Pokemon MCP Server snipped

pokemon.server.ts

import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { ListToolsRequestSchema, CallToolRequestSchema} from "@modelcontextprotocol/sdk/types.js";


async function getPokemonDetails(pokemonName: string): Promise<string> {
    try {
        const url = `https://pokeapi.co/api/v2/pokemon/${pokemonName.toLowerCase()}`;
        console.error("Fetching Pokemon details from:", url);
        const response = await fetch(url);
        const data = await response.json();
        return JSON.stringify(data);
    } catch (error) {
        return "Error: Could not fetch pokemon details " + (error as Error).message;
    }
}

async function main() {
    console.error("Starting server..."); // Debug log

    const server = new Server({
        name: "pokemon",
        version: "1.0.0",
      }, {
        capabilities: {
          resources: {},
          tools: {} // You don't need to define tools here, they are defined in the setRequestHandler
        }
      });

      server.setRequestHandler(ListToolsRequestSchema, async () => {
        console.error("Received ListTools request"); // Debug log
        return {
            tools: [
                {
                    name: "getPokemonDetails",
                    description: "Get the details of a pokemon",
                    inputSchema: {
                        type: "object",
                        properties: {
                            pokemonName: {
                                type: "string",
                                description: "Name of the pokemon to look up"
                            }
                        },
                        required: ["pokemonName"]
                    }
                }
            ]
        };
      });

      server.setRequestHandler(CallToolRequestSchema, async (request) => {
        console.error("Received CallTool request", JSON.stringify(request, null, 2)); // Debug log
        switch(request.params.name) {
            case "getPokemonDetails":
                const pokemonName = request.params.arguments?.pokemonName;
                if (typeof pokemonName !== 'string') {
                    throw new Error("pokemonName parameter must be a string");
                }

                const pokemonData = await getPokemonDetails(pokemonName);
                return {
                    content: [{
                        type: "text",
                        text: pokemonData
                    }]
                };
            default:
                throw new Error("Tool not found");
        }
    });



      const transport = new StdioServerTransport();
      await server.connect(transport);
      console.error("Server is running and connected to transport"); // Debug log
}

void main().catch((error) => {
    console.error("Server error:", error);
});