x402-gated transaction receipt endpoint on Base, paying $0.02 in USDC per request.

This endpoint at lowpaymentfee.com provides access to a transaction receipt (resource ID 117) behind an x402 paywall. The site advertises itself as a platform hosting multiple pay-per-call API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.

The specific endpoint `/api/v1/transactions/117/receipt` returns a JSON response upon payment. The x402 challenge confirms the endpoint is live, accepting POST requests with an exact-payment scheme. The maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the receipt payload actually contains. The site's landing page lists many endpoints across different domains (sentiment analysis, summarization, geocoding, etc.), but without documentation it is unclear how functional or complete these services are. The lack of any detailed documentation or output schema beyond the x402 challenge significantly limits confidence in what this endpoint delivers.