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OpenAPI Tools with the Responses API
This sample shows how to use OpenAPI tools with a ChatClientAgent using the Responses API directly.
What this sample demonstrates
- Defining an OpenAPI specification inline
- Creating an
OpenAPIFunctionDefinitionfor the Frankfurter exchange rate API - Using
FoundryAITool.CreateOpenApiTool()withChatClientAgent - Server-side execution of OpenAPI tool calls
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