x402-gated product inventory endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 96) 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 priced at $0.02 per request and settled in USDC on the Base network.
The specific endpoint `/api/v1/products/96/inventory` is listed as "Premium API Access" and accepts POST requests. Payment is handled via the x402 protocol: callers receive a 402 challenge containing the payment parameters (asset, amount, payTo address) and must include a valid X-PAYMENT header to proceed. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. The payment is routed to address 0x1A2B…85F3 on Base mainnet using the "exact" scheme with a 300-second timeout.
Documentation on the site 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 usage examples available. The endpoint name "Premium API Access" and the path segment "products/96/inventory" suggest it returns inventory data for a specific product, but the exact request body format and response structure are unknown. The platform advertises no API keys, no rate limits, and instant access as features.
Capabilities
Use cases
- —Querying product inventory data with per-request USDC micropayments
- —Integrating keyless, pay-as-you-go inventory checks into automated agent workflows
- —Accessing product stock information without subscription commitments
Fit
Best for
- —Agents or bots that need on-demand inventory data without API key management
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume, pay-per-use inventory queries settled on Base
Not for
- —High-volume inventory monitoring requiring bulk pricing or rate guarantees
- —Users who need detailed API documentation or response schema before integrating
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/products/96/inventory
# Returns 402 with x402 challenge. Include X-PAYMENT header with valid payment proof to access.Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the endpoint's actual functionality ('Premium API Access' for product 96 inventory) is vaguely described. The listing is essentially a stub with confirmed liveness.
Warnings
- —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
- —No OpenAPI or JSON schema for request or response bodies
- —The specific functionality of 'products/96/inventory' is unclear beyond the path name
- —No examples of successful responses are available anywhere in the crawled material
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/products/96/inventory
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/products/96/inventory
- —The platform offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com