--- title: "Connect BILL (Bill.com) to Hypamoon" description: "BILL (Bill.com) has an open API. See what you can build with it in Hypamoon, how it signs in, and the sources we checked." url: https://hypamoon.com/connect-to/bill --- 1. [Connect to](https://hypamoon.com/connect-to) 2. BILL (Bill.com) ERP and accounting # Connect BILL (Bill.com) to Hypamoon Yes. BILL (Bill.com) has a public, versioned API and you create the key yourself, so your chat can write the adapter. Open ## The check Three questions about the API of BILL (Bill.com), answered from its own docs. **Public API docs**\ **Yes.** [Read the docs](https://developer.bill.com/docs/bill-v3-api-get-started) **A key you create yourself**\ **Yes.** In the BILL web app go to Settings, Sync & Integrations, Manage Developer Keys, accept the developer terms and generate a key. Spend & Expense has its own API token. [developer.bill.com](https://developer.bill.com/docs/get-started-in-production) **Versions or a changelog**\ **Yes.** Versioned paths (v3, with v2 still running) and public release notes. [developer.bill.com](https://developer.bill.com/changelog/2026-05-12-new-endpoints-export-operations) **How it signs in**\ AP and AR: a developer key plus your username, password and organization ID in a login call that returns a session ID, which expires after 35 minutes of inactivity. Spend & Expense: a fixed API token in a header. **Webhooks**\ **Yes.** It can tell your app when something changes. [developer.bill.com](https://developer.bill.com/docs/webhooks) **Hosting**\ Cloud ## What you can build Create vendors and bills from incoming invoices, check which bills wait for approval, and read invoice and payment status from your chat. Your chat writes it as a Hypamoon adapter from the docs above. Reading starts after you click Allow in the portal, and every write waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters) ### Good to know - Your adapter uses a fixed key: you paste it once in the Hypamoon portal, never in the chat, and it only goes to the API host you allow. - Limits are 20,000 calls per developer key per hour, 3 concurrent calls per organization, and 200 logins per hour; Spend & Expense allows 60 calls per minute per token. Organizations with MFA need an MFA trusted session before some actions. ## Try it in your chat Fill in what to read and write, and send it. Say this in your chat > Build the Hypamoon recipe build-an-adapter for BILL (Bill.com). API docs: https://developer.bill.com/docs/bill-v3-api-get-started. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20BILL%20(Bill.com%29.%20API%20docs%3A%20https%3A%2F%2Fdeveloper.bill.com%2Fdocs%2Fbill-v3-api-get-started.%20Read%3A%20%5Bwhat%5D.%20Write%3A%20%5Bwhat%2C%20or%20nothing%5D.) In Claude, or another chat with the full Hypamoon connection; adapters are not in ChatGPT yet. You paste the key in the portal, never in the chat. [The full recipe](https://hypamoon.com/r/build-an-adapter) ## Sources Checked on 1 November 2026. - [developer.bill.com/docs/bill-v3-api-get-started](https://developer.bill.com/docs/bill-v3-api-get-started) - [developer.bill.com/docs/get-started-in-production](https://developer.bill.com/docs/get-started-in-production) - [developer.bill.com/changelog/2026-05-12-new-endpoints-export-operations](https://developer.bill.com/changelog/2026-05-12-new-endpoints-export-operations) - [developer.bill.com/docs/webhooks](https://developer.bill.com/docs/webhooks) BILL (Bill.com) is a name of its owner, used here only to describe the software. This page is not an official integration and Hypamoon has no partnership with BILL (Bill.com). Found something that changed? Tell us at [support](https://hypamoon.com/support#contact). ## More in erp and accounting - [**Acumatica** Open](https://hypamoon.com/connect-to/acumatica) - [**AFAS Profit** Open](https://hypamoon.com/connect-to/afas-profit) - [**DATEV** Possible](https://hypamoon.com/connect-to/datev) - [**e-Boekhouden.nl** Open](https://hypamoon.com/connect-to/e-boekhouden) - [**Exact