Summary
This server validates phone numbers globally using the phone-validation API at klymax402.com, exposing carrier detection, line type identification, country lookup, and E.164 formatting. It integrates x402 micropayments in USDC, so you're paying per validation request rather than subscribing to a monthly plan. Reach for this when you need to verify phone numbers in user input, clean up contact databases, or determine whether a number is mobile or landline before sending SMS. The remote SSE transport means it runs externally and bills as you use it. If you're building customer onboarding flows or contact verification systems and want global phone intelligence without maintaining your own validation infrastructure, this handles the heavy lifting.
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Tools
Public tool metadata for what this MCP can expose to an agent.
2 tools
phone_validate_numberUse 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 4.1 params
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.
Parameters* required
phonestringPhone number to validate (e.g. +33612345678, +14155552671, 0033612345678)
phone_validate_batchUse 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 and1 params
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
Parameters* required
phonesarrayArray of phone numbers to validate (max 50)
Phone Number Validation API
Validate phone numbers worldwide -- carrier, line type, country, E.164 format. Single and batch (50) modes. 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": {
"phone-validation": {
"url": "https://phone-validation.api.klymax402.com/mcp"
}
}
}
Quickstart -- HTTP (x402)
curl "https://phone-validation.api.klymax402.com/api/validate?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 |
|---|---|---|---|---|
phone_validate_number | GET | /api/validate | $0.008 | Validate a phone number and get carrier/type/country info |
phone_validate_batch | POST | /api/validate/batch | $0.035 | Validate up to 50 phone numbers in a single batch request |
phone_validate_number
Use this when you need to validate a phone number and get carrier info. Returns structured validation data in JSON.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
phone | string | yes | Phone number to validate (e.g. +33612345678, +14155552671, 0033612345678) |
Example response:
{"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"}
When to use: sending SMS or calling a number, FOR CRM data cleaning, lead validation, fraud detection, and KYC phone verification.
Not for: SMS capability check (use sms_validate_number), email validation (use email_verify_address), person data (use person_enrich_from_email).
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.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
phones | array | yes | Array of phone numbers to validate (max 50) |
Example response:
{"results":[{"phone":"+14155551234","valid":true,"e164":"+14155551234","countryCode":"US","carrier":"T-Mobile","lineType":"mobile"},{"phone":"invalid","valid":false}],"total":2,"validCount":1}
When to use: bulk CRM cleaning, importing contact lists, deduplication pipelines, and batch lead validation.
Not for: single numbers (use phone_validate_number), SMS capability (use sms_validate_number).
Example agent prompts
- "Validate a phone number and get carrier info"
- "Validate multiple phone numbers at once (up to 50)"
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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Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
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