trigger variantExternal order event
Endpoint settingsOrder risk intake, v3
Auth resultHMAC verified
Flow readinessMatching trigger enabled
MappingOrder reference mapped
Handoff resultTrigger handed to Shopify Flow
Replay
Review before retry
Compare the original receipt with current settings and possible Flow side effects.
Diagnostics
Share a redacted package
No raw event bodies, authentication headers, endpoint secrets, tokens, or customer data.
Receipt proof
Proof your team can use when something needs recovery.
A generic webhook log can show that a request arrived. FlowRelay adds the Shopify Flow context merchants and partners need: which trigger family handled the event, which endpoint settings were active, whether the matching Flow trigger was ready, what was handed off, and what is safe to try next.
The same receipt facts can support human operators, setup partners, and authorized agents without exposing secrets or raw event bodies.
- FlowRelay showsIntake, validation, receipt facts, recovery context, diagnostics, and handoff.
- Shopify Flow ownsWorkflow branches, downstream app calls, email sends, fulfillment actions, and other results after the trigger.
- Stays out of proofSecrets, authentication headers, raw event bodies, tokens, session data, and customer data.
Built for Shopify Flow
Use the event family that matches the workflow.
Each endpoint is tied to a Shopify Flow trigger family, so setup guidance, receipts, mapping, and recovery language stay close to the merchant workflow instead of becoming generic webhook noise.
GenericExternal event
General operational events that do not need a Shopify resource reference.
OrderExternal order event
Order, payment, risk, and post-purchase signals from external systems.
CustomerExternal customer event
Lifecycle, support, account, and loyalty signals.
ProductExternal product event
Catalog, merchandising, and product updates.
InventoryExternal inventory event
Warehouse, planning, or stock-position updates.
FulfillmentExternal fulfillment event
Shipment, carrier, and logistics updates.
Return / refundExternal return event
For return, refund, and exception workflows.
Company / B2BExternal company event
B2B account, approval, and wholesale operations.
Questions
Fit and handoff boundaries.
Can FlowRelay trigger Shopify Flow from an external system?
Yes. A sender such as an ERP, warehouse system, CRM, partner app, or custom service can send an authenticated JSON event to a FlowRelay endpoint, then Shopify Flow can use the matching FlowRelay trigger.
What does Delivered mean in FlowRelay?
Delivered means FlowRelay handed the trigger to Shopify Flow. It does not mean Shopify Flow branches, downstream app calls, emails, fulfillment actions, or later systems completed successfully.
When is FlowRelay a good fit?
FlowRelay is a good fit when Shopify Flow should remain the workflow engine, but outside systems need a governed way to send events with authentication, receipts, replay context, diagnostics, and controlled operator access.
What should stay in Shopify Flow?
Rules, branches, conditions, downstream app actions, email sends, fulfillment actions, and business outcomes should stay in Shopify Flow or the downstream systems that execute them.
Related guides
Need to compare, troubleshoot, or move one event first?
Use these guides when you want more context before installing, or when a partner needs a focused page for a specific Shopify Flow handoff question.