Duplicate charges or duplicate calls
Idempotency keys and replay rules when the client or the network repeats a request.
PAYMENTS
Make payment flows and the APIs behind them dependable.
Coconsult designs and integrates transaction journeys into existing applications: provider calls, statuses, retries and supervision.
Problems we work on
Ambiguous timeouts
A timeout is not automatically a failure. The flow has to be able to read a status and continue cleanly.
Reconciliation gaps
Matching payments to operations is defined with your files and APIs, from the way the operation actually runs.
Backends to modernise
Java services and API contracts made more explicit, without rewriting the whole estate when that is not useful.
From the click to operations follow-up
A typical payment journey, from the click through to operations follow-up.
- JourneyA user confirms a payment in your application.
- ControlAmount, unique reference, maximum wait and the rule if the same request returns.
- ProviderAn API call, then a status: accepted, declined, pending or unknown.
- OperationsLogs, alerts and reconciliation with your operations, using only data you can legitimately keep.
What Coconsult delivers
- A scoped journey, including the failure cases
- Payment API integration in your backend
- Timeout, retry and idempotency rules that match the provider contract
- Tests for the happy path and the degraded paths
- Observability that operations can actually use
A diagnostic starts with a focused note.
Describe the journey, the provider you have in mind and the current symptom: duplicate calls, an uncertain status, or an operations gap.