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Protocol Comparison

TechnologyPurposeWhat You Get
Google A2AAgent-to-agent specProtocol definition only
RabbitHoleA2A implementationWorking framework + tools
OpenAI APISingle provider agentsOpenAI models only
MCPLLM-to-tools protocolResource/tool access

RabbitHole is a production-ready Python framework that implements Googleโ€™s A2A Protocol.

Think of it this way:

  • Google A2A = The blueprint/specification
  • RabbitHole = The actual house built from that blueprint + furniture included

Key Point: RabbitHole doesnโ€™t compete with A2Aโ€”it makes A2A easy to use!


FeatureRabbitHoleGoogle A2AOpenAIMCP
TypeFrameworkSpecificationAPI ServiceProtocol
Ready to Useโœ… YesโŒ Spec onlyโœ… Yesโœ… Yes
Multi-Providerโœ… Yesโœ… DesignโŒ Noโœ… Yes
Agent โ†” Agentโœ… Coreโœ… CoreโŒ NoโŒ No
LLM โ†” Tools๐ŸŸก Planned๐ŸŸก Possibleโœ… Yesโœ… Core
Setup Time5 minutes2-4 weeksInstant30 minutes
Self-Hostedโœ… YesN/AโŒ Noโœ… Yes
Vendor Lock-inโœ… Noneโœ… NoneโŒ Yesโœ… None

Terminal window
git clone https://github.com/VinsmokeSomya/RabbitHole.git
cd RabbitHole && pip install -e ".[dev]"
cd rabbithole/agent/adk
cp .env.template .env # Add your API key
python __main__.py # Agent live on :10000

vs implementing A2A yourself: 2-4 weeks of development

from rabbithole.a2a.client import A2AClient
# All agents speak the same A2A protocol
google_agent = A2AClient("http://localhost:10000") # Gemini
openai_agent = A2AClient("http://localhost:10001") # GPT-4
custom_agent = A2AClient("http://localhost:10002") # Your model
# Use them together or separately
result = await google_agent.send_task("Analyze this data")
# Orchestrate specialized agents
research = await research_agent.send_task("Research AI trends")
draft = await writer_agent.send_task(f"Write article: {research}")
review = await qa_agent.send_task(f"Review: {draft}")
# โœ… Each agent uses its best provider
# โœ… All communicate via A2A
# โœ… No vendor lock-in
  • โœ… CLI Client - Test from terminal
  • โœ… Streamlit UI - Visual interface
  • โœ… Docker Setup - Deploy anywhere
  • โœ… Examples - Google ADK + OpenAI adapters
  • โœ… Streaming - Real-time updates (SSE)
  • โœ… Push Notifications - JWT-secured webhooks

Example: 1M tokens/day

ApproachMonthly Cost
OpenAI Only (GPT-4)~$300-900
RabbitHole (Gemini + GPT-4)~$10-100
Savings$200-800/month

Use cheaper models for routine tasks, expensive ones for critical work.


  • Building multi-agent systems
  • Need provider flexibility
  • Want self-hosted solution
  • Building production apps
  • Need rapid development
  • Want to build custom implementation
  • Have 2-4 weeks for development
  • Need deep protocol understanding
  • Only using OpenAI models
  • Single-agent apps
  • Quick prototypes (lock-in OK)
  • Focus on LLM-to-tool communication
  • Not building agent orchestration
  • Using Anthropic ecosystem
  • Enterprise AI infrastructure
  • Agent orchestration + tool access
  • Best of both worlds

What A2A Spec Provides:

  • Protocol definition
  • JSON-RPC method descriptions
  • Data model schemas

What RabbitHole Adds:

  • โœ… Working FastAPI server
  • โœ… All Pydantic models
  • โœ… Task lifecycle management
  • โœ… SSE streaming
  • โœ… JWT authentication
  • โœ… Client library
  • โœ… CLI & UI tools
  • โœ… Docker deployment
  • โœ… Multi-provider adapters

QuestionAnswer
What is RabbitHole?A2A implementation framework
Time to first agent?5 minutes vs 2-4 weeks
Multi-provider support?โœ… Yes (Google, OpenAI, Custom)
Vendor lock-in?โœ… None
Production ready?โœ… Yes

RabbitHole = A2A Made Easy + Multi-Provider + Production Tools ๐Ÿ‡๐Ÿš€