How do I install the A2a Protocol skill?

Run npx skillmds@latest add modbender/a2a-protocol in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the A2a Protocol skill do?

Agent2Agent (A2A) Protocol implementation - communicate with other AI agents It is listed under Coding & Dev Tools on SkillMD.

Is A2a Protocol safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: executes scripts, makes network calls, reads secrets. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with A2a Protocol?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is A2a Protocol free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published A2a Protocol?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

A2a Protocol by modbender — Agent Skill

Name: A2a Protocol
Rating: 4.2 (5 reviews)
Author: modbender

File contents

A2A Protocol Skill

Implementation of the Agent2Agent (A2A) Protocol for inter-agent communication.

What it does

Agent Discovery via Agent Cards
Send Messages to remote agents
Task Management (submit, check status, get results)
Streaming via Server-Sent Events (SSE)
Authentication support (API keys, Bearer tokens)

Installation

# Install Python dependencies
pip install requests sseclient-py

Usage

Register Your Agent

.\a2a.ps1 -Action register -Name "MyAgent" -Description "Research agent" -Capabilities "research,analysis" -Endpoint "https://my-agent.com/a2a"

Get Agent Card

.\a2a.ps1 -Action card -AgentId "uuid-of-agent"

Send Message

.\a2a.ps1 -Action send -ToAgent "target-agent-uuid" -Content "Hello agent!"

Submit Task

.\a2a.ps1 -Action task -ToAgent "target-agent-uuid" -Task "Research quantum computing"

Check Task Status

.\a2a.ps1 -Action status -TaskId "task-uuid"

List Remote Agents

.\a2a.ps1 -Action list -RegistryUrl "https://registry.agentlink.io"

A2A Concepts

Agent Card: JSON describing agent capabilities (name, endpoint, methods)
Client Agent: Agent that sends tasks
Remote Agent: Agent that receives and processes tasks
Task: Work request with ID, status, and result
Message: Direct communication between agents

API Reference

POST /a2a/agents/register - Register agent
GET  /a2a/agents/{id}    - Get agent info
GET  /a2a/agents/{id}/card - Get Agent Card
POST /a2a/messages       - Send message
POST /a2a/tasks          - Submit task
GET  /a2a/tasks/{id}     - Get task status
GET  /a2a/tasks/{id}/result - Get task result

Examples

Python Usage

from a2a import A2AClient

client = A2AClient("https://remote-agent.com/a2a", api_key="your-key")

# Send message
client.send_message("target-agent-id", "Hello!")

# Submit task
task_id = client.submit_task("target-agent-id", "Do X")
result = client.get_result(task_id)

Requirements

Python 3.8+
requests library
sseclient-py (for streaming)

License

MIT

---name: a2a-protocoldescription: Agent2Agent (A2A) Protocol implementation - communicate with other AI agents--- # A2A Protocol Skill Implementation of the Agent2Agent (A2A) Protocol for inter-agent communication. ## What it does - **Agent Discovery** via Agent Cards - **Send Messages** to remote agents - **Task Management** (submit, check status, get results) - **Streaming** via Server-Sent Events (SSE) - **Authentication** support (API keys, Bearer tokens) ## Installation ```powershell # Install Python dependencies pip install requests sseclient-py ``` ## Usage ### Register Your Agent ```powershell .\a2a.ps1 -Action register -Name "MyAgent" -Description "Research agent" -Capabilities "research,analysis" -Endpoint "https://my-agent.com/a2a" ``` ### Get Agent Card ```powershell .\a2a.ps1 -Action card -AgentId "uuid-of-agent" ``` ### Send Message ```powershell .\a2a.ps1 -Action send -ToAgent "target-agent-uuid" -Content "Hello agent!" ``` ### Submit Task ```powershell .\a2a.ps1 -Action task -ToAgent "target-agent-uuid" -Task "Research quantum computing" ``` ### Check Task Status ```powershell .\a2a.ps1 -Action status -TaskId "task-uuid" ``` ### List Remote Agents ```powershell .\a2a.ps1 -Action list -RegistryUrl "https://registry.agentlink.io" ``` ## A2A Concepts - **Agent Card**: JSON describing agent capabilities (name, endpoint, methods) - **Client Agent**: Agent that sends tasks - **Remote Agent**: Agent that receives and processes tasks - **Task**: Work request with ID, status, and result - **Message**: Direct communication between agents ## API Reference ``` POST /a2a/agents/register - Register agent GET /a2a/agents/{id} - Get agent info GET /a2a/agents/{id}/card - Get Agent Card POST /a2a/messages - Send message POST /a2a/tasks - Submit task GET /a2a/tasks/{id} - Get task status GET /a2a/tasks/{id}/result - Get task result ``` ## Examples ### Python Usage ```python from a2a import A2AClient client = A2AClient("https://remote-agent.com/a2a", api_key="your-key") # Send message client.send_message("target-agent-id", "Hello!") # Submit task task_id = client.submit_task("target-agent-id", "Do X") result = client.get_result(task_id) ``` ## Requirements - Python 3.8+ - requests library - sseclient-py (for streaming) ## License MIT

Frequently asked questions

A2a Protocol