Here are the step-by-step instructions to test the new DevUI feature:
git clone https://github.com/microsoft/agent-framework.git
cd agent-frameworkNavigate to the Python directory and install dependencies:
cd python
uv sync --dev
source .venv/bin/activateCreate a .env file in the python/ directory with your API credentials:
# Copy the example file
cp .env.example .envThen edit .env and add your API keys:
# For OpenAI (minimum required)
OPENAI_API_KEY="your-api-key-here"
OPENAI_CHAT_MODEL_ID="gpt-4o-mini"
# Or for Azure OpenAI
AZURE_OPENAI_ENDPOINT="your-endpoint"
AZURE_OPENAI_CHAT_DEPLOYMENT_NAME="your-deployment-name"Option A: In-Memory Mode (Recommended for quick testing)
cd samples/02-agents/devui
python in_memory_mode.pyThis runs a simple example with predefined agents and opens your browser automatically at http://localhost:8090
Option B: Directory-Based Discovery
cd samples/02-agents/devui
devuiThis launches the UI with all example agents/workflows at http://localhost:8080
- A web interface for testing agents interactively
- Multiple example agents (weather assistant, general assistant, etc.)
- OpenAI-compatible API endpoints for programmatic access
You can also test via API calls:
curl -X POST http://localhost:8080/v1/responses \
-H "Content-Type: application/json" \
-d '{
"model": "weather_agent",
"input": "What is the weather in Seattle?"
}'# Create a conversation
curl -X POST http://localhost:8080/v1/conversations \
-H "Content-Type: application/json" \
-d '{"metadata": {"agent_id": "weather_agent"}}'
# Returns: {"id": "conv_abc123", ...}
# Use conversation ID in requests
curl -X POST http://localhost:8080/v1/responses \
-H "Content-Type: application/json" \
-d '{
"model": "weather_agent",
"input": "What is the weather in Seattle?",
"conversation": "conv_abc123"
}'
# Continue the conversation
curl -X POST http://localhost:8080/v1/responses \
-H "Content-Type: application/json" \
-d '{
"model": "weather_agent",
"input": "How about tomorrow?",
"conversation": "conv_abc123"
}'Agent Framework content types → OpenAI Responses API events (in _mapper.py):
| Agent Framework Content | OpenAI Event | Status |
|---|---|---|
TextContent |
response.output_text.delta |
Standard |
TextReasoningContent |
response.reasoning.delta |
Standard |
FunctionCallContent (initial) |
response.output_item.added |
Standard |
FunctionCallContent (args) |
response.function_call_arguments.delta |
Standard |
FunctionResultContent |
response.function_result.complete |
DevUI |
ErrorContent |
response.error |
Standard |
UsageContent |
response.usage.complete |
Extended |
WorkflowEvent |
response.workflow.event |
DevUI |
DataContent, UriContent |
response.trace.complete |
DevUI |
- Standard = OpenAI spec, Extended = OpenAI + extra fields, DevUI = DevUI-specific
cd python/packages/devui/frontend
yarn install
# Development (hot reload)
yarn dev
# Build (copies to backend ui/)
yarn buildcd python/packages/devui
# All tests
pytest tests/ -v
# Specific suites
pytest tests/test_conversations.py -v # Conversation store
pytest tests/test_server.py -v # API endpoints
pytest tests/test_mapper.py -v # Event mapping- Missing API key: Make sure your
.envfile is in thepython/directory with valid credentials. Or set environment variables directly in your shell before running DevUI. - Import errors: Run
uv sync --devagain to ensure all dependencies are installed - Port conflicts: DevUI uses ports 8080 and 8090 by default - close other services using these ports
Let me know if you run into any issues!