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BILL v3 API

REST API providing full-breadth access to BILL's Accounts Payable, Accounts Receivable, and Spend & Expense capabilities including bills, invoices, vendors, customers, payments, approvals, and webhook event notifications. Production calls are made to https://gateway.prod.bill.com/connect/v3 with sandbox at https://gateway.stage.bill.com/connect/v3.

BILL v3 API is one of 11 APIs that BILL publishes on the APIs.io network, described by an AsyncAPI event-driven specification.

Tagged areas include Accounts Payable, Accounts Receivable, Spend Management, Payments, and Webhook. The published artifact set on APIs.io includes API documentation, an API reference, a getting-started guide, and an AsyncAPI specification.

Requests are made against the base URL https://gateway.prod.bill.com/connect/v3.

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI
Base URL
https://gateway.prod.bill.com/connect/v3

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

bill-webhooks-asyncapi.yml Raw ↑

Other APIs BILL publishes across the network.

BILL Elements
BILL Authentication API
BILL Bills API
BILL Customers API
BILL Funding Accounts API
BILL Invoices API
BILL Organizations API
BILL Payments API
BILL Vendors API
BILL Webhooks API
Where this information came from

This is an independent, third-party profile of BILL v3 API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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