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Phone Number Validation API MCP Server

by br0ski777 Your server? Claim it
not responding

Phone Number Validation API is listed as active in the registry but did not answer our last check. It exposes 2 tools. Last commit 2 Sep 2026.

Validate phone numbers worldwide: carrier, line type, country, E.164. x402.

Uptime history 91 days of history · worst day 0%
91 days agonow
0.0%
Uptime 24h
0 of 91 checks
2
Tools
read from the server
35 ms
Response time
average over 24h
0
Stars
last commit 2 Sep 2026

Phone Number Validation API does not always answer

Over the last week it answered 0.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

run in your terminal
claude mcp add phone-validation --transport sse https://phone-validation.api.klymax402.com/mcp
Settings → Connectors → Add custom connector, then paste this address
https://phone-validation.api.klymax402.com/mcp
~/.codex/config.toml
[mcp_servers.phone-validation]
url = "https://phone-validation.api.klymax402.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "phone-validation": {
      "url": "https://phone-validation.api.klymax402.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "phone-validation": {
      "type": "sse",
      "url": "https://phone-validation.api.klymax402.com/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

phone
phone_validate_batch
Use this when you need to validate multiple phone numbers at once (up to 50). Returns an array of validation results in JSON. Returns per number: 1. valid (boolean) 2. e164 format 3. countryCode and countryName 4. carrier name 5. lineType (mobile/landline/voip/toll-free). Example output: {"results":[{"phone":"+14155551234","valid":true,"e164":"+14155551234","countryCode":"US","carrier":"T-Mobile","lineType":"mobile"},{"phone":"invalid","valid":false}],"total":2,"validCount":1} Use this FOR bulk CRM cleaning, importing contact lists, deduplication pipelines, and batch lead validation. Do NOT use for single numbers -- use phone_validate_number instead. Do NOT use for SMS capability -- use sms_validate_number instead.
phone_validate_number
Use this when you need to validate a phone number and get carrier info. Returns structured validation data in JSON. Returns: 1. valid (boolean) 2. e164 format string 3. countryCode and countryName 4. carrier name 5. lineType (mobile/landline/voip/toll-free) 6. localFormat and internationalFormat. Example output: {"valid":true,"e164":"+33612345678","countryCode":"FR","countryName":"France","carrier":"Orange","lineType":"mobile","localFormat":"06 12 34 56 78","internationalFormat":"+33 6 12 34 56 78"} Use this BEFORE sending SMS or calling a number, FOR CRM data cleaning, lead validation, fraud detection, and KYC phone verification. Do NOT use for SMS capability check -- use sms_validate_number instead. Do NOT use for email validation -- use email_verify_address instead. Do NOT use for person data -- use person_enrich_from_email instead.

Endpoints

URLTransportStateLatencyChecked
https://phone-validation.api.klymax402.com/mcp sse answering 35 ms 8 min ago

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Phone Number Validation API — questions

Answers built from our own checks of this server.

What can Phone Number Validation API do?
It exposes 2 tools, read directly from the server on our last check. Among them: phone_validate_batch, phone_validate_number. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Phone Number Validation API working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 35 ms. The bar chart above shows every period we have measured.
The registry lists Phone Number Validation API as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Phone Number Validation API?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Phone Number Validation API need an API key?
No. Phone Number Validation API completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.
Is Phone Number Validation API open source?
The code is open source: it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at phone-validation.api.klymax402.com, which runs on its operator's own terms.