x402-gated product inventory endpoint on Base, pay-per-call with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 41) behind an x402 payment wall. It accepts HTTP POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals).
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 uniformly at $0.02 per call. This specific endpoint falls under a "Premium API Access" label, but the crawled material does not provide documentation on the request body schema, expected fields, or the structure of the inventory response. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no further detail.
Because no OpenAPI spec, request/response examples, or detailed documentation were found, the actual functionality behind this inventory endpoint is unclear. It is confirmed live (returns a valid x402 challenge with version 1), but consumers should expect to experiment or contact the provider for integration guidance.
Capabilities
Use cases
- —Querying inventory status for a specific product via a micropayment-gated API
- —Integrating pay-per-call product data into an agent workflow without API keys
- —Programmatic inventory checks settled in USDC on Base
Fit
Best for
- —Agents or bots that need on-demand inventory data without subscription commitments
- —Developers experimenting with x402 payment-gated APIs on Base
- —Use cases requiring keyless, per-request API access
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume inventory polling where per-request fees would accumulate quickly
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/products/41/inventory \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 challenge, but there is no OpenAPI spec, no request/response schema, and the docs pages are empty beyond a wallet-connect prompt. The actual purpose of the 'product inventory' resource is undocumented, making this effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — request body and response format are unknown.
- —Docs, pricing, and API pages render only 'Connect wallet' with no usable content.
- —The specific purpose and data returned by the /products/41/inventory endpoint is not documented anywhere in the crawl.
- —Listing title 'Premium API Access' is generic and does not describe actual functionality.
Citations
- —Endpoint returns HTTP 402 with x402 version 1 challenge, confirming it is live.https://lowpaymentfee.com/api/v1/products/41/inventory
- —Payment is in USDC on Base network, maxAmountRequired 20000 base units ($0.02).https://lowpaymentfee.com/api/v1/products/41/inventory
- —Site advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network.https://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/products/41/inventory