x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/102

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/charges/102` is labeled "Premium API Access" and requires a maximum of 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 listed at the same $0.02/request price point.

However, the specific functionality behind `/api/v1/charges/102` ("Premium API Access") is not documented beyond its title. The docs, pricing, and README pages all returned only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no detailed documentation available from the crawl. The endpoint is confirmed live — it returns a proper 402 challenge with x402 version 1 — but what data or service it actually returns upon successful payment is unknown.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyno-rate-limit

Use cases

  • —Accessing premium API data without traditional API key registration
  • —Making one-off paid API calls settled in USDC on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access

Fit

Best for

  • —Developers who want to avoid API key management and subscriptions
  • —AI agents that can settle x402 payments autonomously on Base
  • —Low-volume or sporadic API consumers who prefer per-call pricing

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before purchasing
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/102 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/102
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality behind 'Premium API Access' is completely undocumented. The docs/pricing/README pages returned no useful content.

Warnings

  • —The specific functionality of /api/v1/charges/102 ('Premium API Access') is not documented — it is unclear what data or service is returned upon payment.
  • —No OpenAPI schema, request body schema, or response examples are available.
  • —All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no substantive content.
  • —The endpoint name 'charges/102' suggests a generic or placeholder resource rather than a well-defined API service.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:22:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

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