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a2a-protocol

Standardize agent-to-agent messaging with JSON-RPC 2.0 and a task state machine.

104|19|Updated Jul 15, 2025
Search Tags:#json-rpc#multi-provider#gateway#agent-to-agent#a2a#task-state-machine#provider-adapters
One-click install
npx skills add https://github.com/majiayu000/litellm-rs --skill a2a-protocol-majiayu000
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: a2a-protocol
Source: https://github.com/majiayu000/litellm-rs/tree/main/.claude/skills/a2a-protocol
Command: npx skills add https://github.com/majiayu000/litellm-rs --skill a2a-protocol-majiayu000

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

LiteLLM-RS A2A Protocol standardizes agent-to-agent communication to reduce integration complexity, enabling scalable collaboration among heterogeneous agents and providers.

Core Features & Use Cases

  • JSON-RPC 2.0 based messaging between clients, gateway, and agents.
  • Central Agent Registry with health checks, capabilities, and load balancing.
  • Multi-provider orchestration across LangGraph, Vertex AI, Azure AI, Bedrock, and more.
  • Task state machine with defined transitions and robust error handling.
  • Extensible provider adapters and streaming updates for real-time progress.

Quick Start

Deploy the A2A Gateway, register at least one agent with its endpoint and capabilities, and submit a TaskSend request to the gateway to initiate work.

Frequently Asked Questions about a2a-protocol

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I standardize agent-to-agent messaging across multiple providers?▼

Agent-to-agent messaging is standardized using a JSON-RPC 2.0 based protocol, which coordinates tasks across heterogeneous providers like LangGraph, Vertex AI, Azure AI, and Bedrock through a central gateway.

What is an A2A task state machine and how does it manage agent coordination?▼

An A2A task state machine manages agent coordination by defining specific task transitions and robust error handling, ensuring reliable work progression and status tracking across distributed agents.

How do I deploy a multi-provider gateway for agent orchestration?▼

To deploy a multi-provider gateway, register your agents with their endpoints and capabilities in the central Agent Registry, then submit a TaskSend request to the gateway to initiate orchestration.

Does the A2A protocol support streaming updates for real-time task progress?▼

Yes, the A2A protocol supports streaming updates to provide real-time task progress, utilizing extensible provider adapters and continuous JSON-RPC communication between the gateway and agents.

Can I use an agent registry with health checks for load balancing?▼

Yes, the central Agent Registry includes health checks and capability tracking, enabling effective load balancing and reliable routing across registered agents in the network.

When should I use JSON-RPC for inter-agent communication?▼

JSON-RPC should be used for inter-agent communication when you need a standardized messaging protocol to reduce integration complexity and enable scalable collaboration across heterogeneous agents.

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