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/transfers/52

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/transfers/52` 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 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.

This particular endpoint (`/api/v1/transfers/52`) falls under "Premium API Access" but its specific functionality is not documented beyond that label. The docs, pricing, and API pages all appear to require a wallet connection and provide no additional detail. The endpoint accepts POST requests and returns `application/json`. Payment is settled in USDC on Base to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Programmatic access to premium API functionality with per-call USDC micropayments
  • —Agent-driven workflows that need keyless, on-demand API access
  • —Testing x402 payment flows on Base network

Fit

Best for

  • —Developers wanting zero-signup, pay-as-you-go API access
  • —AI agents that can settle x402 payments autonomously
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users who need detailed API documentation before integrating
  • —High-volume consumers who want bulk pricing or subscriptions
  • —Developers who cannot transact in USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transfers/52 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/52
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 documentation of what this specific endpoint actually does, no request/response schema, and no examples. The docs/pricing/API pages all render only a wallet-connect prompt with no useful content. The 'Premium API Access' label is generic and uninformative.

Warnings

  • —The specific functionality of /api/v1/transfers/52 is undocumented — 'Premium API Access' is the only description available.
  • —All documentation pages (docs, pricing, API, README) render only a wallet-connect prompt with no substantive content.
  • —No request body schema or response schema is provided, making integration difficult without trial and error.
  • —The endpoint path suggests a transfer operation but details are unknown — exercise caution.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:17:46Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/Kw9TyL
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart