M2M Sentinel 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.

People who work with M2m and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in JavaScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-15 · ★ 2 · #179 OF 945 MAINTAINED OTHER · VERIFIED 2026-09-18

MIT · JavaScript servers · how we verify → /methodology

01 · Install M2M Sentinel

before you install - you'll need

Set M2M_SENTINEL_API_KEY before connecting.

Claude Code

claude mcp add m2m-sentinel-m2m-sentinel-sdk --transport http https://api.m2msentinel.com/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "m2m-sentinel-m2m-sentinel-sdk": {
      "url": "https://api.m2msentinel.com/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://api.m2msentinel.com/mcp

transport: streamable-http

endpoint alive - responded to MCP initialize · probed 2026-09-18

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions · remote - your agent's requests go to api.m2msentinel.com

endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect

repo age created 2026-08-16 - young repo, little track record yet

license MIT - declared in the repository

npm package @m2msentinel/sdk - the @m2msentinel scope differs from the repo owner (m2m-sentinel); confirm it's the project's official package

registry namespace io.github.M2M-Sentinel is GitHub-verified and matches the repo owner

03 · What M2M Sentinel can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v1.2.2 · 2026-08-28

What changed · Correct x402 v2 payment signing: the client reads the server's accepts offer, echoes accepted verbatim, preserves resource and extensions, and signs the demanded amount rather than a fallback. · Keeps…

v1.1.1 · 2026-08-16

Release v1.1.1 includes: · Production Coinbase AgentKit action provider (@m2mSentinelActionProvider) · Model Context Protocol (MCP) server executable CLI (bin: m2m-sentinel-mcp, m2m-sentinel) · Full TypeScript type…

04 · Who maintains M2M Sentinel

M2M Sentinel is maintained by m2m-sentinel. It's the only MCP server we track from this author; the repo dates to Aug 2026.

05 · Facts

repository: github.com/m2m-sentinel/m2m-sentinel-sdk
website: https://m2msentinel.com/
category: other - ranked #179 of 945 actively-maintained other servers as of 2026-09-18.
release cadence: 2 releases in the last 90 days (latest 2026-08-28)
registry: io.github.M2M-Sentinel/m2m-sentinel-sdk (active, first published 2026-08-24 · 3 versions)
packages: npm:@m2msentinel/sdk

06 · M2M Sentinel FAQ

What is M2M Sentinel?

Is M2M Sentinel still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-15 and it shipped 2 releases in the last 90 days. We re-verify nightly.

How do I install M2M Sentinel?

Run `npx -y @m2msentinel/sdk`. The README documents one environment variable (M2M_SENTINEL_API_KEY) to set first. Set M2M_SENTINEL_API_KEY before connecting. You can also paste the ready-made client config above.

Does M2M Sentinel require authentication?

No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-09-18; you can connect without credentials.

07 · Alternatives to M2M Sentinel

Alternatives to M2M Sentinel

Maintained other servers if M2M Sentinel isn't the fit.

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