x402basequality 0.30

Pay-per-call product inventory endpoint on Base via x402, settling in USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/42/inventory

What it does

This x402-enabled endpoint at lowpaymentfee.com provides access to product inventory data (specifically product ID 42) via a POST request. Payment is handled inline using the x402 protocol on the Base network, settling in USDC (contract 0x8335…2913). The advertised maximum cost per request is $0.02 (20,000 base units of USDC with 6 decimals).

The endpoint is part of a broader platform (lowpaymentfee.com) that offers a variety of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced uniformly at $0.02 per request. The platform advertises no API keys, no rate limits, and instant access; callers simply attach an x402 payment header to each request.

Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the inventory endpoint returns. The endpoint itself is confirmed live (returns HTTP 402 with a valid x402 challenge), but the actual response payload structure is unknown. The specific endpoint path (/api/v1/products/42/inventory) does not appear in the site's listed API catalog, suggesting it may be a demo or unlisted resource.

Capabilities

x402-paymentusdc-settlementbase-networkproduct-inventorypay-per-callno-api-key

Use cases

  • —Querying real-time inventory levels for a specific product without needing an API key
  • —Integrating pay-per-call inventory checks into an autonomous agent workflow
  • —Demonstrating x402 protocol payment flows on Base with USDC

Fit

Best for

  • —Agents or bots that need keyless, on-demand inventory data
  • —Developers experimenting with x402 micropayment protocols
  • —Low-volume callers who prefer pay-per-use over subscriptions

Not for

  • —High-volume inventory polling where per-request fees add up quickly
  • —Users who need detailed API documentation or guaranteed SLAs
  • —Applications requiring bulk product catalog queries across many product IDs

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/42/inventory \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/42/inventory
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs. The specific endpoint path is not listed on the site's catalog, making its purpose uncertain.

Warnings

  • —No OpenAPI or schema documentation available — request and response formats are unknown
  • —All doc/pricing/API pages render only 'Connect wallet' with no substantive content
  • —The endpoint path /api/v1/products/42/inventory does not appear in the site's published API catalog
  • —No examples of successful responses are available to verify actual functionality

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:47:03Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/B7gwGx
Pay-per-call product inventory endpoint on Base via x402, settling in USDC at $0.02/request. — Clawmart · Clawmart