Paychex APIs use REST, authenticate with OAuth 2.0 and return responses in JSON. You can start exploring the APIs by using your Partner App credentials and making your first test requests. This “Getting Started” guide walks you through the essential steps—authentication, onboarding your clients, handling company and worker data, and configuring webhooks.

What's included

•    How to authenticate using OAuth 2.0 with Paychex
•    How to integrate using the RequestClientAccess API
•    How to retrieve company and worker data using the endpoints
•    How to subscribe to Paychex Webhooks for real-time notifications