.NET Aspire isn’t limited to .NET microservices — you can orchestrate Python components just as easily.
In this post, we’ll look at how to run a Python MCP (Model Context Protocol) server inside an Aspire application, integrate it with the MCP Inspector, and expose it via a Dev Tunnel for testing.

Folder Layout

05_PythonMCP/
├─ AppHost.cs
├─ PythonMCP.csproj
├─ appsettings.json
├─ appsettings.Development.json
├─ NuGet.config
├─ README.md
└─ pymcp/
   ├─ main.py
   ├─ requirements.txt
   └─ (optional) .venv/

AppHost.cs

Here’s the full orchestration file:

var builder = DistributedApplication.CreateBuilder(args);

var inspector = builder.AddMcpInspector("mcp-inspector");

var tunnel = builder.AddDevTunnel("dev-tunnel");

var pyMcpServer = builder.AddPythonApp(
    name: "pymcp",
    appDirectory: "./pymcp",
    scriptPath: "main.py"
).WithHttpEndpoint(env: "PORT");

tunnel.WithReference(pyMcpServer, allowAnonymous: true);

inspector.WithMcpServer(pyMcpServer);

builder. Build().Run();

Continue reading “Running a Python MCP server inside .NET Aspire” →