AI A2AClient

AI A2AClient
Certified
Invoke remote AI agent over A2A

Forwards prompts to a remote AI Agent using the A2A protocol and returns its response. Provide a meaningful name and description so the parent agent can choose the tool; the name defaults to tool. Requires serverUrl to reach the remote agent.

yaml
type: io.kestra.plugin.ai.tool.A2AClient

Examples

Call a remote AI agent via the A2A protocol.

yaml
id: a2a_remote_agent_tool
namespace: company.ai

inputs:
  - id: prompt
    type: STRING
    defaults: |
      Each flow can produce outputs that can be consumed by other flows. This is a list property, so that your flow can produce as many outputs as you need.
      Each output needs to have an ID (the name of the output), a type (the same types you know from inputs, e.g., STRING, URI, or JSON), and a value, which is the actual output value that will be stored in internal storage and passed to other flows when needed.
tasks:
  - id: ai-agent
    type: io.kestra.plugin.ai.agent.AIAgent
    provider:
      type: io.kestra.plugin.ai.provider.GoogleGemini
      modelName: gemini-3.5-flash-lite
      apiKey: "{{ secret('GEMINI_API_KEY') }}"
    systemMessage: Summarize the user message, then translate it into French using the provided tool.
    prompt: "{{ inputs.prompt }}"
    tools:
      - type: io.kestra.plugin.ai.tool.A2AClient
        description: Translation expert
        serverUrl: "http://localhost:10000"

Properties

description *string

Agent description

Natural-language summary of what the remote agent does, used by the LLM to decide when to call it. No default: this property is required.

serverUrl *string

Server URL

Base URL of the remote agent's A2A server. No default: this property is required.

name string

Defaulttool

Agent name

Name the LLM sees for this tool. Defaults to tool, so it must be set to a distinct value when several agents are used as tools in the same task.

Huggingface

Tasks that call Hugging Face Inference APIs.

Gemini

Tasks that call Google Gemini models for text, chat, structured outputs, multimodal prompts, and video generation.

AI A2AClientCertifiedInvoke remote AI agent over A2A

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AI A2AClient
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Invoke remote AI agent over A2A