Address Validator API
Parse and validate postal addresses -- country detection, component split, postal code verification. US/UK/FR/DE. 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": {
"address-validator": {
"url": "https://address-validator.api.klymax402.com/mcp"
}
}
}
Quickstart -- HTTP (x402)
curl -X POST "https://address-validator.api.klymax402.com/api/validate" \
-H "Content-Type: application/json" \
-d '{"address":"0x0000000000000000000000000000000000dEaD"}'
# -> 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
address_validate
Use this when you need to parse, validate, or normalize a postal address. Returns structured address components in JSON.
Parameters
Example response:
{"address":"123 Main St, New York, NY 10001","valid":true,"components":{"street":"123 Main St","city":"New York","state":"NY","postalCode":"10001","country":"United States"},"normalizedAddress":"123 Main St, New York, NY 10001, US","detectedCountry":"United States","postalCodeValid":true,"confidence":0.95}
When to use: CRM data cleaning, e-commerce checkout validation, shipping address normalization, and KYC address verification.
Not for: phone validation (use phone_validate_number), email validation (use email_verify_address), PII detection in text (use compliance_detect_pii).
Example agent prompts
- "Parse, validate, or normalize a postal address"
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)
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