roar-sdk 0.3.0

ROAR Protocol — Python SDK. Standalone implementation of the 5-layer agent communication standard.

roar-sdk

ROAR Protocol — Python SDK. 5-layer agent communication standard.

Design by @kdairatchi — ProwlrBot/roar-protocol

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Install

pip install roar-sdk                    # core: types, client, server (pydantic only)
pip install 'roar-sdk[http]'            # + httpx for HTTP transport
pip install 'roar-sdk[websocket]'       # + websockets transport
pip install 'roar-sdk[ed25519]'         # + Ed25519 signing (cryptography)
pip install 'roar-sdk[server]'          # + fastapi + uvicorn for serving
pip install 'roar-sdk[server,ed25519]'  # full stack

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Quick Start

from roar_sdk import AgentIdentity, ROARMessage, MessageIntent, ROARClient, ROARServer

# Layer 1: identity
agent = AgentIdentity(display_name="my-agent", capabilities=["code"])

# Layer 4: build and sign a message
msg = ROARMessage(
    **{"from": agent, "to": other},
    intent=MessageIntent.DELEGATE,
    payload={"task": "review"},
)
msg.sign("shared-secret")

# Layer 3: send over HTTP
client = ROARClient(agent, signing_secret="shared-secret")
response = await client.send_remote(
    to_agent_id=other.did,
    intent=MessageIntent.DELEGATE,
    content={"task": "review"},
)

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What's in the Box

Module	What it gives you
AgentIdentity, AgentCard	Layer 1 — W3C DID-based agent identity
AgentDirectory, SQLiteAgentDirectory	Layer 2 — in-memory and persistent discovery
ROARHub	Layer 2 — federated hub with REST API
DiscoveryCache	Layer 2 — TTL+LRU discovery cache
ROARClient, ROARServer	Layer 3 — HTTP client and server
create_roar_router	Layer 3 — FastAPI router (HTTP + WebSocket + SSE)
ROARMessage, MessageIntent	Layer 4 — unified message format
sign_ed25519, verify_ed25519	Layer 4 — asymmetric signing
DelegationToken, issue_token	Layer 4 — scoped capability grants
EventBus, StreamFilter	Layer 5 — real-time event streaming
IdempotencyGuard	Layer 5 — deduplication
DIDDocument, DIDKeyMethod, DIDWebMethod	Identity — W3C DID documents
AutonomyLevel, CapabilityDelegation	Identity — graduated autonomy model
MCPAdapter, A2AAdapter, ACPAdapter	Adapters — MCP, A2A, ACP bridges
detect_protocol	Adapters — auto-detect incoming protocol

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Server Example

from fastapi import FastAPI
from roar_sdk import AgentIdentity, MessageIntent, ROARMessage, ROARServer
from roar_sdk.router import create_roar_router

identity = AgentIdentity(display_name="code-reviewer", capabilities=["code-review"])
server = ROARServer(identity, signing_secret="shared-secret")

@server.on(MessageIntent.DELEGATE)
async def handle_delegate(msg: ROARMessage) -> ROARMessage:
    return ROARMessage(
        **{"from": server.identity, "to": msg.from_identity},
        intent=MessageIntent.RESPOND,
        payload={"review": "LGTM"},
        context={"in_reply_to": msg.id},
    )

app = FastAPI()
app.include_router(create_roar_router(server, rate_limit=60))
# uvicorn main:app --port 8089

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Protocol Adapters

from roar_sdk import MCPAdapter, A2AAdapter, ACPAdapter
from roar_sdk.adapters.detect import detect_protocol, ProtocolType

# Auto-detect incoming format
protocol = detect_protocol(raw_json)

if protocol == ProtocolType.MCP:
    msg = MCPAdapter.mcp_to_roar(tool_name, params, agent)
elif protocol == ProtocolType.A2A:
    msg = A2AAdapter.a2a_task_to_roar(task, sender, receiver)
elif protocol == ProtocolType.ACP:
    msg = ACPAdapter.acp_message_to_roar(acp_msg, ide, agent)

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Links

• PyPI
• Specification
• Architecture
• Examples
• Conformance tests