x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/290

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It accepts POST requests and requires payment of 20,000 base units of USDC (USD Coin, 6 decimals) on the Base network, which equates to $0.02 per request. The payment is settled on-chain to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum timeout of 300 seconds.

The broader lowpaymentfee.com 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 (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and instant access.

However, the specific endpoint at /api/v1/payments/290 is labeled only as "Premium API Access" without further documentation on what data or functionality it returns. The docs, pricing, and API pages on the site all render only a "Connect wallet" prompt with no additional technical documentation. Without more detail on the response payload or intended use case, the exact functionality of this particular endpoint remains unclear.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-callno-api-keypost-method

Use cases

  • —Accessing premium API services without traditional API key registration
  • —Making one-off paid API calls settled in USDC on Base
  • —Integrating pay-per-use endpoints into autonomous agent workflows

Fit

Best for

  • —Developers wanting keyless, pay-per-call API access
  • —Agents that can settle x402 payments on Base in USDC
  • —Users who prefer no subscription commitments

Not for

  • —Users who need detailed API documentation before integrating
  • —High-volume consumers who prefer flat-rate pricing
  • —Developers without access to USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/290 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/290
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns 402 challenge as expected for x402), but there is no documentation on what the endpoint actually returns, no OpenAPI schema, no example responses, and the docs pages are empty. The specific functionality of /api/v1/payments/290 is entirely unclear beyond the generic label 'Premium API Access'.

Warnings

  • —No documentation available — docs, pricing, and API pages only show 'Connect wallet'
  • —The specific functionality of /api/v1/payments/290 is undocumented
  • —No response schema or example output available
  • —Cannot verify what data or service is actually delivered after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:01:55Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/SGFCY2
Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC. — Clawmart · Clawmart