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Build Square Payroll Integrations Faster

About Square

Square is a modern business operating system with a built-in payroll, automated tax filing, and employee benefits solution.  Known for its sleek design and flexibility, Square Payroll was recognized by Fast Company as one of the world’s “Brands That Matter” in 2021. 

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.


How can I access the employment data in Square Payroll?

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

(1) Build a custom 1:1 integration with Square Payroll via its public APIs, which enables automatic data sharing between the two apps. 

(2) Build a single integration with Finch to access the employment data housed in Square Payroll plus more than 200 other employment systems.

Does Square Payroll have a public API?

Square Payroll offers public APIs to its customers and third-party developers who want to build innovative solutions for employers. Read about Square Payroll’s APIs.

You must first create an account before you can start building. To launch your app on the Square App Marketplace, you must apply to become an app partner. Typically, third-party developers must also pass technical requirements checks and invest in mutual business development efforts.

How long does it take to integrate with Square Payroll?

That largely depends on the integration method you choose. 

If you use Finch’s unified API to access the employment data in Square Payroll (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 instead decide to build a 1:1 integration leveraging Square Payroll’s public APIs, it can take weeks to months to receive your production keys. See Square Payroll's developer portal for more information.

Where can I find developer documentation and support?

If you’re building a 1:1 integration using Square Payroll’s public APIs, the company’s developer portal is the best place to start. That’s where you’ll find technical guides, API references, and the company’s changelog. 

If you’re integrating with Square Payroll 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 used by employers. 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 information. 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 Square Payroll)—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

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Access the global employment ecosystem

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

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