x402basequality 0.30

Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/90

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/90` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys or rate limits are required; callers simply attach an x402 payment header to each request.

The broader platform advertises multiple API categories including 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 and settle in USDC on Base.

However, the specific functionality behind `/api/v1/products/90` ("Premium API Access") is not documented beyond its title. There is no OpenAPI schema, no request/response examples, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional content. The endpoint is live and responds with a valid x402 challenge, but what data or service it actually returns upon successful payment is unclear.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyno-rate-limitjson-response

Use cases

  • —Programmatic access to a premium API resource via x402 micropayments
  • —Agent-driven API consumption without pre-registration or API keys
  • —Paying per request in USDC on Base for on-demand data or services

Fit

Best for

  • —Developers or agents wanting zero-signup, pay-as-you-go API access
  • —x402-compatible wallets and agent frameworks on Base
  • —Low-cost micropayment API experimentation

Not for

  • —Users who need detailed documentation or guaranteed SLAs before purchasing
  • —Use cases requiring free or subscription-based access rather than per-call payments
  • —Anyone needing to know the exact response schema before paying

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/90 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/90
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but there is zero documentation on what the endpoint actually returns. No OpenAPI schema, no request/response examples, and the docs pages are empty beyond a wallet-connect prompt. The specific product (id 90) is not described anywhere on the site. Pricing is clear ($0.02 USDC on Base) but the service behind the paywall is opaque.

Warnings

  • —No documentation available — docs, pricing, and API pages render only 'Connect wallet' with no content
  • —The specific endpoint /api/v1/products/90 ('Premium API Access') has no description of what data or service it provides
  • —No OpenAPI or output schema beyond basic HTTP method info
  • —Cannot verify what response is returned after successful payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:19:31Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/BFGuZw
Pay-per-request API platform on Base network via x402 — $0.02/call in USDC. — Clawmart · Clawmart