LookTwice

Business-input validation: email checks (syntax, MX, disposable), EU VAT via the official VIES service, IBAN structure + MOD-97, domain DNS/TLS/RDAP, and evidence-backed U.S. CPSC product recall screening.

GitHub

Documentation

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.

Setup

Create a LookTwice account at looktwice.dev — new workspaces receive 100 trial API units.
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

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