Agent_Step23_LocalMCP

Local MCP with the Responses API

This sample demonstrates how to use a local MCP (Model Context Protocol) client with a ChatClientAgent using the Responses API directly.

What this sample demonstrates

• Connecting to an MCP server via HTTP (Streamable HTTP transport)
• Resolving MCP tools locally and wrapping them with logging
• Using DelegatingAIFunction to add custom behavior to MCP tools
• Passing locally-resolved MCP tools to ChatClientAgent

Prerequisites

• .NET 10 SDK or later
• Microsoft Foundry service endpoint and deployment configured
• An authenticated Azure identity (for example, sign in with az login)

Set the following environment variables:

$env:FOUNDRY_PROJECT_ENDPOINT="https://your-foundry-service.services.ai.azure.com/api/projects/your-foundry-project"
$env:FOUNDRY_MODEL="gpt-5.4-mini"

Run the sample

dotnet run