SMS Validator API
Validate SMS-capable phone numbers — mobile vs landline, E.164 format. x402 micropayment.
Open source Repository Open in the app JSON README (API)
About
Validate SMS-capable phone numbers — mobile vs landline, E.164 format. x402 micropayment.
Details
- Kind
- MCP servers
- Topic
- Communication
- Publisher
- br0ski777
- Origin
- official
- Category
- ferramentas
- Transport
- sse
- Version
- 1.1.0
- Last push
- 2026-09-02T19:57:20Z
- Repository state
- ativo
- Language
- TypeScript
- License
- MIT
- Added
- 2026-08-29 03:01:43
- Updated
- 2026-08-29 03:01:43
- Origin id
io.github.Br0ski777/sms-validator
README
# SMS Validator API
[](https://sms-validator.api.klymax402.com/mcp)
[](https://x402.org)
[](LICENSE)
Validate SMS-capable phone numbers -- mobile vs landline detection, carrier type, E.164 format, SMS readiness. Pay-per-call via [x402](https://x402.org) (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the [klymax402](https://klymax402.com) 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.):
```json
{
"mcpServers": {
"sms-validator": {
"url": "https://sms-validator.api.klymax402.com/mcp"
}
}
}
```
## Quickstart -- HTTP (x402)
```bash
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`](https://www.npmjs.com/package/@x402/fetch), [`x402-agent-tools`](https://www.npmjs.com/package/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:
```json
{"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](https://x402.org) -- 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](https://atxp.ai) (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