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Validate SMS-capable phone numbers — mobile vs landline, E.164 format. x402 micropayment.
About
Validate SMS-capable phone numbers — mobile vs landline, E.164 format. x402 micropayment.
Remote endpoints: sse: https://sms-validator.api.klymax402.com/mcp
Security Report
Valid MCP server (1 strong, 0 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry. Trust signals: trusted author (164/169 approved); 6 highly-trusted packages.
1 tool verified · Open access · No issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Found in Source Code
Found by scanning the linked source code. This listing connects to a hosted endpoint, so none of this runs on your machine: it describes what the server software does where it is hosted.
How to Connect
Remote Plugin
No local installation needed. Your AI client connects to the remote endpoint directly.
Add this to your MCP configuration to connect:
{
"mcpServers": {
"io-github-br0ski777-sms-validator": {
"url": "https://sms-validator.api.klymax402.com/mcp"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
SMS Validator API
Validate SMS-capable phone numbers -- mobile vs landline detection, carrier type, E.164 format, SMS readiness. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
{
"mcpServers": {
"sms-validator": {
"url": "https://sms-validator.api.klymax402.com/mcp"
}
}
}
Quickstart -- HTTP (x402)
curl -X POST "https://sms-validator.api.klymax402.com/api/validate" \
-H "Content-Type: application/json" \
-d '{"phone":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body
Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
sms_validate_number | POST | /api/validate | $0.005 | Validate if a phone number can receive SMS |
sms_validate_number
Use this when you need to check if a phone number can receive SMS messages. Returns SMS capability data in JSON.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
phone | string | yes | Phone number with country code (e.g. +14155551234) |
countryCode | string | no | ISO 3166-1 alpha-2 country code hint (e.g. US, FR, GB) |
Example response:
{"phone":"+14155551234","canReceiveSMS":true,"carrierType":"mobile","e164":"+14155551234","countryCode":"US","numberType":"mobile","carrier":"T-Mobile"}
When to use: sending SMS campaigns, FOR filtering landlines from SMS lists, verifying 2FA phone numbers, and OTP delivery validation.
Not for: full phone validation with carrier lookup (use phone_validate_number), email validation (use email_verify_address), address validation (use address_validate).
Example agent prompts
- "Check if a phone number can receive SMS messages"
Payment
- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (
eip155:8453) - Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)
Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT
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