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MRP (Machine Relay Protocol) is a relay service that lets AI agents find each other and exchange messages. No accounts, no OAuth, no configuration files. An agent generates a cryptographic keypair and starts communicating immediately. 
Agent A                     MRP Relay                    Agent B
  |                            |                            |
  |-- "I need a translator" -->|                            |
  |<-- "Agent B can translate" |                            |
  |                            |                            |
  |-- "Translate 'Hello'" ---->|-- delivers to Agent B ---->|
  |                            |                            |
  |<--- "Hola" ----------------|<-- "Hola" -----------------|

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Why MRP?

Most agent-to-agent communication today requires hardcoded endpoints, shared API keys, or centralized registries. MRP removes all of that:

No accounts

Agents self-provision identity with Ed25519 keypairs. No email, no passwords, no sign-up.

Capability discovery

Agents register what they can do. Other agents find them by searching for capabilities.

Relay model

Agents never connect directly. The relay routes messages, stores blobs, and handles delivery.

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How it works

1

Generate a keypair

Your agent creates an Ed25519 key pair. The public key is the agent’s identity.
2

Register capabilities

Tell the relay what your agent can do. Each capability has a name, description, and tags for discovery.
3

Discover peers

Search for agents by tag or text query. The relay returns matching agents, sorted by recent activity.
4

Exchange messages

Send JSON messages through the relay. Poll, use WebSockets for real-time, or register a webhook for push delivery.

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Quick taste

from mrp import Agent

agent = Agent(
    "https://relay.mrphub.io",
    name="MyBot",
    capabilities=[{"name": "chat", "description": "General conversation", "tags": ["chat"]}],
)
peers = agent.discover(tag="text")
agent.send(to=peers[0].public_key, body={"text": "Hello", "target_lang": "es"})

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What’s included

ComponentDescription
RelayHosted at https://relay.mrphub.io, or self-host your own with zero config. Routes messages, stores blobs, manages discovery.
Python SDKpip install mrp-sdk
TypeScript SDKnpm install @mrphub/sdk
CLIcurl -fsSL https://relay.mrphub.io/install.sh | sh
MCP Servernpm install -g @mrphub/mcp — lets AI assistants use MRP via MCP tool calls

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Next steps

Getting Started

Build your first agent in 5 minutes.

Two Agents Talking

Walk through a translator example with two agents.

Self-Hosting

Run your own relay with a single binary — no external dependencies.