English Français العربية

Crypto Link Check

Official registry Finance and payments

Check crypto links for phishing lookalikes of wallets, exchanges and dapps before wallet connect

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http crypto-link-check 'https://crypto-link-check.nextill-pos.workers.dev/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "crypto-link-check": {
            "type": "http",
            "url": "https://crypto-link-check.nextill-pos.workers.dev/mcp"
        }
    }
}
NPM package devx-link-check
Claude Code 
claude mcp add crypto-link-check -- npx -y devx-link-check@1.0.0 mcp
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "crypto-link-check": {
            "command": "npx",
            "args": [
                "-y",
                "devx-link-check@1.0.0",
                "mcp"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Crypto Link Check
  2. CLI
  3. MCP
  4. HTTP API
  5. Official-domain list
  6. Layout
  7. Guide

Is that MetaMask / Phantom / Ledger / exchange link real? Check it before you (or your agent) connect a wallet or sign anything.

October 2026 alone brought fake Phantom, Jupiter and Bitget browser extensions, a hijacked NGRAVE push alert that sent users to a seed-phrase page, and exchange phishing mails. AI agents can now trade from exchange accounts and pay for things on their own, so they click links too. This tool gives them (and you) a quick, read-only second opinion.

  • Free, offline: CLI and MCP server that compare a link with the official domains of ~60 wallets, exchanges and dapps and flag lookalike characters (0/o, rn/m, Cyrillic), typosquats, punycode, free hosting and bait words like "claim" or "sync".
  • Free API + remote MCP: https://crypto-link-check.nextill-pos.workers.dev
  • Paid full check (optional, 0.005 USDC via x402 on Base): adds domain registration age (RDAP), DNS, redirect tracing and one fetch of the page scanned for seed-phrase prompts and token-approval drainer code. 1-10 URLs per call.

It never asks for keys or seed phrases. Verdicts are heuristics, not guarantees.

CLI

npx devx-link-check phantorn.app metamask.io
# verdict: dangerous  phantorn.app
#   [danger] phantorn.app spells the official phantom.app with lookalike characters ...
# verdict: official  metamask.io

Exit code: 0 official / no red flags, 2 caution / suspicious / dangerous, 1 error. --json for machine output.

MCP

Local (stdio), runs offline:

{ "mcpServers": { "crypto-link-check": { "command": "npx", "args": ["-y", "devx-link-check", "mcp"] } } }

Remote (streamable HTTP, no key): https://crypto-link-check.nextill-pos.workers.dev/mcp

Tools: check_crypto_link(url) and full_report_info().

HTTP API

RoutePriceWhat
GET /api/basic?url=...freelexical verdict + findings
GET /v1/check?url=...&url=...0.005 USDC (x402 v2 exact, eip155:8453)full check, 1-10 URLs
GET /brands.jsonfreethe official-domain list we use
GET /openapi.json, /.well-known/x402.jsonfreediscovery

The paid route answers 402 with a PAYMENT-REQUIRED header; any x402 client can pay. Settlement happens only after the report is produced. Humans can pay from a browser wallet on the web page. Terms: /terms.

Verdicts: official, no_red_flags, caution, suspicious, dangerous. Same-name-different-TLD domains are only caution because the brand may own them.

Official-domain list

cli/src/brands.js. It is curated by hand and incomplete. PRs that add brands or official domains (with a source) are welcome.

Layout

  • cli/: npm package devx-link-check (CLI + stdio MCP)
  • worker/: the Cloudflare Worker behind the hosted API

MIT. Made by DevX. Contact madebydevx@gmail.com.

Guide

Frequently asked questions

What is Crypto Link Check?

Check crypto links for phishing lookalikes of wallets, exchanges and dapps before wallet connect

How do I install Crypto Link Check?

It runs as a remote server. In Claude Code: claude mcp add --transport http crypto-link-check 'https://crypto-link-check.nextill-pos.workers.dev/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Crypto Link Check need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Crypto Link Check open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Crypto Link Check?

It is published by devx-agent. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.