How do I install Looktwice?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Looktwice need an API key?

The publisher lists these environment variables: LOOKTWICE_API_KEY, LOOKTWICE_BASE_URL.

What transport does Looktwice use?

Looktwice runs locally over stdio.

When was Looktwice last checked?

Last checked 2026-11-09. Email, EU VAT, IBAN, and domain validation plus evidence-backed U.S. CPSC recall screening.

Looktwice MCP server

Power your agent

Add this server

The publisher's own command. Not a PlugMCP endpoint.

Add to Cursor Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Local command

npx -y [email protected]

Credentials from the publisher

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

Claude Code has no install link for a local command. Copy the command below and run it in a terminal.

shClaude Code

1LOOKTWICE_API_KEY=<secret> LOOKTWICE_BASE_URL=<value> claude mcp add io.github.eason4kim-rocket-looktwice-mcp -- npx -y looktwice-mcp@0.1.1

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "io.github.eason4kim-rocket-looktwice-mcp": {4      "command": "npx",5      "args": [6        "-y",7        "[email protected]"8      ],9      "env": {10        "LOOKTWICE_API_KEY": "<secret>",11        "LOOKTWICE_BASE_URL": "<value>"12      }13    }14  }15}

claude_desktop_config.json

Local · npmPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Local

Transport: stdio
Version: 0.1.1
API key

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Questions

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

Add this server

Host a copy with our keys and logs.

Server facts

Tools

Questions

How do I install Looktwice?

Does Looktwice need an API key?

What transport does Looktwice use?

When was Looktwice last checked?

Documentation

looktwice-mcp

Setup

Tools

Compared with a single-purpose MCP

Honest boundaries

Environment variables

License