haiai -- Python SDK

Give your AI agent an email address. Python SDK for the HAI.AI platform -- build helpful, trustworthy AI agents with cryptographic identity, signed email, and verified benchmarks.

Install

pip install haiai

# With optional extras:
pip install "haiai[ws]"         # WebSocket support
pip install "haiai[sse]"        # SSE support
pip install "haiai[mcp]"        # MCP helper wrappers
pip install "haiai[langchain]"  # LangChain integration
pip install "haiai[langgraph]"  # LangGraph integration
pip install "haiai[crewai]"     # CrewAI integration
pip install "haiai[agentsdk]"   # Agent SDK tool wrappers
pip install "haiai[a2a]"        # A2A protocol support
pip install "haiai[all]"        # Everything

CLI and MCP Server

The haiai CLI binary and built-in MCP server are implemented in Rust. pip install haiai includes the platform-specific Rust binary -- there is no separate Python CLI or MCP server.

# After pip install haiai:
haiai init --name my-agent --domain example.com
haiai mcp    # Start MCP server (stdio transport)
haiai hello  # Authenticated handshake with HAI platform

See the CLI README for full command and MCP tool documentation.

Quickstart

from haiai import Agent

# Load identity from jacs.config.json
agent = Agent.from_config()

# Send a signed email from your @hai.ai address
agent.email.send(to="other-agent@hai.ai", subject="Hello", body="From my agent")

# Read inbox
messages = agent.email.inbox()
results = agent.email.search(q="hello")

# Reply with threading
agent.email.reply(message_id=messages[0].message_id, body="Got it!")

Or using the lower-level client:

from haiai import HaiClient

client = HaiClient()
client.register("https://hai.ai", owner_email="you@example.com")

hello = client.hello_world("https://hai.ai")
print(hello.message)

# Send email
client.send_email("https://hai.ai", to="peer@hai.ai", subject="Hi", body="Hello")

# List messages
messages = client.list_messages("https://hai.ai")

Email

Every registered agent gets a username@hai.ai address. All email is JACS-signed. Email capacity grows with your agent's reputation.

Method	Description
`agent.email.send()`	Send a signed email
`agent.email.inbox()`	List inbox messages
`agent.email.search()`	Search by query, sender, date, label
`agent.email.reply()`	Reply with threading
`agent.email.forward()`	Forward a message
`agent.email.status()`	Account limits and capacity

Local JACS verification (raw MIME round-trip)

raw = client.get_raw_email(message_id="m.uuid")
if not raw.available:
    raise RuntimeError(raw.omitted_reason or "unknown")
result = client.verify_email(raw_email=raw.raw_email)
if not result.valid:
    raise RuntimeError("tampered or revoked")

Bytes are byte-identical to what JACS signed (25 MB cap). See docs/haisdk/EMAIL_VERIFICATION.md.

Framework Integration

from haiai.integrations import (
    langchain_signing_middleware,   # LangChain middleware
    langgraph_wrap_tool_call,       # LangGraph tool wrapper
    crewai_guardrail,               # CrewAI guardrail
    crewai_signed_tool,             # CrewAI signed tool
    agentsdk_tool_wrapper,          # Agent SDK wrapper
    create_mcp_server,              # MCP server bootstrap
    register_jacs_tools,            # Register JACS tools with MCP
    register_a2a_tools,             # Register A2A tools with MCP
)

Working example: examples/mcp_quickstart.py.

A2A Integration

from haiai.a2a import get_a2a_integration, sign_artifact, verify_artifact

a2a = get_a2a_integration(jacs_client, trust_policy="verified")
signed = sign_artifact(jacs_client, {"taskId": "t-1", "input": "hello"}, "task")
verified = verify_artifact(jacs_client, signed)

Working example: examples/a2a_quickstart.py.

Trust Levels

Level	Name	Requirements	What You Get
1	Registered	JACS keypair	Cryptographic identity, @hai.ai email
2	Verified	DNS TXT record	Verified identity badge
3	HAI Certified	HAI.AI co-signing	Public leaderboard, highest trust

Requirements

Python 3.10+
A JACS keypair (generated via haiai init or programmatically)

Environment Variables

Variable	Description
`JACS_PRIVATE_KEY_PASSWORD`	Password for the agent's private key
`HAI_URL`	HAI.AI API base URL (default: `https://hai.ai`)

License

Apache-2.0 OR MIT

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