x402basequality 0.30

x402-gated premium API access on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/cards/96

What it does

This endpoint at lowpaymentfee.com is part of a suite of x402-protocol pay-per-call APIs hosted on the Base network. The specific resource `/api/v1/cards/96` is labeled "Premium API Access" and accepts POST requests gated by an x402 payment challenge. Payment is settled in USDC (contract 0x8335…2913) on Base, with a maximum amount of 20,000 base units — equivalent to $0.02 per request (USDC uses 6 decimals). No API keys, subscriptions, or rate limits are advertised; callers simply attach an X-PAYMENT header to each request.

The broader lowpaymentfee.com 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 are priced at $0.02 per request. However, the specific `/api/v1/cards/96` endpoint does not clearly map to any of these documented categories, and no schema or documentation describes its request body or response format.

The endpoint is live and returns a well-formed x402 challenge (HTTP 402) when called without payment. Documentation pages beyond the landing page are essentially empty (showing only "Connect wallet"), so details about input parameters, response structure, and actual functionality behind this particular endpoint remain unknown.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkno-api-keypost-endpoint

Use cases

  • —Programmatic access to a premium API resource with per-request USDC micropayments
  • —Agent-driven workflows that need keyless, on-demand API calls settled on Base
  • —Demonstrating x402 protocol integration for pay-per-use services

Fit

Best for

  • —Developers experimenting with x402 payment protocol on Base
  • —Agents that can attach x402 payment headers for per-call billing
  • —Low-volume, on-demand API consumption without subscription commitments

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/cards/96 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/cards/96
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation for the /api/v1/cards/96 resource — no input schema, no response schema, no description of what it actually returns. The docs, pricing, and README pages are all blank beyond a wallet-connect prompt. The endpoint's purpose ('Premium API Access') is entirely generic.

Warnings

  • —No documentation exists for the /api/v1/cards/96 endpoint — its actual functionality is unknown.
  • —All documentation pages (docs, api, pricing, README) are effectively empty, showing only 'Connect wallet'.
  • —The endpoint path '/api/v1/cards/96' does not correspond to any of the documented API categories on the landing page.
  • —No request or response schema is available; callers cannot know what to send or expect back.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:02:53Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/ZSzDNT
x402-gated premium API access on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart