x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/23

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/23` 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. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an x402 payment header to each request.

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 uniformly priced at $0.02 per request.

This particular endpoint (`/api/v1/products/23`) is labeled "Premium API Access" but the crawled material does not clarify what specific data or functionality it returns beyond the generic title. The docs, pricing, and README pages all rendered only a "Connect wallet" prompt with no additional documentation. Without an OpenAPI schema or response examples, the exact request/response format is unknown.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyhttp-post

Use cases

  • —Accessing premium API data without signing up for an account or managing API keys
  • —Making one-off paid API calls from autonomous agents using x402 USDC payments
  • —Integrating pay-as-you-go API access into workflows on the Base network

Fit

Best for

  • —Agents or developers who want zero-signup, pay-per-call API access
  • —x402-compatible clients on the Base network
  • —Low-volume or sporadic API usage where subscriptions are unnecessary

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscription plans

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/23 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/23
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no documentation beyond a landing page, no request/response examples, and the specific functionality of /api/v1/products/23 is unclear. The docs/pricing/README pages are empty beyond a wallet connect prompt.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The exact functionality and response format of /api/v1/products/23 ('Premium API Access') is undocumented
  • —All documentation pages (docs, pricing, README) returned only a 'Connect wallet' prompt with no content
  • —Cannot verify what data or service this endpoint actually provides

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 22:02:23Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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