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LookupLab

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Phone carrier, email domain, IP network and DNS checks using your LookupLab account.

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 lookuplab 'https://lookuplab.io/api/mcp' --header 'X-API-Key: <Your LookupLab API key>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "lookuplab": {
            "type": "http",
            "url": "https://lookuplab.io/api/mcp",
            "headers": {
                "X-API-Key": "<Your LookupLab API key>"
            }
        }
    }
}

Documentation

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

Contents
  1. LookupLab integrations
  2. Claude web and Desktop
  3. Claude Code
  4. Gemini CLI
  5. Other MCP clients
  6. ChatGPT and Codex
  7. Tools and costs

LookupLab integrations

Phone carrier, email-domain, IP-network and DNS checks through LookupLab.

Find LookupLab on Smithery and in the official MCP Registry.

Claude web and Desktop

  1. Open Customize > Connectors > Add custom connector. Name it LookupLab and use https://lookuplab.io/api/mcp.
  2. Choose Sign in now and Register automatically if Claude shows authentication options. Leave a custom client ID and secret blank.
  3. On LookupLab's consent page, enter your LookupLab key and approve. Enable the connector in your chat. Try: "Check the mail records for example.com."

Your key goes only to LookupLab; Claude receives a revocable OAuth connection. On Team and Enterprise plans, an owner first adds the connector, then each member connects their account. See Claude's connector setup.

Claude Code

Set LOOKUPLAB_API_KEY privately in your environment, then merge claude-code.mcp.json into your project's .mcp.json. Start Claude Code in that project, approve LookupLab when prompted, and check /mcp. Keep the variable reference in the file; never replace it with a real key in a shared repository.

The config uses Claude Code's HTTP transport and environment expansion. Try: "Check the mail records for example.com."

Gemini CLI

Install with gemini extensions install https://github.com/PpiNeaPpLe/lookuplab-integrations. Supply your existing LookupLab API key in the extension's sensitive setting. Gemini stores this setting in its system keychain when available. Never put a key in a chat message.

Other MCP clients

Connect to https://lookuplab.io/api/mcp with Authorization: Bearer YOUR_API_KEY or X-API-Key: YOUR_API_KEY in the client's secure connection settings. The server uses Streamable HTTP with JSON responses and no SSE stream.

ChatGPT and Codex

The openai/ directory is the portable plugin package. OAuth needs an exact callback registered by LookupLab before the platform connection can run. This source package is not a claim of directory approval or publication.

Tools and costs

ToolChecksAccount credits
phone_lookupCarrier, line type; optional caller name1 for landline/VoIP/toll-free, 3 mobile/unknown; caller name adds 2
email_verifySyntax, MX and domain indicators1
ip_lookupApproximate location and network1
dns_checkMX, SPF, DMARC or DKIM1

The account needs enough balance for the maximum charge before the lookup runs. Failed/invalid results are not charged. Tools debit credits, so they are marked as operations with side effects. Duplicate calls may charge again unless your client sends a stable Idempotency-Key header for retries.

Data is not proof of a person's identity, ownership, consent to contact, guaranteed email delivery or precise location. Privacy flags can be unavailable. Supply only data you are authorized to check.

Privacy · Terms · Support

Frequently asked questions

What is LookupLab?

Phone carrier, email domain, IP network and DNS checks using your LookupLab account.

How do I install LookupLab?

It runs as a remote server. In Claude Code: claude mcp add --transport http lookuplab 'https://lookuplab.io/api/mcp' --header 'X-API-Key: <Your LookupLab API key>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does LookupLab need an API key?

Yes. It expects X-API-Key, which you set in its configuration.

Is LookupLab open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains LookupLab?

It is published by PpiNeaPpLe. 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.