x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/57

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/57` 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.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/transactions/57` endpoint actually returns. The endpoint is live (402 challenge confirmed), but without documentation it is unclear what data or functionality this specific route provides.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keypost-endpointjson-response

Use cases

  • —Accessing premium API data without managing API keys or subscriptions
  • —Making one-off paid API calls settled in USDC on Base
  • —Integrating pay-per-use endpoints into agent workflows via x402

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 schemas before integrating
  • —Anyone requiring high-volume, subscription-based pricing

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/57 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/57
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but documentation is essentially nonexistent — every doc page shows only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no explanation of what /api/v1/transactions/57 actually returns. The listing is effectively a stub.

Warnings

  • —No documentation available — all doc pages render only 'Connect wallet'
  • —No OpenAPI or request/response schema provided
  • —The specific purpose of /api/v1/transactions/57 ('Premium API Access') is unexplained
  • —Cannot verify what data or functionality this endpoint returns without paying

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:38:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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