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Build Justworks Integration with API

About Justworks

Justworks’ HR platform helps streamline payroll, benefits, and compliance for entrepreneurs who want to grow with confidence. Known for its ease of use and quality of support, Justworks was recently recognized by G2 for being one of the easiest platforms for users to implement, adopt, and use.

Employer Size
1-50 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.


What percentage of the market uses Justworks?

Given that there are 6.1 million employers in the United States as of 2019, and Justworks has around 8,000 customers, the company is estimated to serve 0.13% of the U.S. market.

How can I access the employment data in Justworks?

By building a single integration with Finch, you can access the employment data housed in Justworks plus over 200 other employment systems.

Does Justworks have a public API?

Justworks does not yet offer a public API. However, you can still access your customer’s employment data by integrating with Finch’s unified API. 

How long does it take to integrate with Justworks?

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

Where can I find developer documentation and support?

If you’re integrating with Justworks 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 programs. 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 Justworks)—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. Visit our website to learn more.

Check out our API docs for more info

Customer Stories

You’ll be in good company

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Case Study

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Access the global employment ecosystem

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

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