One webhook in, every dock served.
A while back I set up order fulfillment for a former colleague’s Shopify store. On paper it’s the well-trodden path: read the docs, subscribe to the webhook topics, write a service that stores incoming orders idempotently, hand them off to the manufacturer’s system.
In practice it was the other kind of integration. The fulfillment side had an undocumented API, so a good chunk of the project was reverse-engineering why my requests weren’t firing and negotiating with their offshore dev team to reset state on their end so I could verify my responses were actually landing. Wanting to be professional, I went out of my way to provide in-depth Swagger docs for the interface to communicate fulfillments back through my services to Shopify. I stood up two environments, one for end-to-end testing from a Shopify test store through a development environment I insisted be set up and a return trip for shipping notifications.
So far, so professional. Then the offshore team went live.
Their go-live verification plan was for me to push test orders through the production pipeline. The pipeline that ends in an actual manufacturing queue. The request was to mutate the purchase order id to prevent actual builds of the product from being made; a request never negotiated during the development lifecycle on either end. For a project priced for a friend the extra development to accomplish this was out of scope, “manufacture some test products so we can check our side”. Not to mention sending test data flowing through a production environment made my skin crawl.
Their instinct wasn’t wrong. They wanted to verify the system with real-shaped traffic, not synthetic fixtures. They probably had production systems that they wanted to see exercise the entire data pipeline. My system, built on a budget, had only one input mechanism and that was an order from the shop it was installed on. Forging a fake one to go through the system end to end would mean faking HMAC signatures and hand verifying every property. If only there was some middleware that could sit between my system and theirs.
What everyone actually wanted was: take real captured traffic, point it at a non-production endpoint.
Capture once, replay anywhere
That’s the problem FlurryPORT.io exists to solve. You put a capture endpoint between your provider and your handler or your handler and an external destination. Every webhook gets stored exactly as sent. Poorly documented endpoints become self-documenting; success and failures are recorded as you debug. Replay to your heart’s content to localhost, test/qa, staging or a remote team with a poorly documented API.
Because the replay is byte-for-byte, the X-Shopify-Hmac-Sha256 signature still verifies on the receiving end. Which means I could send any production order to my test environment, skip mimicking an order from Shopify, add some test indicator to the outgoing request and send it on to the manufacturer’s production environment for their acceptance testing. No mocking, no fixtures drifting out of date, no commenting out the verification “just for testing.”
Two features matter specifically for go-live verification:
Sequential replay. Real verification isn’t one webhook, you are replaying a sequence. An order created, then updated, then cancelled; did you receive the update before the create (a classic Shopify quirk)? FlurryPORT replays a selected sequence in exact order, waiting for each request to complete, stopping at the first failure. That’s an end-to-end pipeline test built from traffic that actually happened.
Replay without re-triggering. Captures persist. You can replay the same order a hundred times while debugging the fulfillment handoff without asking anyone to place another order, bumbling through a test shop to send the same order again, or in my case, without negotiating another state reset with a dev team nine time zones away.
If I’d had this during that project, the go-live conversation becomes: “I’ll replay last Tuesday’s real orders at your test endpoint. Tell me when you’re ready.” No production traffic, no manufactured test products, no scope creep.
The remote team could have also been connecting to a FlurryPORT endpoint of their own or one you supplied; to bring clarity to what they are sending and receiving from your service.
Want to see a capture happen before reading any more marketing? Paste an endpoint from flurryport.dev anywhere a webhook goes — no account, nothing to install, captures live for about an hour. When you're ready to replay them at your own pipeline, the free tier covers a project, two endpoints, and three days of retention.
