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io.github.eason4kim-rocket/looktwice-mcp

Official registry Productivity

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

Source code 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).

NPM package looktwice-mcp
Claude Code 
claude mcp add looktwice-mcp -e 'LOOKTWICE_API_KEY=<your looktwice_api_key>' -e 'LOOKTWICE_BASE_URL=<LOOKTWICE_BASE_URL>' -- npx -y looktwice-mcp@0.1.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "looktwice-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "looktwice-mcp@0.1.1"
            ],
            "env": {
                "LOOKTWICE_API_KEY": "<your looktwice_api_key>",
                "LOOKTWICE_BASE_URL": "<LOOKTWICE_BASE_URL>"
            }
        }
    }
}

Environment variables

  • LOOKTWICE_API_KEY required secret LookTwice API key; create one at https://looktwice.dev/dashboard
  • LOOKTWICE_BASE_URL Override the API base URL (defaults to https://api.looktwice.dev)

Documentation

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

Contents
  1. looktwice-mcp
  2. Setup
  3. Tools
  4. Compared with a single-purpose MCP
  5. Honest boundaries
  6. Environment variables
  7. License

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

  1. Create a LookTwice account at looktwice.dev — verified accounts receive 100 free API units each month, no credit card required.
  2. Create an API key in the dashboard.
  3. Add the server to your MCP client configuration:
{
  "mcpServers": {
    "looktwice": {
      "command": "npx",
      "args": ["-y", "looktwice-mcp"],
      "env": {
        "LOOKTWICE_API_KEY": "lt_live_..."
      }
    }
  }
}

Tools

ToolWhat it doesCost
email_checkSyntax, MX, disposable, role, free-provider signals (no mailbox probing)2 units
vat_checkLive EU VIES validation with returned business data and request evidence1 unit
iban_checkCountry structure, length, and MOD-97 checksum (no account-existence claim)1 unit
domain_checkDNS, MX, TLS, and RDAP state for a registrable domainFree quota
cpsc_recall_matchEvidence-backed candidate matching against CPSC recalls and warnings3 units
credits_balanceCurrent workspace credit balanceFree

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

VariableRequiredDefault
LOOKTWICE_API_KEYYes—
LOOKTWICE_BASE_URLNohttps://api.looktwice.dev

License

MIT

Frequently asked questions

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?

It runs on your machine. In Claude Code: claude mcp add looktwice-mcp -e 'LOOKTWICE_API_KEY=<your looktwice_api_key>' -e 'LOOKTWICE_BASE_URL=<LOOKTWICE_BASE_URL>' -- npx -y looktwice-mcp@0.1.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.eason4kim-rocket/looktwice-mcp need an API key?

Yes. It expects LOOKTWICE_API_KEY, which you set in its configuration.

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

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

Who maintains io.github.eason4kim-rocket/looktwice-mcp?

It is published by eason4kim-rocket. 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.