BILL API Platform

Integrate. Automate. Scale. All with the BILL API Platform.

Untangle system complexities by integrating BILL’s financial capabilities into your systems. Customize, automate, and control financial workflows with scalable APIs.
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Own your financial workflows with the right
API integration

Integrate payments, real-time data, and spend management to transform your financial operations into a high-efficiency powerhouse.
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Cut manual work with an accounts payable API

Automate repetitive manual tasks, process high-volume payments in a snap, and keep your data synced.

Kick cash flow hurdles to the curb with an invoicing and payment API

Automate invoicing, track payments, and let customers pay online with API-enabled checkout experiences.
An app interface showing an unpaid invoice of $2,500. Payment is processing, with a notification of "new payment received".
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Take charge with a card and expense management API built for growth

Get real-time insights and manage users, budgets, cards,* and workflows at scale—all while controlling spend.

Key API use cases

Automate payments

Easily create, track, and manage payments for smooth and reliable transactions.
Payments API

Vendor management

Access and manage vendor information to maintain vendor records. 
Vendors API

Invoicing and payment collection

Create, manage, and send invoices to simplify payment collection.
Invoices API

Scale budget management

Manage budgets at scale by creating, updating, and assigning them to ensure control and financial visibility.
Budgets API

Flexible card management

Issue, update, and manage virtual cards* to control spending and enhance expense visibility.
Cards API

Streamlined accounting

Maintain an accurate and organized chart of accounts to ensure clear financial oversight and control.
Chart of Accounts API

How customers are using the BILL API Platform

“It only took two days to get everything up and running, and we sent it out to our customers, immediately saving them hours every month closing the books and giving them the benefit of both cash and accrual books—making founders and bookkeepers very, very happy.”
Sasha Orloff
Co-founder and CEO at Puzzle
Read the Case Study
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Frequently asked questions

Does BILL have an API?
BILL currently offers the v3 API. You can leverage our API to integrate your applications with BILL Accounts Payable (AP), BILL Accounts Receivable (AR) and BILL Spend & Expense’s automation and payment capabilities. With the BILL API platform, we have upgraded a wide range of BILL AP, AR, and Spend & Expense features. Learn more about our v3 API here.
Where can I learn more about BILL API Platform documentation?
You can find more information about BILL’s API on our developer site. You can also find standard workflows in our recipes.
How can I login and use the BILL API Platform?
You can find the documentation for the v3 API login here. To access the BILL Spend & Expense API, check the authentication guide to generate a token.
What is the BILL API Platform pricing?
The BILL API is free to use. If you’re interested in our BILL Accounts Payable, BILL Accounts Receivable, or BILL Spend & Expense products, pricing and plan information can be found here.
How can I get BILL API Platform support?
Please click the assistant button at lower right and our team is happy to help.
*The BILL Divvy Card is issued by Cross River Bank, Member FDIC, and is not a deposit product.
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