HelloWorld MCP Server

Instructions

Implementation Reference

• src/index.ts:69-79 (handler)

  Handler logic for the 'hello' tool, extracting the name parameter and returning a greeting text response.

  case 'hello': {
    const targetName = (args as { name?: string }).name || 'World';
    return {
      content: [
        {
          type: 'text',
          text: `Hello, ${targetName}! 👋 Welcome to the HelloWorld MCP server!`,
        },
      ],
    };
  }

• src/index.ts:28-41 (schema)

  Input schema and metadata for the 'hello' tool, defined in the ListTools response.

  {
    name: 'hello',
    description: 'Say hello to someone',
    inputSchema: {
      type: 'object',
      properties: {
        name: {
          type: 'string',
          description: 'The name of the person to greet',
          default: 'World',
        },
      },
    },
  },

• src/index.ts:25-62 (registration)

  Registration of tools including 'hello' via the ListToolsRequestHandler.

  server.setRequestHandler(ListToolsRequestSchema, async () => {
    return {
      tools: [
        {
          name: 'hello',
          description: 'Say hello to someone',
          inputSchema: {
            type: 'object',
            properties: {
              name: {
                type: 'string',
                description: 'The name of the person to greet',
                default: 'World',
              },
            },
          },
        },
        {
          name: 'add',
          description: 'Add two numbers together',
          inputSchema: {
            type: 'object',
            properties: {
              a: {
                type: 'number',
                description: 'First number',
              },
              b: {
                type: 'number',
                description: 'Second number',
              },
            },
            required: ['a', 'b'],
          },
        },
      ],
    };
  });