Learn how to implement and test your integration into Finix's APIs.
If you're planning to use Finix's APIs, implementing and testing your integration is critical before going live and accepting payments on behalf of customers. Finix recommends reading through our guides here before starting your implementation.
Error Codes
Learn about the HTTP error codes the Finix API returns and how to resolve them.
Failure Codes
Learn what each failure code means when a transaction gets declined.
Integration Checklist
Use this checklist to ensure a smooth transition when going live with Finix.
Testing Your Integration
Learn how to test your integration in Sandbox before going live.