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Control
in a few lines

Wrap any agent in a single MOSS init call. Every action it takes is checked against policy before it leaves the process and signed with ML-DSA-44 as tamper-evident evidence. Your code runs the way it always did.

Free · 5 agents · 1,000 signed actions / month
governed_agent.py 
from moss_sdk import init

agent = init(
    api_key="moss_live_...",
    agent_subject="moss:agent:support-triage",
    declared_behavior={
        "allowed_actions": ["http_get", "email_send"],
        "allowed_destinations": ["https://api.crm.example"],
    },
)

# governed egress, denied calls never open a socket
resp = agent.get("https://api.crm.example/tickets")

with agent.action("email_send"):  # signed as evidence
    send_reply(resp)

agent.kill("done")  # flush + final signed record + exit
QUICKSTART

How integration works

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TWO WAYS TO INTEGRATE

Sign an output, or govern the whole agent

Signing SDK

moss-signing

Sign and verify any agent output. Each signature produces a public receipt anyone can verify offline — no access to MOSS required.

// npm install moss-signing
import { sign, verify } from "moss-signing";

const { envelope } = await sign(output, { agent: "order-bot" });
verify(envelope).valid   // true, offline

Agent Runtime SDK

moss-agent-sdk

Wrap an entire agent. Policy runs on every egress, backed by a heartbeat lease, an offline revocation cache, and a fail-closed kill switch.

agent = init(agent_subject="moss:agent:bot")

agent.get(url)        # governed egress
agent.kill("done")    # final signed record
INTEGRATIONS

Drops into your agent framework

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{{ i.install }}

MOSS also signs agentic commerce. UCP (Google/Shopify) and ACP (OpenAI/Stripe) checkout flows carry provenance for which agent performed each action.

SDKs

SDKs for your stack

Sign agent actions with ML-DSA-44 in Python and TypeScript, or drop governance straight into the framework you already build on.

SIGNING SDKS
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{{ k.install }}
Agent Runtime SDK
Full runtime governance — policy enforcement, a fail-closed kill switch, heartbeat lease, and offline revocation — for agents in production.
pip install moss-agent-sdk