Karbon MCP Server

What the code does

We read the source, 20 h ago · rules 3dff92dd89df

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

  const result = spawnSync(command, ["--version"], {

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add karbon-mcp-server -- npx -y karbon-mcp-server

{
  "mcpServers": {
    "karbon-mcp-server": {
      "args": [
        "-y",
        "karbon-mcp-server"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.karbon-mcp-server]
command = "npx"
args = ["-y", "karbon-mcp-server"]

{
  "mcpServers": {
    "karbon-mcp-server": {
      "args": [
        "-y",
        "karbon-mcp-server"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "karbon-mcp-server": {
      "args": [
        "-y",
        "karbon-mcp-server"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: KARBON_BEARER_TOKEN (Bearer token (Application Authorization Token) from Karbon → Settings → Connected Apps → API Applications), KARBON_ACCESS_KEY (Access key (JWT starting with 'ey') from Karbon → Settings → Connected Apps → API Applications), KARBON_READ_ONLY (Set to 'true' to disable all create/update tools (they are not registered at all)), KARBON_ALLOW_PAYMENT_WRITES (Set to 'true' to enable the payment write tools (create/delete/reverse manual payments); off by default). The author declared them in the registry entry; get the values from the project itself.