Claude Desktop MCP

Add Munition tools to Claude Desktop

Claude Desktop is a common local MCP host. Munition adds a practical tool: upload an artifact from your machine and return a public URL with x402 receipt metadata.

Keywords: claude desktop mcp, Claude Desktop MCP config, Munition MCP

Claude Desktop config file

Edit Claude Desktop's config, then fully quit and restart Claude Desktop so the MCP server is loaded. macOS path: ~/Library/Application Support/Claude/claude_desktop_config.json. Windows path: %APPDATA%\Claude\claude_desktop_config.json.

{
  "mcpServers": {
    "munition": {
      "command": "npx",
      "args": ["-y", "@munition/mcp"],
      "env": {
        "MUNITION_API_URL": "https://api.munition.io"
      }
    }
  }
}

Prompt example

Copy this shape into the agent once Munition is installed.

Use Munition to upload ~/Desktop/demo.mp4 and return the public URL, expiry date, and receipt amount.

Expected result

A successful run should be explicit about the action, output, and paid call.

  • 01

    After restart, Claude Desktop lists Munition tools from the local MCP server.

  • 02

    Claude uploads the chosen local file and returns a public URL plus expiry and receipt metadata.

  • 03

    The payment is made from the local Munition account balance, not from a wallet secret in the conversation.

Limits and privacy

Use Munition for short-lived shareable agent artifacts, not for access-controlled storage.

  • 01

    Uploads cost 0.005 USDC, support files up to 10 MB, and last 7 days by default.

  • 02

    Uploaded files are public to anyone with the URL. Do not upload secrets, regulated data, or anything that should not be public-by-link.

  • 03

    If Claude Desktop does not show the tool after restart, check JSON syntax and confirm Node/npx are installed in the environment Claude Desktop can access.

Follow the setup path for your client or read the paid upload and x402 model.

FAQ

Short answers for agents and humans configuring Munition.

Where is the Claude Desktop MCP config on macOS?

Use ~/Library/Application Support/Claude/claude_desktop_config.json.

Where is it on Windows?

Use %APPDATA%\Claude\claude_desktop_config.json.

Do I need to restart Claude Desktop?

Yes. Fully quit and reopen Claude Desktop after editing the config.

Next step

Add a useful local tool to Claude Desktop

Configure Munition once, restart Claude Desktop, then ask for a real upload.

Read setup instructions