Files
SergeyMenshykh c1bbaeb31d Move A2A samples from 04-hosting to 02-agents (#5267)
Move the A2A sample projects (A2AAgent_AsFunctionTools and
A2AAgent_PollingForTaskCompletion) from samples/04-hosting/A2A/ to
samples/02-agents/A2A/ to better align with the sample directory
structure. Update solution file and samples README accordingly.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-04-15 12:08:21 +01:00

938 B

Polling for A2A Agent Task Completion

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_HOST environment 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.

Prerequisites

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