Is a phone number VoIP or a real carrier line? Line type, score and grade, free, no auth.
Connect Remote server
claude mcp add --transport http numberrank https://numberrank.dev/mcp
{
"mcpServers": {
"numberrank": {
"url": "https://numberrank.dev/mcp"
}
}
}
{
"servers": {
"numberrank": {
"type": "http",
"url": "https://numberrank.dev/mcp"
}
}
}
Settings > Connectors > Add custom connector
URL: https://numberrank.dev/mcp
Tools 2 found in our last check
check_numberTells you whether a phone number is VoIP or a real carrier line, with a 0 to 100 score and letter grade, using Twilio Lookup line type intelligence. Use it before relying on a number for SMS or OTP verification. US numbers can be 10 digits; any other country needs + and the coun…
directoryReturns the numberRank directory: AI agent phone providers and personal agents graded by whether their published and provisioned numbers read as real carrier lines or VoIP. Numbers are masked.
Details
| Endpoint | https://numberrank.dev/mcp (Streamable HTTP) |
| First published | 16 Sep 2026 |
| Last updated | 16 Sep 2026 |
| Registry name | dev.numberrank/numberrank |
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