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.
OpenThe check
Three questions about the API of BILL (Bill.com), answered from its own docs.
- Public API docs
- Yes. Read the docs
- 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
- Versions or a changelog
- Yes. Versioned paths (v3, with v2 still running) and public release notes. developer.bill.com
- 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
- 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
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.
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].
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
Sources
Checked on 1 November 2026.
- developer.bill.com/docs/bill-v3-api-get-started
- developer.bill.com/docs/get-started-in-production
- developer.bill.com/changelog/2026-05-12-new-endpoints-export-operations
- 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.
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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.
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.
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.
Works in Claude and ChatGPT. Add to Claude Add to ChatGPT