x402basequality 0.30

x402-gated product inventory endpoint on Base, pay-per-call with USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/31/inventory

What it does

This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 31) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, infrastructure utilities, and more — all settled on the Base network using USDC.

The specific endpoint `/api/v1/products/31/inventory` is listed as "Premium API Access" and accepts HTTP POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). 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 description of what the inventory data actually contains or what fields the POST body expects. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what payload to send or what response structure to expect.

Capabilities

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

Use cases

  • —Querying product inventory data for product ID 31 via a single paid request
  • —Integrating pay-per-call inventory checks into automated agent workflows
  • —Demonstrating x402 protocol usage for micro-payment gated endpoints

Fit

Best for

  • —Developers experimenting with x402 payment protocol on Base
  • —Agents needing on-demand inventory data without subscription commitments
  • —Low-volume, pay-as-you-go API consumption

Not for

  • —Production use cases requiring documented request/response schemas
  • —High-volume inventory queries where per-call pricing is inefficient
  • —Users who need detailed API documentation before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/31/inventory \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/31/inventory
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, confirming it works. However, there is no OpenAPI schema, no request/response examples, no documentation beyond a wallet-connect prompt, and the purpose of the 'Premium API Access' / product inventory endpoint is entirely opaque. Effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
  • —No OpenAPI or JSON schema describing request body or response format
  • —Purpose and data returned by /api/v1/products/31/inventory is undocumented
  • —The endpoint name 'Premium API Access' is generic and does not describe actual functionality

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:51:07Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/KC5kuS
x402-gated product inventory endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart