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Use HTTP when your server should run as a network service.

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Start the HTTP transport

import { Redop } from "@redopjs/redop";

new Redop({
  serverInfo: {
    name: "http-server",
    version: "0.1.0",
  },
})
  .tool("ping", {
    handler: () => ({ pong: true }),
  })
  .listen(3000);

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What Redop serves

  • the MCP endpoint is http://localhost:3000/mcp
  • POST /mcp handles JSON-RPC requests
  • GET /mcp opens the event stream used for server notifications
  • DELETE /mcp closes the session

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Verify with curl

Start by verifying that initialize responds: 
curl -i -X POST http://localhost:3000/mcp \
  -H 'Content-Type: application/json' \
  --data '{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{},"clientInfo":{"name":"manual-check","version":"1.0.0"}}}'
Copy the Mcp-Session-Id response header from that first response. Use that session ID on follow-up HTTP requests: 
curl -X POST http://localhost:3000/mcp \
  -H 'Content-Type: application/json' \
  -H 'MCP-Session-Id: your-session-id' \
  --data '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}'
Redop expects MCP-Session-Id on non-initialize HTTP requests.

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Troubleshooting

Turn on transport logging: 
.listen({
  port: 3000,
  debug: true,
})