SMS Validator — Mobile & SMS Readiness Check

SMS-capable phone validation API for AI agents.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Sms Validate Number: Use this when you need to check if a phone number can receive SMS messages. Returns SMS capability data in JSON. Returns: 1. canReceiveSMS (boolean) 2. carrierType (mobile/landlin

What data it sees

Do you need an account

No: the server works without sign-in

SMS-capable phone validation API for AI agents. Verify if a phone number can receive SMS messages: mobile vs landline detection, carrier type identification, E.164 format normalization, and SMS delivery readiness.

Tools: sms_validate_number.

Use this BEFORE sending SMS notifications, 2FA codes, or marketing messages. Saves cost by filtering out landlines and invalid numbers. For general phone validation without SMS check, use phone_validate_number instead.

Returns: {smsCapable, lineType, carrier, e164}. No API key required — x402 micropayment $0.002/call on Base L2.

How to connect

How to connect SMS Validator — Mobile & SMS Readiness Check to Claude

The server address to paste into Claude settings:

https://sms-validator--axel-belfort.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect SMS Validator — Mobile & SMS Readiness Check to ChatGPT

The server address to paste into ChatGPT settings:

https://sms-validator--axel-belfort.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect SMS Validator — Mobile & SMS Readiness Check to Cursor

The server address to paste into Cursor settings:

https://sms-validator--axel-belfort.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (1)

Raw names from tools/list. Only developers need these.

sms_validate_numberUse this when you need to check if a phone number can receive SMS messages. Returns SMS capability data in JSON. Returns: 1. canReceiveSMS (boolean) 2. carrierType (mobile/landline/voip) 3. e164 form