How to Recover an API Integration After a Provider Changes Its Authentication Method

An API provider may deprecate a password or static key in favor of OAuth, signed requests, or client certificates. Integrations can fail when token acquisition, scopes, redirect URIs, or renewal logic are incomplete.

What to check

Review provider migration guidance, authentication errors, token lifetime and scopes, callback configuration, certificate chain, and the last successful request. Identify all services using the old method.

Recommended next step

Implement the provider-supported method in a test environment, rotate credentials securely, and migrate consumers in a controlled order. Monitor failures and retain a rollback only while the provider still supports it.

How Informatix Systems can help

Informatix Systems provides custom software and API integration services. We can assess the affected environment, trace the problem through its dependencies, and help plan a practical improvement. Contact us with the system involved, when the issue began, and non-sensitive error details.