This sample demonstrates how to poll for long-running task completion using continuation tokens with an A2A AI agent, following the background responses pattern.
The sample:
- Connects to an A2A agent server specified in the
A2A_AGENT_HOSTenvironment variable - Sends a request to the agent that may take time to complete
- Polls the agent at regular intervals using continuation tokens until a final response is received
- Displays the final result
This pattern is useful when an AI model cannot complete a complex task in a single response and needs multiple rounds of processing.
Before you begin, ensure you have the following prerequisites:
- .NET 10.0 SDK or later
- An A2A agent server running and accessible via HTTP
Set the following environment variable:
$env:A2A_AGENT_HOST="http://localhost:5000" # Replace with your A2A agent server host