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/160

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/160` is labeled "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0.02 USD) 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 lists 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 (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request. However, the specific functionality behind the `/api/v1/payments/160` endpoint is not documented beyond its "Premium API Access" label, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further detail.

Because the crawled documentation is essentially empty (only the landing page provides meaningful content), the actual input/output schemas, supported parameters, and concrete response formats for this endpoint remain unknown. Agents should treat this as a live x402 endpoint but be aware that the exact payload it expects and returns is undocumented.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-response

Use cases

  • —Programmatic pay-per-call access to API services without registration or API keys
  • —Agent-driven workflows that need on-demand API access settled in USDC on Base
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers exploring x402 payment protocol integrations
  • —AI agents that need keyless, pay-as-you-go API access
  • —Low-volume consumers who want no subscription commitments

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —High-volume production workloads requiring well-documented schemas and error handling
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/160 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/160
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but there is virtually no documentation: the docs, pricing, API, and README pages all render only 'Connect wallet'. The input/output schema, expected request body, and response format for this specific endpoint are completely unknown. Only the landing page provides any useful information.

Warnings

  • —Documentation pages (/docs, /api, /pricing, /README) are empty — only show 'Connect wallet'
  • —No input or output schema documented for /api/v1/payments/160
  • —The label 'Premium API Access' is generic and does not describe what the endpoint actually does
  • —No OpenAPI spec, no examples, no error documentation available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:33:46Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/Quqy96
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart