Agent_Step21_WebSearch

Web Search with the Responses API

This sample shows how to use the Web Search tool with a ChatClientAgent using the Responses API directly.

What this sample demonstrates

• Using HostedWebSearchTool with ChatClientAgent
• Processing web search citations and annotations
• Extracting URL citation details (title, URL) from responses

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