example.ts•2.25 kB
import { withMcp } from "./mod";
import openapi from "./openapi.json";
// Define the OpenAPI specification for our API
type Env = {};
// Export the handler wrapped with MCP functionality
export default {
fetch: withMcp(
// YOUR REGULAR Cloudflare Handler
async (request: Request, env: Env, ctx: ExecutionContext) => {
const url = new URL(request.url);
// Handle POST /add endpoint
if (url.pathname === "/add" && request.method === "POST") {
try {
const body = (await request.json()) as { a: number; b: number };
// Validate input
if (typeof body.a !== "number" || typeof body.b !== "number") {
return new Response(
JSON.stringify({
error: "Both a and b must be numbers",
}),
{
status: 400,
headers: { "Content-Type": "application/json" },
},
);
}
// Perform addition
const result = body.a + body.b;
return new Response(JSON.stringify({ result }), {
status: 200,
headers: { "Content-Type": "application/json" },
});
} catch (error) {
return new Response(
JSON.stringify({
error: "Invalid JSON in request body",
}),
{
status: 400,
headers: { "Content-Type": "application/json" },
},
);
}
}
// Handle other routes or return 404
return new Response(
`Hello, world! This is the 'with-mcp' example.
Please connect to https://with-mcp.wilmake.com/mcp in your inspector (run 'npx @modelcontextprotocol/inspector'), and see the equivalent tool as defined in this worker by using this curl:
"""
curl -X POST https://with-mcp.wilmake.com/add \
-H "Content-Type: application/json" \
-d '{"a": 5, "b": 3}'
# Returns: {"result": 8}
"""
`,
{ status: 404 },
);
},
openapi,
{
// MCP configuration - expose the addNumbers operation as a tool
promptOperationIds: [],
toolOperationIds: ["addNumbers"],
resourceOperationIds: [],
protocolVersion: "2025-03-26",
},
),
};
