HTTP 402 + USDC pay-per-call API for AI agents. 16 endpoints (QR codes,
screenshots, OG images, PDFs, web scraping, WHOIS, YouTube transcripts, AI
summarization, plus a 4-endpoint crypto cluster — wallet balances, ENS
resolution, gas, coin prices). Two payment rails: x402 (autonomous USDC on
Base mainnet, no signup, no API key, server holds zero private keys) or
pre-paid credits ($1 = 5 calls via NowPayments). Hosted MCP server included.