Sentinel

org.448cPublished by 448c.orgOfficial publisherv0.0.1Updated Oct 24, 2026

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

VerifiedStreamable HTTPWeb executableFinanceSecurity & Monitoring

Overview

AI-generated overview

A remote MCP endpoint that lets an assistant run pay-per-call safety checks on a crypto address or URL before transacting.

What you can do
Sentinel is a hosted MCP server reachable at a remote endpoint. According to its registry description, it provides pay-per-call safety checks for AI agents, screening a crypto address or URL before a transaction is made. No tool list, README, or package is published, so the exact tool names, inputs, and result format are not documented in the supplied material.
When to use it
Consider it when an assistant workflow involves sending funds to a crypto address or opening an untrusted URL and you want a screening step before acting. Because the tool surface is undocumented, it is hard to judge fit beyond that stated purpose.
Requirements
A remote streamable HTTP MCP endpoint at the provider's host; no local runtime, package, environment variables, or headers are declared. The manifest declares no authentication, though the description says calls are paid, so a payment mechanism is presumably involved.
Before you install
The description states checks are pay-per-call, so using the server may incur charges; no pricing, billing method, or spending limit is documented. The manifest declares no authentication, so it is unclear how calls are attributed or paid for. The server receives the crypto addresses and URLs you submit, which are sent to a third party. No tool list or README is available to verify what it does with that data.

Installation

In SourceWeft

  1. Open Sentinel in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/org.448c%2Fsentinel/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

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

Tools

2

check_address

Check address safety

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.

Parameterschainaddressrequired

check_url

Check URL safety

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.

Parametersurlrequired

Version history

1
  1. v0.0.1LatestSep 16, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.