When a vendor changes the rules under you
APIs get versioned, deprecated, and shut off. A payment provider drops v1, a platform forces a new auth model, an endpoint you depend on gets a hard sunset date. Ignore it and one day your integration simply stops.
We plan and execute the move to the new API or version so the switch is controlled and reversible — not a frantic weekend when the old endpoint goes dark.
- Map every place your code touches the old API before changing anything
- Diff old vs. new: endpoints, auth model, data shapes, and behavior changes
- An adapter layer so the rest of your app is insulated from the new API's shape
- Contract tests that pin the behavior you depend on
- A firm plan against the vendor's deprecation timeline
Migrate without downtime
The safest migrations run the old and new paths side by side, compare their output, and switch over behind a flag once the new one is proven. That's how you avoid discovering a difference in production.
We favor a parallel run and a fast rollback path so that if the new API behaves unexpectedly, you're one toggle away from the known-good state.
- Parallel running of old and new integrations to compare results
- Feature-flagged cutover so you switch traffic gradually
- A tested rollback path back to the previous integration
- Data backfill or re-sync where the new API represents things differently
- Decommissioning of the old code only after the new path is proven
More on apis & integrations
Frequently asked questions
The old API shuts off in a few weeks — is that enough time?
Often yes, but it depends on how deeply the old API is woven into your app and how different the replacement is. The first step is a quick audit of every place you call it. That tells us the real scope. Bring us the deprecation notice and we'll assess it fast.
Can you migrate without taking our app offline?
That's the goal for most migrations. We run the new integration alongside the old one, compare outputs, and cut over behind a flag. Some rare cases require a brief maintenance window, and if so we'll say that clearly rather than promising zero downtime and hoping.
What if the new API doesn't do everything the old one did?
That happens, and it's better to find it during the audit than at cutover. We check for feature gaps early, and where the new API is genuinely missing something, we lay out the options — a workaround, a different provider, or a scope change — before any code is committed.