aal80

resource "aws_lambda_function" "peppa_mcp_server" {
  function_name    = "peppa_mcp_server"
  filename         = data.archive_file.peppa_mcp_server.output_path
  source_code_hash = data.archive_file.peppa_mcp_server.output_base64sha256
  role             = aws_iam_role.peppa_mcp_server.arn
  handler          = "index.handler"
  runtime          = "nodejs22.x"
  memory_size      = 512
  timeout          = 30
}

aal80

import serverlessExpress from '@codegenie/serverless-express';

import mcpServer from './mcpServer.js';
import transport from './transport-http.js';

const expressApp = await transport.bootstrap(mcpServer);
export const handler = serverlessExpress({ app: expressApp });

aal80

    app.post(MCP_PATH, async (req, res) => {
        try {
            await transport.handleRequest(req, res, req.body);
        } catch (err){
            l.error(`Error handling MCP request ${err}`);
            if (!res.headersSent) {
                res.status(500).json({
                    jsonrpc: '2.0',
                    error: {
                        code: -32000,

aal80

const transport = new StreamableHTTPServerTransport({
    sessionIdGenerator: undefined,
    enableJsonResponse: true
});
await mcpServer.connect(transport);

aal80

    const app = express();
    app.use(express.json());

aal80

{
  "mcpServers": {
    "peppa": {
      "command": "node",
      "args": [
        "/{fullpath}/peppa-pig-mcp-server-on-lambda/src/transport-stdio.js"
      ]
    }
  }
}

aal80

import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import mcpServer from './mcpServer.js';
const transport = new StdioServerTransport();
await mcpServer.connect(transport);

aal80

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import resourceGetTimeslots from './resource-timeslots.js'
import toolOrderTickets from './tool-order-tickets.js'

const mcpServer = new McpServer({
  name: "peppa-mcp-server-on-lambda",
  version: "0.0.1"
}, {
  capabilities: {
    tools: {}

aal80

const toolName = 'order-tickets';

const toolDescription =
    'Use this tool to order tickets to the Peppa Pig Park. \
    The tool expects two parameters - timeslot and quantity. \
    The timeslot should be a stringified date. \
    The quantity should be a number. \
    \
    Example: \
    order-tickets(timeslot: "April 19, 2025", quantity: 3) \

aal80

const resourceName = 'timeslots';

const resourceUri = 'peppa://timeslots';

const resourceMetadata = {
    mimeType: 'text/plain',
    description: 
    'Use this resource to get all open timeslots for ordering tickets \
    to the Peppa Pig Theme Park.'
}