For AI agents: visit https://developer.bill.com/llms.txt for an index of all pages formatted in Markdown and endpoints in OpenAPI.
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v3
Guides
API Reference
Release Notes
Postman Collection
Video Tutorials
April 2nd, 2025
Added
New v3 API endpoints for Spend & Expense transaction operations
March 21st, 2025
Added
New v3 API endpoints for Spend & Expense card operations
March 17th, 2025
Added
Generate developer keys
March 12th, 2025
Improved
BILL widgets release 2025-03-12
February 28th, 2025
Improved
Bill webhook improvements
February 28th, 2025
Added
New webhook for failed payments
February 28th, 2025
Added
UUIDs in Spend & Expense API
February 27th, 2025
Improved
Payments API response improvements
February 27th, 2025
Added
New v3 API endpoints for general ledger classifications
February 27th, 2025
Improved
List bills and invoices improvements
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