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/27/inventory

What it does

This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 27) via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance, and utility services — all gated behind x402 micropayments settled in USDC on the Base network.

The specific endpoint `/api/v1/products/27/inventory` is listed as "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform advertises uniform $0.02/request pricing across all its endpoints, with no API keys, no rate limits, and no minimum commitments required.

Documentation on the site is extremely sparse — the docs, API, pricing, 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 difficult to know what data is returned or what input parameters are accepted.

Capabilities

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

Use cases

  • —Querying inventory status for a specific product via micropayment
  • —Integrating pay-per-request product data into an agent workflow
  • —Accessing product inventory without API key registration

Fit

Best for

  • —Agents that need on-demand product inventory data with no signup
  • —Developers exploring x402 micropayment-gated APIs
  • —Use cases requiring low-cost, no-commitment API access on Base

Not for

  • —Users who need detailed API documentation or schema before integrating
  • —High-volume inventory queries where per-request pricing may add up
  • —Anyone needing non-USDC or non-Base payment options

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/27/inventory \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/27/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, but there is no documentation, no OpenAPI schema, no request/response examples, and no description of what the inventory data actually contains. The listing is effectively a stub.

Warnings

  • —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content
  • —No OpenAPI or request/response schema provided; input parameters and output format are unknown
  • —The specific purpose and data returned by the /products/27/inventory endpoint is undocumented
  • —Cannot verify what 'Premium API Access' actually delivers beyond the endpoint being live

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 21:45:12Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/9UtHSh
x402-gated product inventory endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart