x402-gated product inventory endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 82) via the x402 payment protocol. It is gated behind a per-request USDC micropayment on the Base network. The x402 challenge confirms the endpoint is live and accepts POST requests, returning application/json responses.
The hosting site lowpaymentfee.com offers a broad catalog of x402-gated APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced at $0.02 per request. This specific endpoint (/api/v1/products/82/inventory) is listed as "Premium API Access" with a maximum payment of 20,000 base units of USDC (0.02 USDC, i.e., $0.02), consistent with the site's uniform pricing. Payment is settled on-chain on Base to the specified wallet address.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the inventory data actually contains or what parameters the POST body expects. The endpoint name suggests it returns inventory information for a specific product, but the actual payload structure is unknown. Agents should be prepared to experiment or contact the provider for integration details.
Capabilities
Use cases
- —Querying inventory levels for a specific product in an automated supply-chain workflow
- —Agent-driven commerce applications that need real-time stock data
- —Programmatic inventory checks without API key registration
Fit
Best for
- —Agents that can settle USDC payments on Base via x402
- —Quick, keyless access to product inventory data
- —Micropayment-friendly workflows needing per-call billing
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-volume bulk inventory queries where per-request pricing may add up
- —Applications requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/products/82/inventory \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no description of what the inventory data actually contains. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —No API documentation available — docs, pricing, and API pages only show 'Connect wallet'
- —No OpenAPI or JSON schema describing request parameters or response format
- —The purpose and content of 'product 82 inventory' is entirely unspecified
- —No request or response examples available anywhere in crawled material
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/products/82/inventory
- —The site advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/products/82/inventory