MCP server

Sentinel

org.448c/sentinel

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Pay-per-call safety checks for AI agents: screen a crypto address or URL before you transact.

At a glance

Type

MCP server

Publisher

448c.org (verified by the MCP Registry)

Status

Working at last check

Tools

2

Token cost

About 291 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http sentinel https://448c.org/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.sentinel]
url = "https://448c.org/mcp"

Gemini CLI

{"mcpServers":{"sentinel":{"httpUrl":"https://448c.org/mcp"}}}

Cursor

{"mcpServers":{"sentinel":{"url":"https://448c.org/mcp"}}}

VS Code

{"servers":{"sentinel":{"type":"http","url":"https://448c.org/mcp"}}}

Antigravity

agy mcp add sentinel https://448c.org/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"sentinel","server_url":"https://448c.org/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"sentinel","server_url":"https://448c.org/mcp"}

Tools

• check_address ~156 tokens
  Check whether a crypto address is safe to transact with. Screens OFAC sanctions + community scam lists and flags contract-vs-wallet. Returns verdict (safe/caution/avoid), 0-100 risk score, reasons, and sources.
• check_url ~135 tokens
  Check whether a URL or domain is a scam/phishing site. Screens the MetaMask crypto-phishing blocklist, domain age (RDAP), and lexical red flags. Returns verdict (safe/caution/avoid), 0-100 risk score, reasons, and sources.

Browse

• Crypto and blockchains

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