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Payments and billing

Connect Billit to Hypamoon

Yes. Billit 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 Billit, answered from its own docs.

Public API docs
Yes. Public developer docs with guides for invoices, Peppol e-invoicing and webhooks. Read the docs
A key you create yourself
Yes. For your own, non-commercial integration you use the API key and PartyID from your Billit profile; OAuth credentials for apps you sell come from Billit support. docs.billit.be
Versions or a changelog
Yes. A dated API change log, and a versioning page that promises backwards compatibility. docs.billit.be
How it signs in
The API key from your Billit profile plus your PartyID in the request headers; OAuth 2.0 for integrations offered to other companies.
Webhooks
Yes. It can tell your app when something changes. docs.billit.be
Hosting
Cloud
Condition
The API key is only allowed for integrations you use for your own administration; a commercial integration needs OAuth credentials from Billit.

Your own invoice overview on Billit, built around the questions your team asks.

  • Sales and purchase invoices, customers and e-invoice statuses, straight from Billit.
  • AI that flags invoices that bounce or stay unpaid and tells the right person.
  • A screen for your team and a short weekly email for you.

Ask your chat

Answers straight from your Billit data, in Claude or another chat with the full Hypamoon connection.

  • Which sales invoices from last month are still unpaid?
  • Which e-invoices were not delivered over Peppol?

When something happens

Billit sends a webhook to your app, and the app asks AI what happens next.

  1. When

    Billit reports a new status for an e-invoice, for example delivered or refused.

    AI decides

    AI reads the status and decides whether someone needs to act.

    Then

    The person who sent the invoice gets an email with what happened and what to do next.

A screen for your team or customers

An app on your own address, with sign-in, on top of the same Billit data.

  • For your team

    A screen with open invoices per customer and their delivery status, straight from Billit.

Add Hypamoon

Text messages, email, phone, payments and agents run in the same project as the adapter.

  • Agent on a schedule

    Once a week, an agent emails you the customers with the most overdue invoices.

Billit stays the core: your chat builds the rest on its API, as an adapter plus an app and agents in your Hypamoon project. Reading starts after you click Allow in the portal. Every change an agent or a chat makes in Billit 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.
  • Sandbox and production use separate keys and hosts (api.sandbox.billit.be and api.billit.be).

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 Billit. API docs: https://docs.billit.be/. Read: [what]. Write: [what, or nothing].

Open in Claude

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 7 November 2026.

Billit 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 Billit. Found something that changed? Tell us at support.

More in payments and billing

All 1094 tools

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 Open in ChatGPT

Fill in the name of your software. Checking needs no connection to Hypamoon.

Ready to connect Billit?

Connect your chat once, then ask it to build the adapter.

Start free

Works in Claude, ChatGPT and Copilot. Add to Claude Add to ChatGPT Add to Copilot