x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/24/inventory

What it does

This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 24) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all settled on the Base network using USDC.

The specific endpoint `/api/v1/products/24/inventory` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (asset 0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform's landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and no minimum commitments required.

Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples available. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what request body the inventory endpoint expects or what shape the response takes. The endpoint's title "Premium API Access" is generic and does not describe the actual functionality.

Capabilities

x402-paymentusdc-settlementbase-networkproduct-inventorypay-per-requestno-api-keyjson-response

Use cases

  • —Querying inventory status for a specific product via a single micropayment
  • —Integrating pay-per-call inventory checks into an agent workflow without managing API keys
  • —Programmatic inventory lookups settled on-chain via Base USDC

Fit

Best for

  • —Agents needing one-off inventory lookups without subscription overhead
  • —Developers experimenting with x402 payment-gated APIs
  • —Use cases where no-auth, pay-as-you-go access is preferred

Not for

  • —High-volume inventory polling where per-request fees add up quickly
  • —Users who need detailed API documentation or request/response schemas before integrating
  • —Non-crypto users who cannot settle payments in USDC on Base

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/24/inventory \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/24/inventory
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation beyond a wallet-connect prompt, no request/response schema, and no examples. The endpoint name 'Premium API Access' is generic and uninformative. Effectively a stub listing.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'
  • —No OpenAPI or schema definition found; request body format and response shape are unknown
  • —Endpoint description 'Premium API Access' is generic and does not describe actual functionality
  • —The specific purpose of product ID 24's inventory data is unclear

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 23:48:07Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/4Ww5za
x402-gated product inventory endpoint on Base, pay-per-request with USDC. — Clawmart · Clawmart