What is io.github.eason4kim-rocket/looktwice-mcp?

Email, EU VAT, IBAN, and domain validation plus evidence-backed U.S. CPSC recall screening.

How do I install io.github.eason4kim-rocket/looktwice-mcp?

Clone io.github.eason4kim-rocket/looktwice-mcp from https://github.com/eason4kim-rocket/looktwice-mcp and configure it as an MCP server in your client (Claude Desktop, Cursor, or VS Code).

Is io.github.eason4kim-rocket/looktwice-mcp open source?

Yes, io.github.eason4kim-rocket/looktwice-mcp is open source under the MIT license. Source code is available at https://github.com/eason4kim-rocket/looktwice-mcp.

What category does io.github.eason4kim-rocket/looktwice-mcp belong to?

io.github.eason4kim-rocket/looktwice-mcp is listed under Developer Tools MCP servers on MCPFind.

io.github.eason4kim-rocket/looktwice-mcp — MCP Server for Developer Tools

looktwice-mcp

MCP (Model Context Protocol) server for the LookTwice API. Validate emails, EU VAT numbers, IBANs, and domains, and screen products against U.S. CPSC recalls and Product Safety Warnings — directly from Claude Desktop, Cursor, or any MCP client.

npx -y looktwice-mcp

Setup

Create a LookTwice account at looktwice.dev — verified accounts receive 100 free API units each month, no credit card required.
Create an API key in the dashboard.
Add the server to your MCP client configuration:

{
  "mcpServers": {
    "looktwice": {
      "command": "npx",
      "args": ["-y", "looktwice-mcp"],
      "env": {
        "LOOKTWICE_API_KEY": "lt_live_..."
      }
    }
  }
}

Tools

Tool	What it does	Cost
`email_check`	Syntax, MX, disposable, role, free-provider signals (no mailbox probing)	2 units
`vat_check`	Live EU VIES validation with returned business data and request evidence	1 unit
`iban_check`	Country structure, length, and MOD-97 checksum (no account-existence claim)	1 unit
`domain_check`	DNS, MX, TLS, and RDAP state for a registrable domain	Free quota
`cpsc_recall_match`	Evidence-backed candidate matching against CPSC recalls and warnings	3 units
`credits_balance`	Current workspace credit balance	Free

Compared with a single-purpose MCP

Most VAT or email MCP servers wrap one upstream. This server keeps the same evidence rules across email, VIES, IBAN, domain, and CPSC: timestamps, official sources, and no mailbox / account / safety claims.

Honest boundaries

email_check never claims a mailbox exists (mailbox_status: not_checked).
iban_check never claims an account exists or belongs to a person.
cpsc_recall_match returns screening candidates with official sources, not safety, legality, or compliance decisions.

Environment variables

Variable	Required	Default
`LOOKTWICE_API_KEY`	Yes	—
`LOOKTWICE_BASE_URL`	No	`https://api.looktwice.dev`

License

MIT

Set up in your AI client

AI clientOperating system

Merge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.

json

{
  "mcpServers": {
    "io-github-eason4kim-rocket-looktwice-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "looktwice-mcp"
      ]
    }
  }
}

Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.

Claude Desktop setup reference

Compatible MCP Clients

io.github.eason4kim-rocket/looktwice-mcp works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.

Claude Desktop~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.

Cursor~/.cursor/mcp.jsonRestart Cursor for changes to take effect.

VS Code.vscode/mcp.jsonReload VS Code window for changes to take effect.

Windsurf~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect.

Claude Code.mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.

io.github.eason4kim-rocket/looktwice-mcp