BILL v3 API Reference Overview

The API Reference section enables you to view sample code in your choice of language and also test API calls in the documentation.

Use the BILL API to integrate your application with BILL Accounts Receivable (AR) and Accounts Payable (AP) automation capabilities. When you begin testing with the BILL API, you are in the API sandbox environment.

Start by signing in with POST/v3/login, and then you can perform a set of BILL API operations. This includes adding a vendor, creating a bill, setting up an organization bank account, and submitting a payment.

Prerequisites

Sign in to your BILL developer account with the POST /v3/login API endpoint. The required fields for signing in are username, password, organizationId, and devKey.

You sign in as an organization user

When you sign in to your BILL developer account, you sign in as a user of your BILL organization. In the API response, userId is the BILL-generated ID of the signed-in user.

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IMPORTANT

A BILL partner can perform partner-level operations, which includes creating an organization, and then creating and managing users for that organization. See BILL partner operations for more information.

If you are interested in becoming a BILL partner, please reach out to your account manager for more information.

Sample request

In this cURL example, you sign in to your BILL developer account in the API sandbox environment with POST /v3/login. See Development environments for information about the API sandbox and production environments.

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NOTE

The header value in the v3 API requests is content-type: application/json.

curl --request POST \
--url 'https://gateway.stage.bill.com/connect/v3/login' \
--header 'content-type: application/json' \
--data '{
  "username": "{username}", 
  "password": "{password}",
  "organizationId": "{organization_id}", 
  "devKey": "{developer_key}"
}'

Response

In the response, your API session is created and a generated sessionId is available. Use the sessionId in all subsequent API calls to confirm that you are in a signed-in API session. In addition, userId is the BILL-generated ID of the signed-in user.

{
    "sessionId": "{session_id}",
    "organizationId": "{organization_id}",
    "userId": "{user_id}"
}

See API login in the API reference for more information.