Our value to you

Here's what to expect from Paychex APIs

1 Discover

Check out our documentation to learn about what APIs are available and how to work with them.

2 Signup

Register on the Developer Center either using an existing Paychex Flex Online user account or register as a new user. The first person from your company to register on the site will become your API Account Administrator by default and they can invite additional developers to join your Account from the My Account area.

3 Create an Application

  1. Request an application on the Developer Center in the My Account area. Our developer program will review your request.

  2. After we approve your application, you are ready to connect it to our platform (please see the quick start guide). You may use the sandbox/stub to begin creating your application or go to the next section to gain access to a Company for production use.

4 Application Access to Company

  1. Request company access (linking) from the Application on the Developer Center in the My Account area. Our developer program will review the request to ensure eligibility.

  2. Once approved, the company administrator can grant access.

5 Go Live!

  1. As every good software developer knows you need to Test your application.

  2. Once verified, Release your application and support it. Keep up with the latest information about the developer program here.