# Mastercard Developers MCP: Use Mastercard Developers in Slack and Email

Source: https://maito.app/integrations/mastercard-developers

Connect the Mastercard Developers MCP server to Maito in one click, and your whole team can use it from Slack or email: “Which Mastercard API handles card tokenization, and how do I authenticate?”

Mastercard Developers has up-to-date docs and guides for Mastercard APIs. Connect the Mastercard Developers MCP server to Maito once, and everyone on your team can use Mastercard Developers from Slack, by email, or from Claude, ChatGPT, Cursor, Codex, Grok or Muse. Nobody else has to sign in.

-   Connects in one click
-   No sign-in needed
-   One connection for the whole team
-   Server by [Mastercard](https://developer.mastercard.com/)

Updated October 21, 2026

## What you can ask with Mastercard Developers

Requests to Maito

![Dana](https://maito.app/marketing-avatars/dana.webp)

Dana in Slack

Which Mastercard API handles card tokenization, and how do I authenticate?

![Sam](https://maito.app/marketing-avatars/sam.webp)

Sam by email

Find the docs for testing payments in the Mastercard sandbox.

Maito uses Mastercard Developers to do the work and replies where you asked.

## How to connect Mastercard Developers

Open Connections in your workspace and choose Connect next to Mastercard Developers. It needs no separate sign-in: choose Connect and it's ready. Name the account and choose Workspace under who can use it. That's the only time anyone signs in: your whole team, shared chats and Loops can use Mastercard Developers from then on. Or skip ahead and ask for the work: Maito sends you a link if Mastercard Developers isn't connected yet.

## Questions

### What is the Mastercard Developers MCP server URL?

Mastercard publishes it at https://developer.mcp.mastercard.com/, and it needs no sign-in.

### Can I use the Mastercard Developers MCP server from Slack?

Yes. Connect it to Maito once, then mention Maito in any Slack channel or send it a direct message. The same connection works by email and from Claude, ChatGPT, Cursor, Codex, Grok or Muse.

### Does everyone on my team have to connect Mastercard Developers?

No. One person connects it once and chooses Workspace. Then everyone in the workspace, shared chats and Loops can use Mastercard Developers, without signing in themselves. Choose Only me instead to keep it to your own chats.

### Do I have to connect Mastercard Developers before I ask?

No. If a request needs Mastercard Developers and it isn't connected yet, your agent sends you a link. Connect it, and the work picks up where it stopped.

### Can I limit what Maito does in Mastercard Developers?

Yes. After you connect, turn off any Mastercard Developers tools you don't want Maito to use, such as the ones that change data. Tools Mastercard Developers adds later stay off until you turn them on.

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[See all integrations](https://maito.app/integrations)

## Put your AI employee to work.

Set it up in minutes. Connect Mastercard Developers, then hand Maito the first job.

[Put Maito to work](https://maito.app/login?returnTo=%2Fintegrations%2Fmastercard-developers)[Book a demo](https://cal.com/ddubovetzky/chat-with-the-founder)