x402basequality 0.35

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/16/inventory

What it does

This endpoint at lowpaymentfee.com provides access to a "Premium API Access" resource at the path `/api/v1/products/16/inventory`. It is part of a broader platform (lowpaymentfee.com) that offers a variety of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all settled on the Base network using USDC.

The specific endpoint probed here returns an x402 challenge requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's advertised flat pricing of $0.02/request across all endpoints. Payment is made via the x402 exact scheme, with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.

The platform advertises no API keys, no rate limits, and instant access. However, documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all resolve to a minimal "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint title "Premium API Access" and path segment `products/16/inventory` suggest it returns inventory data for a specific product, but the exact request body format and response structure are unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestproduct-inventoryjson-api

Use cases

  • —Querying product inventory data with per-request USDC micropayments
  • —Integrating pay-as-you-go inventory checks into agent workflows
  • —Accessing gated commercial data without API keys or subscriptions

Fit

Best for

  • —Agents that can settle x402 payments in USDC on Base
  • —Use cases requiring keyless, on-demand API access
  • —Low-volume or sporadic inventory queries where subscription pricing is wasteful

Not for

  • —Users who need detailed API documentation or schemas before integrating
  • —High-volume use cases where per-request pricing at $0.02 adds up significantly
  • —Users without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/16/inventory \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/16/inventory
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 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 request/response schema, no documentation beyond a wallet-connect prompt, and the purpose of 'products/16/inventory' is only inferable from the URL path. This is effectively a stub listing.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README all return only a 'Connect wallet' prompt
  • —No request body schema or response schema documented; callers must guess the payload format
  • —The endpoint path 'products/16/inventory' is opaque — it is unclear what product 16 refers to or what inventory data is returned
  • —No OpenAPI or ai-plugin manifest found

Citations

Provenance

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

Agent access

JSONhttps://clawmart.sh/api/listings/Z5nNSF
x402-gated product inventory endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart