{
  "markdown": "# SMS Validator API\n\n[![MCP Server](https://img.shields.io/badge/MCP-server-blue)](https://sms-validator.api.klymax402.com/mcp)\n[![x402](https://img.shields.io/badge/payments-x402-6E56CF)](https://x402.org)\n[![License: MIT](https://img.shields.io/badge/license-MIT-green)](LICENSE)\n\nValidate 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.\n\nPart of the [klymax402](https://klymax402.com) marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.\n\n## Quickstart -- MCP\n\nAdd to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):\n\n```json\n{\n  \"mcpServers\": {\n    \"sms-validator\": {\n      \"url\": \"https://sms-validator.api.klymax402.com/mcp\"\n    }\n  }\n}\n```\n\n## Quickstart -- HTTP (x402)\n\n```bash\ncurl -X POST \"https://sms-validator.api.klymax402.com/api/validate\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"phone\":\"...\"}'\n# -> 402 Payment Required, with an x402 payment challenge in the response body\n```\n\nAny 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.\n\n## Tools\n\n| Tool | Method | Path | Price | Description |\n|---|---|---|---|---|\n| `sms_validate_number` | POST | `/api/validate` | $0.005 | Validate if a phone number can receive SMS |\n\n### `sms_validate_number`\n\nUse this when you need to check if a phone number can receive SMS messages. Returns SMS capability data in JSON.\n\n**Parameters**\n\n| Name | Type | Required | Description |\n|---|---|---|---|\n| `phone` | string | yes | Phone number with country code (e.g. +14155551234) |\n| `countryCode` | string | no | ISO 3166-1 alpha-2 country code hint (e.g. US, FR, GB) |\n\nExample response:\n\n```json\n{\"phone\":\"+14155551234\",\"canReceiveSMS\":true,\"carrierType\":\"mobile\",\"e164\":\"+14155551234\",\"countryCode\":\"US\",\"numberType\":\"mobile\",\"carrier\":\"T-Mobile\"}\n```\n\n**When to use**: sending SMS campaigns, FOR filtering landlines from SMS lists, verifying 2FA phone numbers, and OTP delivery validation.\n\n**Not for**: full phone validation with carrier lookup (use `phone_validate_number`), email validation (use `email_verify_address`), address validation (use `address_validate`).\n\n## Example agent prompts\n\n- \"Check if a phone number can receive SMS messages\"\n\n## Payment\n\n- Protocol: [x402](https://x402.org) -- HTTP-native pay-per-call, no signup, no API key\n- Network: Base L2 (`eip155:8453`)\n- Asset: USDC\n- Facilitator: Coinbase CDP (primary), PayAI (fallback)\n- Also reachable via [ATXP](https://atxp.ai) (OAuth-wrapped x402, RFC 9728 protected-resource metadata)\n\n## Part of klymax402\n\n100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.\n\n- Catalog: https://klymax402.com/llms.txt\n- Full API reference: https://klymax402.com/llms-full.txt\n- Live stats: https://klymax402.com/stats\n\n## License\n\nMIT\n",
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  "sha": "ca96ebabe629961bd9d1ff5721ad34063408dd88859705830fbcb6acb1e2f955",
  "repo_slug": "br0ski777/sms-validator-x402",
  "fonte": "repo",
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  "api": "https://agentalog.com/api/listings/mcp_io_github_br0ski777_sms_validator_d66f52bf/readme"
}