Kubernetes MCP Server

Instructions

Implementation Reference

• server.js:1825-1836 (handler)

  Handler function for the 'apply' tool. It destructures 'file' and optional 'namespace' from arguments, constructs the kubectl apply command, executes it using execAsync, and returns the stdout or a success message.

  case "apply": {
    const { file, namespace } = args;
    const nsArg = namespace ? `-n ${namespace}` : "";
    const cmd = `kubectl apply -f ${file} ${nsArg}`;
    const { stdout } = await execAsync(cmd);
    return {
      content: [{ 
        type: "text", 
        text: stdout || `Applied manifest from ${file}` 
      }]
    };
  }

• server.js:670-685 (schema)

  Schema definition for the 'apply' tool in the tools array, used for list tools response. Specifies input parameters: required 'file' string and optional 'namespace' string.

  name: "apply",
  description: "Apply a Kubernetes manifest from a file or URL",
  inputSchema: {
    type: "object",
    properties: {
      file: { 
        type: "string",
        description: "Path to the manifest file or URL"
      },
      namespace: { 
        type: "string",
        description: "The namespace to apply to (optional, defaults to current context namespace)"
      }
    },
    required: ["file"]
  }

• server.js:1392-1394 (registration)

  Generic registration handler for listing all tools, including 'apply', by returning the static 'tools' array containing its schema.

  server.setRequestHandler(ListToolsRequestSchema, async () => {
    return { tools };
  });