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Build Paychex Integration Faster with API

About Paychex

Paychex is an integrated human capital management (HCM) platform that makes complex HR, payroll, and benefits simple. Known for its ease of use and quality of support, Paychex is considered an industry leader for both small businesses and mid-market companies by G2. 

US, Europe
Employer Size
1-100 employees
Employer Count

Powering integrations for hundreds of platforms

Build with confidence

Why developers love building with Finch

Market-leading coverage

Instantly support 180+ systems (and counting) compatible with our normalized data structure and as we add new systems, turn them on with one click.

Enterprise-grade security

Trust Finch’s infrastructure that enforces TLS 1.2 for data in transit and encrypts data at rest using AES 256 bit encryption.

Read and write functionality

Seamlessly read company, census, and payroll data, while writing deductions and benefits contributions changes directly into the source of truth.

Best in class developer experience

Integrate Finch in hours with just a few lines of code and turn on the ability sync data with employers in as little as 30 seconds.

compatible systems
daily API calls
employers connected
U.S. employers covered

Unified API

One API to unite every provider

Finch standardizes employment data across every provider. So you don't have to.


How can I access the employment data in Paychex?

To access your customers’ employment data in Paychex, you have two options: 

  1. Build a custom 1:1 integration with Paychex via its public APIs, which enable automatic data sharing between the two apps. 
  2. Build a single integration with Finch to access the employment data housed in Paychex plus more than 200 other employment systems.

Does Paychex have a public API?

Paychex offers an external API to both its customers and developers wanting to build connected solutions for employers. Read about Paychex’s API.

Developers must apply to become Paychex partners. Typically, such programs require passing both technical requirements and investing in business development efforts. Read about Paychex’s partner program. 

How long does it take to integrate with Paychex?

That largely depends on the integration method you choose. 

If you use Finch’s unified API to access the employment data in Paychex (alongside over 200 other HRIS and payroll systems), it can take as little as a few days. See our quickstart guide for more information.

If you decide to build a 1:1 integration leveraging Paychex’s external API, it can take weeks to months to receive your production keys. See Paychex's developer portal for more information. 

Where can I find developer documentation and support?

If you’re building a 1:1 integration using Paychex’s public APIs, the company’s developer portal is the best place to start. That’s where you’ll find use cases, API docs, Paychex news, and an array of developer resources.

If you’re integrating with Paychex via Finch’s unified API, navigate to our API docs. There, you’ll find a product demo, quickstart guide for developers, integration checklist, and product and developer guides, along with best practices to follow.

Of course, if you have any questions, we’d be happy to help answer them. Send your requests to

When does it make sense to leverage a unified employment API?

Unified employment APIs help developers access data from payroll and HRIS systems employers use. Specifically, these APIs are useful for accessing data from a broad range of employment systems or collecting detailed information about their customers’ payroll and benefits details. If your use case requires integrations with three or more employment systems, a unified employment API could save you hundreds of engineering hours and developer resources. 

Through a single integration, you can connect with over 200 employment systems (including Paychex)—unlocking up to 88% of the employer market. Once authorized by the employer, you’ll receive fresh data every 24 hours. From enterprise-grade security to read and write capabilities, Finch offers compelling benefits to employer-facing businesses of all shapes and sizes. Learn more.

Is the data secure?

Since day one, security and transparency have always been priorities at Finch. We are committed to protecting the data of our customers, employers, and employees.

Finch’s infrastructure enforces TLS 1.2 for data in transit and encrypts data at rest using AES 256 bit encryption. Read more about Security at Finch. Your application front-end redirects your user to Finch Connect, our OAuth 2.0-based authorization flow, which guides your user through granting you access to their employment system.

Check out our API docs for more info

Customer Stories

You’ll be in good company

Case Study

Saveday Cuts Onboarding Time From 5 Hours to 15 Minutes with Finch

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Case Study

How Human Interest Streamlines 401(k) Operations and Onboarding with Finch

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Case Study

How Rillet Stood Up 40 Payroll Integrations in Just 5 Days

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Access the global employment ecosystem

Create a best-in-class experience for your users today.

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