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/payments/273

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 at `/api/v1/payments/273` is labeled "Premium API Access" and charges 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, the specific functionality behind the `/api/v1/payments/273` endpoint is unclear. The description is simply "Premium API Access" with no further documentation about what data or service it returns. The docs, pricing, and API pages on the site all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no detailed documentation available from the crawl.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium API services with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need keyless API access with crypto micropayments
  • —Low-volume, on-demand API consumption without subscriptions

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —High-volume use cases where $0.02/request adds up significantly
  • —Users without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/273 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/273
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns 402 with a valid x402 challenge), and pricing is clear ($0.02 USDC on Base). However, there is no documentation about what this specific endpoint actually does, no OpenAPI schema, no request/response examples, and the site's docs pages are empty beyond a wallet connect prompt. The listing is effectively a stub.

Warnings

  • —No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content
  • —The specific functionality of /api/v1/payments/273 ('Premium API Access') is completely undocumented
  • —No OpenAPI schema or request/response examples available
  • —No information about what data or service is returned by this endpoint

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:48:37Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/6fLjCe
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart