# Domain Intelligence API

> Comprehensive domain analysis — WHOIS, DNS, SSL, tech stack, security headers, subdomains, and redirect chains for AI agents. 8 paid endpoints powered by x402 micropayments (USDC on Base).

## API Base URL

https://domain.hugen.tokyo

## Authentication

This API uses the x402 protocol for micropayments. Include a valid x402 payment header with each request. Payments are in USDC on Base chain (eip155:8453).

## Discovery

- Payment info: GET /.well-known/x402
- OpenAPI spec: GET /openapi.json

## Endpoints

### Standard ($0.005/request)
- GET /domain/whois?domain={domain} — WHOIS registration data with domain age
- GET /domain/dns?domain={domain} — Multi-resolver DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA + SPF/DMARC)
- GET /domain/ssl?domain={domain} — SSL/TLS certificate analysis with security grade
- GET /domain/tech?domain={domain} — Technology stack detection (Wappalyzer, 1000+ patterns)
- GET /domain/headers?domain={domain} — Security header audit (10 headers + info leakage)
- GET /domain/subdomains?domain={domain} — Subdomain discovery via Certificate Transparency
- GET /domain/redirect?url={url} — Redirect chain trace (max 10 hops, TLS downgrade detection)

### Enhanced ($0.01/request)
- GET /domain/full?domain={domain} — All 7 analyses combined with overall security grade

## Pricing

- Standard: $0.005 USDC per request (7 endpoints)
- Enhanced: $0.01 USDC per request (1 endpoint)
- Network: Base (eip155:8453)
- Payment: x402 protocol (USDC)