M2M Sentinel

M2M Sentinel SDK & MCP Server

Official multi-language client library, Model Context Protocol (MCP) server, and Coinbase AgentKit ActionProvider for M2M Sentinel — deterministic EVM bytecode capability observations and common-proxy resolution for autonomous applications operating on Base. Callers own transaction policy.

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⚡ 1. Model Context Protocol (MCP) Server

Connect M2M Sentinel directly to Claude Desktop, Cursor, Windsurf, or any MCP-compliant LLM agent.

Option A: 1-Click via Smithery

npx -y @smithery/cli mcp add M2M-Sentinel/m2m-sentinel-sdk --client claude

Option B: Local Stdio (claude_desktop_config.json)

{
  "mcpServers": {
    "m2m-sentinel": {
      "command": "npx",
      "args": ["-y", "m2m-sentinel-sdk"],
      "env": {
        "M2M_SENTINEL_API_KEY": ""
      }
    }
  }
}

Option C: Remote Streamable HTTP

• Current MCP endpoint: https://api.m2msentinel.com/mcp
• Legacy HTTP+SSE compatibility: https://api.m2msentinel.com/sse with messages at https://api.m2msentinel.com/messages

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🤖 2. Coinbase AgentKit Integration

import { AgentKit } from "@coinbase/agentkit";
import { m2mSentinelActionProvider } from "m2m-sentinel-sdk";

const agentKit = await AgentKit.from({
  walletProvider,
  actionProviders: [
    m2mSentinelActionProvider({
      apiKey: process.env.M2M_SENTINEL_API_KEY
    })
  ]
});

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📦 3. JavaScript / TypeScript Client

npm install m2m-sentinel-sdk

const { M2MSentinelClient } = require('m2m-sentinel-sdk');

const client = new M2MSentinelClient();

async function main() {
  const audit = await client.auditContract('0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913');
  console.log('Proxy Detected:', audit.audit.proxyResolution.isProxy);
  console.log('Proxy Target:', audit.audit.proxyResolution.targetAddress);
  console.log('Capabilities:', audit.audit.verdict.executableCapabilities);
  console.log('Evidence:', audit.audit.dissection.capabilities);
}

main().catch(console.error);

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🐍 4. Python Client

pip install m2m-sentinel

from m2m_sentinel import M2MSentinelClient

client = M2MSentinelClient()
audit = client.audit_contract("0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913")
print("Proxy detected:", audit["audit"]["proxyResolution"]["isProxy"])
print("Proxy target:", audit["audit"]["proxyResolution"].get("targetAddress"))
print("Capabilities:", audit["audit"]["verdict"]["executableCapabilities"])
print("Evidence:", audit["audit"]["dissection"]["capabilities"])

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Transaction-specific preflight example

The public repository includes a standalone, mock-only transaction boundary example at examples/transaction_preflight.js. From this repository root, run:

node examples/transaction_preflight.js

It observes one caller-supplied Base transaction, passes the observation to a caller-owned policy, and reaches only a mock signing/send callback. It refuses to continue on unverified evidence, unresolved execution, an observation mismatch, or a missing Diamond selector mapping. It never signs or sends a transaction; optional live mode uses only a caller-supplied API-key header and remains the caller's responsibility.

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💳 5. Autonomous x402 Micropayments (Headless M2M)

import { x402SignerClient } from "m2m-sentinel-sdk";

const client = new x402SignerClient({
  walletSigner: myAgentWallet,
  baseUrl: "https://api.m2msentinel.com"
});

const result = await client.request("/v1/audit/0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913");

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📜 License

MIT License. Copyright (c) 2026 M2M Sentinel.