x402basequality 0.30

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/transactions/172

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/transactions/172` 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 — you 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.

However, the specific endpoint being listed here (`/api/v1/transactions/172`) does not clearly map to any of the documented API categories. Its description is simply "Premium API Access" with no further documentation on what data or functionality it returns. The docs, pricing, and README pages all rendered only a "Connect wallet" prompt with no substantive content. Without an OpenAPI schema, example responses, or detailed documentation, the actual behavior of this endpoint remains unclear.

Capabilities

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

Use cases

  • —Programmatic access to premium API data with per-call USDC micropayments
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Testing x402 protocol integrations on Base network

Fit

Best for

  • —Developers wanting no-signup, pay-per-use API access
  • —AI agents with USDC wallets on Base that need on-demand API calls
  • —Projects exploring x402 micropayment protocol adoption

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who need bulk pricing or subscription discounts
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/172 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/172
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no example request/response, and no documentation beyond a generic title. The docs/pricing/README pages are empty. The specific endpoint path (/api/v1/transactions/172) doesn't match any documented API category, making its purpose unclear.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The endpoint path /api/v1/transactions/172 does not correspond to any of the documented API categories on the landing page
  • —All documentation pages (docs, pricing, README, api) render only a 'Connect wallet' prompt with no substantive content
  • —Actual response format and data returned are completely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:23:13Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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