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A2A Client

Call a remote Agent2Agent (A2A) agent

Actions5

Agent → Send Message

AI-generated

Summary

Send text to a remote A2A agent and return its response. Set an agent base URL on the node or in the required A2A credential; optionally provide a context ID or task ID to associate the message with an existing interaction.

Inputs

  • Agent Base URL — Remote agent URL; if empty, the node uses the Base URL from the credential.
  • Message Text (required) — Text content to send in a user message.
  • Context ID — Optional ID for grouping related interactions.
  • Task ID — Optional ID of an existing task to continue.
  • Blocking — Defaults to true. When enabled, waits for the task to reach a terminal state before returning.

Output shape

One output item per input item, containing the A2A response as JSON.

The response is the result of the agent's sendMessage call, which may be a task or a message. With continue-on-fail enabled, errors are returned as an item with an error field.

Examples

Example 1: Send a new request

Provide the agent URL and message text; leave Context ID and Task ID empty to start without associating an existing interaction.

Example 2: Continue an existing task

Provide its Task ID and optionally a Context ID with the new message text.

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