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Payments and billing

Connect Mastercard Open Finance (Finicity) to Hypamoon

Possible, with help from Mastercard Open Finance (Finicity). The API is documented, but you cannot just create a key: access goes through Mastercard Open Finance (Finicity) first.

Possible

The check

Three questions about the API of Mastercard Open Finance (Finicity), answered from its own docs.

Public API docs
Yes. Read the docs
A key you create yourself
No. Sandbox projects are self service, but production plans are approved only after a contract with Mastercard. developer.mastercard.com
Versions or a changelog
Not confirmed.
How it signs in
Finicity-App-Key header plus a Finicity-App-Token that you get from your partner ID and secret; tokens last two hours.
Webhooks
Yes. It can tell your app when something changes. developer.mastercard.com
Hosting
Cloud
Condition
Production after a signed contract with Mastercard.

Your own cash view on Mastercard Open Finance, built around your US accounts.

  • Accounts, balances and transactions from the banks you connect.
  • AI that matches payments to invoices, with your team confirming.
  • A screen for your team and a weekly email.

Ask your chat

Answers straight from your Mastercard Open Finance (Finicity) data, in Claude or another chat with the full Hypamoon connection.

  • Which incoming payments this week are not matched?
  • What is our total cash across banks today?

When something happens

Mastercard Open Finance (Finicity) sends a webhook to your app, and the app asks AI what happens next.

  1. When

    Mastercard sends an event that new transactions are available.

    AI decides

    AI matches payments to open invoices.

    Then

    Your finance team gets an email with matches to confirm.

A screen for your team or customers

An app on your own address, with sign-in, on top of the same Mastercard Open Finance (Finicity) data.

  • For your team

    A cash screen with balances per bank.

Mastercard Open Finance (Finicity) 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 Mastercard Open Finance (Finicity) 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.
  • After five wrong secrets, the partner ID is locked until support unlocks it.

Try it in your chat

First get access from Mastercard Open Finance (Finicity). Then fill in what to read and write, and send it.

Say this in your chat

Build the Hypamoon recipe build-an-adapter for Mastercard Open Finance (Finicity). API docs: https://developer.mastercard.com/open-finance-us/documentation/. 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.

Mastercard Open Finance (Finicity) 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 Mastercard Open Finance (Finicity). 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 Mastercard Open Finance (Finicity)?

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