Programming Tutorials

  Few things are more frustrating in a DevOps pipeline than a "green" staging deployment that turns "red" immediately upon hitting production. The migration from Payoneer’s Sandbox environment to Production is notorious for triggering   401 Unauthorized   errors, even when the code logic remains unchanged. This error is rarely a code bug. It is almost exclusively an environment configuration drift or an authentication handshake mismatch. When a developer encounters a 401 during this migration, it usually stems from one of two specific failures: pointing valid production credentials at the sandbox authentication server, or failing to construct the Basic Auth header correctly for the new environment variables. The Root Cause: Identity Authority Mismatch To fix the issue, you must understand the underlying OAuth2 architecture Payoneer uses. When you request an access token, you are communicating with an Authorization Server. This server issues a token signed with a spe...