Ensure your device is connected to the internet and that there are no blocks preventing access to the MCP Server endpoint (https://mcp.mercadopago.com/mcp).

To access the MCP Server, you need a valid credential. Call one of our public APIs to verify your credential, for example the/v1/payment_methodsAPI.

See how it works in practice:

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curl -X GET "https://api.mercadopago.com/v1/payment_methods" \
  -H "Authorization: Bearer <ACCESS_TOKEN>"

The expected outcome is:

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[
  {
    "id": "visa",
    "name": "Visa",
    "payment_type_id": "credit_card",
    "status": "active",
    "secure_thumbnail": "https://www.mercadopago.com/org-img/MP3/API/logos/visa.gif",
    "thumbnail": "http://img.mlstatic.com/org-img/MP3/API/logos/visa.gif",
    "deferred_capture": "supported",
    "settings": {
      "card_number": {
        "length": 16,
        "validation": "standard"
      },
      "security_code": {
        "mode": "mandatory",
        "length": 3,
        "card_location": "back"
      }
    },
    "additional_info_needed": [
      {}
    ],
    "min_allowed_amount": 0.5,
    "max_allowed_amount": 60000,
    "accreditation_time": 2880,
    "financial_institutions": {},
    "processing_modes": "aggregator"
  }
]

If you receive a different response, your credentials may not be valid. If you need a new credential, follow our credentials documentation.

For most MCP clients (such as Cursor, Claude and Windsurf), Node.js 20 or higher is required. To check your current Node.js version, run:

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node -v

The output will show the default Node.js version and it should be version 20 or higher. If you use NVM (Node Version Manager), run the following commands to check installed versions and, if necessary, install a new one:

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# List installed Node.js versions
nvm list

# Install Node.js 20
nvm install 20

# Uninstall a specific version (replace XX with the version number)
nvm uninstall XX

If the issues persist, ensure your Node.js and NPM installations are up to date. Then, check your npm version with:

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npm -v

For more information, check out the NPX documentation.

NPX is a package runner tool bundled with NPM (Node Package Manager) that's used to connect to Mercado Pago MCP Server.

To check if NPX is already installed, run:

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npx --version

If you see a version number, the package is installed. In case you get a "command not found" error, you need to install or upgrade npm (which includes npx).

NPX is included with NPM version 5.2.0 and above. Run the following command to install or upgrade both packages (NPM and NPX):

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npm install -g npm

After upgrading, verify the installation:

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npx --version

If the issues persist, ensure your Node.js and NPM installations are up to date. Then, check your npm version with:

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npm -v

For more information, check out the NPX documentation.

If connection issues persist, try connecting to the MCP Server through your terminal:

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npx -y mcp-remote@latest https://mcp.mercadopago.com/mcp --header 'Authorization:Bearer <ACCESS_TOKEN>'

The expected output should look like this:

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[22599] Using automatically selected callback port: 22476
[22599] Using custom headers: {"Authorization":"Bearer <ACCESS_TOKEN>"}
[22599] [22599] Connecting to remote server: https://mcp.mercadopago.com/mcp
[22599] Using transport strategy: http-first
[22599] Connected to remote server using StreamableHTTPClientTransport
[22599] Local STDIO server running
[22599] Proxy established successfully between local STDIO and remote StreamableHTTPClientTransport
[22599] Press Ctrl+C to exit

Common errors at this stage: