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Payments and billing

Connect finAPI to Hypamoon

Possible, with help from finAPI. The API is documented, but you cannot just create a key: access goes through finAPI first.

Possible

The check

Three questions about the API of finAPI, answered from its own docs.

Public API docs
Yes. Read the docs
A key you create yourself
No. A sandbox account is requested online for a 30 day free trial; production access is not self service in the docs. documentation.finapi.io
Versions or a changelog
Yes. The API explorer has a version selector and marks deprecated versions. docs.finapi.io
How it signs in
OAuth 2.0: a client token from client ID and secret, and a user token for each end user.
Webhooks
Yes. It can tell your app when something changes. docs.finapi.io
Hosting
Cloud
Condition
Sandbox on request; production terms through finAPI. finAPI holds a BaFin registration as account information service.

Your own bank check on finAPI, built around how you keep your books.

  • Accounts and transactions from German and Austrian banks you connect.
  • AI that matches payments to invoices, with you confirming each match.
  • A screen for your team and an email with open items.

Ask your chat

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

  • Which incoming payments this month have no invoice?
  • What did we pay our top five suppliers last quarter?

When something happens

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

  1. When

    finAPI sends a notification about new transactions.

    AI decides

    AI matches each payment to an open invoice.

    Then

    Your bookkeeper gets an email with the matches to confirm.

A screen for your team or customers

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

  • For your team

    A screen with open and matched payments per account.

finAPI 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 finAPI waits for your approval, one call at a time. How adapters work

Good to know

  • finAPI signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for finAPI takes more work: ask your chat to check this first.
  • Notification rules send push notifications for events such as new transactions.

Try it in your chat

First get access from finAPI. Then fill in what to read and write, and send it.

Say this in your chat

Build the Hypamoon recipe build-an-adapter for finAPI. API docs: https://docs.finapi.io/. 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.

finAPI 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 finAPI. 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 finAPI?

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