x402-data-apis

x402 Data APIs — Agent Skill

An installable Agent Skill documenting three pay-per-call x402 APIs on Base mainnet (USDC), for any Claude Code / Agent-Skills-compatible AI agent:

• markdown-x402 — convert a URL/PDF/HTML/image to structured Markdown ($0.005/call)
• domain-parser — split a domain into TLD/SLD/subdomain ($0.001/call)
• domain-intelligence — DNS/RDAP/TLS domain lookups + MCP server ($0.001-$0.002/call)

No account, no API key, no subscription — each call is paid inline via the x402 protocol.

See SKILL.md for the full skill definition, and references/ for a per-service API reference.

Install

npx skills add NOVALYTH/x402-data-apis

Try it (no payment needed to see the challenge)

Every endpoint answers with a 402 Payment Required and an x402 payment challenge until a signed payment is attached — this alone is enough to confirm each service is live:

# markdown-x402 — convert a URL to Markdown
curl -i -X POST https://markdown-x402.nordman-tehau.workers.dev/convert \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com"}'

# domain-parser — split a domain into TLD/SLD/subdomain
curl -i -X POST https://domain-parser.nordman-tehau.workers.dev/v1/domain/parse \
  -H "Content-Type: application/json" \
  -d '{"domain": "sub.example.co.uk"}'

# domain-intelligence — DNS lookup (also has /rdap, /tls, /intelligence, and an MCP server at /mcp)
curl -i "https://domain-intelligence.nordman-tehau.workers.dev/dns?domain=example.com"

Any x402-aware HTTP client (e.g. @x402/fetch or the x402-fetch wrapper) will handle the challenge and retry with payment automatically.

Discovery

Each service publishes machine-readable metadata an agent can read before calling anything:

• GET /agent.json — endpoints, prices, input/output shapes
• GET /llms.txt — human/LLM-readable summary
• GET /.well-known/x402 — x402 discovery manifest (Bazaar-compatible)