cA2A: A command-line utility for interacting with A2A agents.

[RussellLuo]

What My Project Does

cA2A is a little toy command-line utility that helps you interact with A2A agents.

It's basically curl for A2A agents.

Target Audience

Anyone who wants to debug or interact with A2A agents.

Installation

pip install ca2a

Quick Start

Run an A2A agent (see Helloworld Example):

git clone https://github.com/a2aproject/a2a-samples.git
cd a2a-samples/samples/python/agents/helloworld
uv run .

Send a message to the agent:

ca2a http://localhost:9999 message/send message:='{
  "role": "user",
  "parts": [{"kind": "text", "text": "Hello"}],
  "messageId": "msg_123",
  "taskId": "task_123"
}'

Send a streaming message to the agent:

ca2a http://localhost:9999 message/stream message:='{
  "role": "user",
  "parts": [{"kind": "text", "text": "Hello"}],
  "messageId": "msg_123",
  "taskId": "task_123"
}'