for Accountancy** Open](https://hypamoon.com/connect-to/exact-for-accountancy) - [**Exact Globe+** Possible](https://hypamoon.com/connect-to/exact-globe) - [**Exact Gripp** Possible](https://hypamoon.com/connect-to/exact-gripp) - [**Exact Multivers** Possible](https://hypamoon.com/connect-to/unit4-multivers) - [**Exact Online** Open](https://hypamoon.com/connect-to/exact-online) - [**FreshBooks** Open](https://hypamoon.com/connect-to/freshbooks) - [**Holded** Open](https://hypamoon.com/connect-to/holded) - [**Isah** Unknown](https://hypamoon.com/connect-to/isah) - [**Jortt** Open](https://hypamoon.com/connect-to/jortt) - [**KING Finance** Possible](https://hypamoon.com/connect-to/king-finance) - [**Lexware Office (lexoffice)** Open](https://hypamoon.com/connect-to/lexoffice) - [**Microsoft Dynamics 365 Business Central** Open](https://hypamoon.com/connect-to/dynamics-365-business-central) - [**Microsoft Dynamics 365 Finance and Operations** Open](https://hypamoon.com/connect-to/dynamics-365-finance-operations) - [**Microsoft Dynamics NAV** Open](https://hypamoon.com/connect-to/dynamics-nav) - [**Moneybird** Open](https://hypamoon.com/connect-to/moneybird) - [**Odoo** Open](https://hypamoon.com/connect-to/odoo) - [**Oracle NetSuite** Open](https://hypamoon.com/connect-to/oracle-netsuite) - [**Pennylane** Open](https://hypamoon.com/connect-to/pennylane) - [**QuickBooks Online** Open](https://hypamoon.com/connect-to/quickbooks-online) - [**Ridder iQ** Unknown](https://hypamoon.com/connect-to/ridder-iq) - [**Sage Accounting (Sage Business Cloud)** Unknown](https://hypamoon.com/connect-to/sage-accounting) - [**Sage Intacct** Possible](https://hypamoon.com/connect-to/sage-intacct) - [**SAP Business One** Open](https://hypamoon.com/connect-to/sap-business-one) - [**SAP S/4HANA** Open](https://hypamoon.com/connect-to/sap-s4hana) - [**sevDesk** Open](https://hypamoon.com/connect-to/sevdesk) - [**Simplicate** Open](https://hypamoon.com/connect-to/simplicate) - [**SnelStart** Possible](https://hypamoon.com/connect-to/snelstart) - [**Syntess Atrium** Closed](https://hypamoon.com/connect-to/syntess-atrium) - [**Twinfield** Possible](https://hypamoon.com/connect-to/twinfield) - [**Unit4 ERPx** Possible](https://hypamoon.com/connect-to/unit4-erpx) - [**Visma eAccounting** Possible](https://hypamoon.com/connect-to/visma-eaccounting) - [**Visma.net ERP** Possible](https://hypamoon.com/connect-to/visma-net-erp) - [**Wave** Possible](https://hypamoon.com/connect-to/wave) - [**Xero** Open](https://hypamoon.com/connect-to/xero) - [**Yuki (Nmbrs Accounting)** Unknown](https://hypamoon.com/connect-to/yuki) - [**Zoho Books** Open](https://hypamoon.com/connect-to/zoho-books) - [**Brex** Open](https://hypamoon.com/connect-to/brex) - [**Expensify** Possible](https://hypamoon.com/connect-to/expensify) - [**Pleo** Possible](https://hypamoon.com/connect-to/pleo) - [**Ramp** Open](https://hypamoon.com/connect-to/ramp) [All 267 tools](https://hypamoon.com/connect-to) ## Tool not listed? Ask the chat to check its API. The same three checks work for any software. Your chat reads the vendor's own docs and tells you what it found. Say this in your chat > Check if \[software\] has an open API that a Hypamoon adapter can use: public API docs, a key or token I can create myself without asking the vendor, and versions or a changelog. Link the pages you used. [Open in Claude](https://claude.ai/new?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) [Open in ChatGPT](https://chatgpt.com/?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) Fill in the name of your software. Checking needs no connection to Hypamoon. ## Ready to connect BILL (Bill.com)? Connect your chat once, then ask it to build the adapter. [Start free](https://app.hypamoon.com/?mode=signup&utm_source=connect-to&utm_campaign=bill) Works in Claude and ChatGPT. [Add to Claude](https://hypamoon.com/connect?via=connect-to~bill#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~bill#chatgpt)