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Using MCP Client as Tools with the Responses API

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

What this sample demonstrates

  • Connecting to an MCP server via HTTP client transport
  • Retrieving MCP tools and passing them to a ChatClientAgent
  • Using MCP tools for agent interactions without server-side agent creation

Prerequisites

  • .NET 10 SDK or later
  • Microsoft Foundry service endpoint and deployment configured
  • Azure CLI installed and authenticated (az login)
  • Node.js installed (for npx/MCP server)

Set the following environment variables:

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

Run the sample

dotnet run