Using-Samples — client REPLs for the hosted agents
This folder holds small client console apps that connect to the server samples in the
sibling Hosted-* folders. Each Hosted-* project is an agent you host (locally with
dotnet run or deployed to Foundry); the projects here are the thing that talks to them.
Why these exist
A hosted Foundry agent is an HTTP server, not a chat UI. It exposes only the per-agent OpenAI endpoint shape that the platform routes to:
{FOUNDRY_PROJECT_ENDPOINT}/agents/{AZURE_AI_AGENT_NAME}/endpoint/protocols/openai
There is no built-in console to poke it with. To actually exercise an agent — send a prompt,
watch it call its tools, read the streamed answer — you need a client that builds a
FoundryAgent against that endpoint and drives a conversation. That is all these REPLs do:
- Read
FOUNDRY_PROJECT_ENDPOINT+AZURE_AI_AGENT_NAMEfrom the environment. - Derive the per-agent OpenAI endpoint URL.
AIProjectClient(...).AsAIAgent(agentEndpoint)→FoundryAgent.- Loop: read a line,
RunStreamingAsync, print the streamed reply.
The client is deliberately dumb. It knows nothing about tools, files, toolboxes, or auth — all
of that is the hosted agent's concern on the server side. Swapping which agent you chat with is
just a matter of changing AZURE_AI_AGENT_NAME.
Local HTTP dev
When the target is a local http://localhost:8088 dev server, the REPLs install a small
HttpSchemeRewritePolicy: AIProjectClient/BearerTokenPolicy require HTTPS, so the client
presents the endpoint as https:// to satisfy the TLS check, then rewrites the scheme back to
http:// right before the request hits the wire. This is local-development only.
The clients
| Client | What it targets | Notes |
|---|---|---|
SimpleAgent/ |
Any hosted agent | Generic, agent-agnostic REPL. Point it at any Hosted-* server via AZURE_AI_AGENT_NAME. Used by Hosted-Toolbox, Hosted-Toolbox-AuthPaths, and Hosted-McpTools. |
SessionFilesClient/ |
Hosted-Files |
Same shape as SimpleAgent, framed around the bundled-files demo. |
Configuration (common to all clients)
FOUNDRY_PROJECT_ENDPOINT=https://<host>/api/projects/<project>
AZURE_AI_AGENT_NAME=<registered-server-side-agent-name>
Both are required. Authenticate with az login before running. See each client's own README for
its end-to-end walkthrough.