What if your AI assistant could see your actual bank statements? The Open Finance Data MCP connects your bank account to ChatGPT, Claude, and any MCP-compatible AI — through Brazil's Open Finance. Ask about spending, get summaries, analyze patterns in natural language. No account needed — authenticate via Open Finance (your CPF + your bank). Your data, your control — revoke anytime. Setup takes 2 minutes. Built by Cumbuca, a licensed Payment Institution in Brazil.
Hey Product Hunt! Bruno from Cumbuca here.
We're a Payment Institution authorized by Brazil's Central Bank, and we work with Open Finance infrastructure every day. We had this idea that kept nagging us: Open Finance exists to give people control over their financial data. AI assistants are everywhere. Why can't I just ask Claude "what did I spend on food last month?" and get an answer from my actual bank account?
So we built it. The Open Finance Data MCP is a Model Context Protocol server that connects your bank account to any MCP-compatible AI assistant (Claude, ChatGPT, etc.) through Brazil's Open Finance ecosystem.
How it works:
- You add our MCP server URL to your AI client
- First time you ask a financial question, it redirects you to authenticate via Open Finance (your CPF + your bank — standard, regulated flow)
- After that, you can query your bank data in natural language
What makes this different from personal finance apps:
- No account to create. Authentication is 100% via Open Finance.
- Your data isn't stored on our servers — it's queried in real time.
- You can revoke access at any time.
- It works inside the AI tools you already use daily.
Current scope (MVP):
- Bank statements (one account, one bank)
- Rate limit: ~5 queries/day
We believe Open Finance only fulfills its promise when regular people can actually *use* their data. AI is the most natural interface for that. This is our attempt to democratize access to what was supposed to be accessible all along.
MCP server URL: www.cumbuca.com/MCP
This is part of Cumbuca Launch Week — we're shipping 4 tools this week to make Brazil's financial ecosystem more accessible.
Questions for the community:
- What financial data would you query first if your AI could see your bank account?
- For developers building with MCP — what's been your experience so far? What's missing?
- Would you use this for personal budgeting, business expense tracking, or something else entirely?
This is actually crazy, didn't know you could just plug Open Finance data straight into an AI agent like this. The built-in governance is what makes this actually usable in the real world. We need something like this for India's AA framework too honestly. How does it handle cases where the data owner needs to manually approve access?
About Open Finance MCP on Product Hunt
“Access your bank data in ChatGPT & Claude via Open Finance”
Open Finance MCP launched on Product Hunt on May 6th, 2026 and earned 76 upvotes and 5 comments, placing #22 on the daily leaderboard. What if your AI assistant could see your actual bank statements? The Open Finance Data MCP connects your bank account to ChatGPT, Claude, and any MCP-compatible AI — through Brazil's Open Finance. Ask about spending, get summaries, analyze patterns in natural language. No account needed — authenticate via Open Finance (your CPF + your bank). Your data, your control — revoke anytime. Setup takes 2 minutes. Built by Cumbuca, a licensed Payment Institution in Brazil.
Open Finance MCP was featured in Fintech (46.9k followers), Developer Tools (511.9k followers) and Artificial Intelligence (467.6k followers) on Product Hunt. Together, these topics include over 173.7k products, making this a competitive space to launch in.
Who hunted Open Finance MCP?
Open Finance MCP was hunted by Garry Tan. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Garry Tan