Pay-per-call utility APIs for autonomous agents: web scraping and reading, search, weather, crypto and FX, DNS and email checks, geocoding, text tools and LLM completions. No account required: pay from $0.001 USDC on Base per request via x402. Free tier: 100 requests/day per IP on the REST door (browser traffic), 5 calls/day per IP on the MCP door, then HTTP 402 with an x402 price. Pro: $2.99/mo - 500 calls/day.
Data: x402-list.com (CC BY 4.0) Credit: 402 Index (MIT)
Unclaimed has 1 live API on PayAPI Market with 14 endpoints in total, in Finance: GadgetHumans API Hub.
Are Unclaimed's APIs verified?
Not yet. Unclaimed's listings are live and answer an x402 payment challenge, but PayAPI Market has not paid for a call to them, so none carries a settlement-verified badge.
How do I pay for Unclaimed's APIs?
Per request, in USDC, over the x402 protocol. An agent calls the endpoint, receives HTTP 402 with the price and wallet, pays and retries. There is no API key, account or subscription. Free to list. PayAPI takes 0% of each job, and Unclaimed is paid directly.