Lookups for your AI.
Check a phone number, email, IP or domain in the tools you already use.
Connect
Add this remote MCP server to your client.
https://lookuplab.io/api/mcp
Use your client’s secure connection settings. Keep API keys out of conversations.
Claude
- Open Customize → Connectors → Add custom connector.
- Enter the server URL above. Choose Register automatically if asked.
- Connect with your LookupLab key on our secure consent page.
Works with Claude web and Desktop. Your key stays with LookupLab.
Claude Code and other API-key clients
Merge this into your project’s .mcp.json and set LOOKUPLAB_API_KEY privately in your environment. Approve the connection, then check /mcp in Claude Code.
{
"mcpServers": {
"lookuplab": {
"type": "http",
"url": "https://lookuplab.io/api/mcp",
"headers": { "X-API-Key": "${LOOKUPLAB_API_KEY}" }
}
}
}Other clients can use the same URL and an API key header in their secure settings. Setup guides
Four tools
| Tool | Checks |
|---|---|
phone_lookup | Carrier and mobile, landline or VoIP type |
email_verify | Syntax, mail records and disposable domains |
ip_lookup | Approximate location and network |
dns_check | MX, SPF, DMARC or DKIM records |
Questions
What does a check cost?
Phone checks use 1 credit for landline, VoIP or toll-free results, and 3 for mobile or unknown results. Caller name adds 2. Other checks use 1. Your account needs enough credits for the maximum possible charge before a check starts. Failed or invalid results are not charged.
Can I connect ChatGPT?
The server supports OAuth with explicit account consent. Directory publication is separate. A platform administrator must register its exact callback URL with LookupLab before connecting. Existing API-key clients keep working.
What are the limits of the data?
Carrier data does not verify a person's identity or their consent to calls or texts. Email checks inspect syntax and domain records, not mailbox ownership. IP location is approximate; some network/privacy fields may be unavailable.