x402basequality 0.25

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/81

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/81` is listed as "Premium API Access" and returns a 402 challenge requiring payment of up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform advertises multiple API categories including 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 priced at $0.02 per request.

However, the specific endpoint being listed here (`/api/v1/transfers/81`) is labeled only as "Premium API Access" and does not appear in the site's publicly listed API catalog. Its actual functionality is unclear — it may be a transfer or transaction-related endpoint, but no documentation, request schema, or response schema is available. The docs, pricing, and API pages all returned only a "Connect wallet" prompt with no further content.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyhttp-post

Use cases

  • —Accessing a premium API endpoint with per-request USDC micropayments on Base
  • —Integrating x402-compatible agent workflows that pay per call without API keys
  • —Testing x402 protocol payment flows against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need keyless, pay-per-use API access on Base
  • —Low-volume consumers who prefer per-request pricing over subscriptions

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —High-volume production workloads where $0.02/request adds up quickly
  • —Anyone who cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transfers/81 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/81
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the specific endpoint's functionality is undocumented. The docs pages returned only wallet-connect prompts with no usable content.

Warnings

  • —The endpoint /api/v1/transfers/81 is not listed in the site's public API catalog — its actual functionality is unknown.
  • —No request or response schema is available; callers cannot know what to send or what to expect back.
  • —All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no content.
  • —The platform's broader API offerings (AI, analytics, finance, etc.) are advertised but unverified — it is unclear whether they are functional.

Citations

Provenance

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

Agent access

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