How Do I Migrate My Classic XML API to the New Rest API?

In an effort to continue delivering a fast, reliable, and secure cloud accounting experience, FreshBooks uses REST API to support a wider variety of Apps & Integrations.
 
Any API integrations still on the Classic XML API will need to be migrated over to the FreshBooks REST API before it is shut down on February 15, 2022.
 
Custom Integrations built on the Classic XML API will need to be updated to the new REST API before February 15, 2021. Migrate any custom App or Integration that uses Classic XML API by using the below resources: