x402basequality 0.35

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/transfers/20

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/20` is listed as "Premium API Access" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or subscriptions are required — 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 priced at $0.02 per request.

The specific functionality of the `/api/v1/transfers/20` endpoint is not documented beyond its "Premium API Access" label. The endpoint accepts POST requests and returns application/json. Payment is settled in USDC on Base to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout window.

Capabilities

x402-paymentpay-per-requestusdc-base-networkno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium API services without creating accounts or managing API keys
  • —Making one-off API calls with instant crypto payment on Base
  • —Agent-driven workflows that need frictionless pay-per-use endpoints

Fit

Best for

  • —Developers wanting zero-signup API access
  • —AI agents that can settle payments via x402 protocol
  • —Users who prefer per-call pricing over subscriptions

Not for

  • —Users who need free or ad-supported API access
  • —High-volume consumers who would benefit from bulk pricing
  • —Users without USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transfers/20 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transfers/20
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear, but there is no documentation of what the endpoint actually returns, no request/response schema, and the docs/pricing/README pages all render only a wallet-connect prompt with no useful content. The specific purpose of '/api/v1/transfers/20' beyond 'Premium API Access' is unknown.

Warnings

  • —No documentation available — docs, pricing, and README pages only show a wallet-connect prompt
  • —The specific functionality of /api/v1/transfers/20 is undocumented; 'Premium API Access' is the only description
  • —No OpenAPI spec, no request/response schema provided
  • —Cannot verify what data or service is actually delivered after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 14:08:50Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/w54SPL
Pay-per-call API platform on Base network via x402 — $0.02/request, no API keys required. — Clawmart · Clawmart