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/charges/72

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/72` 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 listed at the same $0.02/request price point.

However, this specific endpoint (`/api/v1/charges/72`) is labeled generically as "Premium API Access" and does not appear in the site's public endpoint catalog. There is no documentation, OpenAPI schema, or example request/response available for this particular resource. The crawled docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no additional content. Without knowing what this endpoint actually returns, callers should treat it as an opaque paid resource until further documentation is published.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-response

Use cases

  • —Programmatic access to a paid API resource without traditional API key signup
  • —Agent-driven workflows that need to pay per call using on-chain USDC
  • —Testing x402 protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —AI agents that can autonomously pay for API calls on Base
  • —Users who want no-signup, no-rate-limit API access

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —Anyone requiring free or subscription-based pricing models
  • —Production workloads that depend on well-documented response schemas

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/72 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/72
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 no OpenAPI schema, no documentation, no example requests or responses, and the specific endpoint /api/v1/charges/72 does not appear in the site's public catalog. The docs/pricing/API pages all render only a wallet-connect prompt with no useful content.

Warnings

  • —No documentation available — docs, pricing, and API pages render only 'Connect wallet' with no content
  • —This specific endpoint (/api/v1/charges/72) is not listed in the site's public API catalog
  • —No OpenAPI schema, no request/response examples, and no description of what this endpoint actually returns
  • —The platform's actual functionality behind these endpoints is unverified

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:08:14Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/Y43vpp
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart