x402basequality 0.30

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/28

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/products/28` is listed as "Premium API Access" and returns an x402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request.

This particular endpoint (`/api/v1/products/28`) does not appear in the site's publicly listed catalog, and its exact functionality is unclear — the description is simply "Premium API Access" with no further documentation. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional content. Without an OpenAPI schema, request/response examples, or detailed documentation, the actual behavior of this endpoint remains unknown.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing a pay-per-call API without needing to register or obtain API keys
  • —Making micropayments for API access using USDC on the Base network
  • —Programmatic agent-driven API consumption with x402 payment protocol

Fit

Best for

  • —Developers who want keyless, pay-as-you-go API access
  • —AI agents that can settle x402 payments autonomously
  • —Users already holding USDC on the Base network

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before purchasing
  • —Anyone without USDC on Base or unfamiliar with x402 payment flows

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/28 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/28
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns a valid 402 x402 challenge), but there is no OpenAPI schema, no request/response examples, and no documentation beyond a generic title. The docs pages render only a wallet-connect prompt. The specific functionality of /api/v1/products/28 is entirely unknown.

Warnings

  • —Endpoint /api/v1/products/28 is not listed in the site's public API catalog — its actual functionality is undocumented
  • —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content
  • —No OpenAPI schema, request body format, or response format is available
  • —The exact behavior behind 'Premium API Access' cannot be verified without making a paid request

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:22:24Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/pN8XFh
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC, no API keys required. — Clawmart · Clawmart