x402-gated NFT/premium API endpoint on Base, pay-per-call with USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall, settling payments in USDC on the Base network. The specific resource `/api/v1/nfts/81` appears to be part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request.
The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the "exact" scheme to the specified wallet address, with a maximum amount of 20,000 base units of USDC (0.02 USDC, i.e., $0.02). The asset contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` is the canonical USDC contract on Base. No API keys or rate limits are advertised — access is purely gated by per-request micropayment.
The specific functionality of the `/api/v1/nfts/81` endpoint is unclear from the available material. The landing page does not list an NFT-related API category, and the endpoint path suggests it may return data about a specific NFT (ID 81). No request/response schema or documentation beyond the x402 challenge is available, so the exact input parameters and output format remain unknown.
Capabilities
Use cases
- —Fetching NFT metadata or details via a single micropayment
- —Programmatic access to premium data without API key management
- —Agent-driven pay-as-you-go API consumption on Base
Fit
Best for
- —Developers wanting keyless, pay-per-call API access
- —AI agents that can settle x402 payments in USDC on Base
- —Users who need occasional NFT data without subscription commitments
Not for
- —High-volume consumers needing bulk/subscription pricing
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —Anyone requiring non-USDC or non-Base payment settlement
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/81 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the specific purpose of /api/v1/nfts/81 is not described anywhere on the site. This is effectively a stub listing.
Warnings
- —No documentation or OpenAPI schema available for this endpoint
- —The /api/v1/nfts/ path is not listed among the site's advertised API categories — its functionality is unknown
- —No example request or response data is available
- —The /pricing, /api, and /README pages returned only a 'Connect wallet' prompt with no useful content
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/nfts/81
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The site lists API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure — but no NFT categoryhttps://lowpaymentfee.com