Query NFT ownership data via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns NFT ownership information for NFT #72. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled via the x402 protocol on the Base network using USDC.
The specific endpoint `/api/v1/nfts/72/owner` accepts POST requests and is gated behind an x402 payment challenge. The maximum amount required per call is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). No API keys or rate limits are advertised; access is granted instantly upon payment. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.
The platform markets itself as a low-fee, no-commitment API marketplace. However, documentation is extremely sparse — there is no OpenAPI spec, no request/response schema beyond the x402 challenge's `outputSchema` stub, and the crawled pages beyond the landing page only show a "Connect wallet" prompt. The actual response format for this NFT owner lookup is unknown, so consumers should expect to discover the schema experimentally.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Verifying NFT ownership as part of a gating or access-control workflow
- —Building dashboards that display NFT holder information
Fit
Best for
- —Agents or apps that need on-demand NFT ownership data without managing API keys
- —Developers experimenting with x402 pay-per-call patterns on Base
- —Lightweight, low-cost one-off NFT ownership checks
Not for
- —Bulk or batch NFT ownership queries across large collections (no batch endpoint documented)
- —Use cases requiring detailed NFT metadata beyond ownership (traits, images, history)
- —Users who cannot settle payments in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/72/owner \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request body schema, no example responses, and no documentation beyond a landing page listing. The actual data returned is unknown, making this effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are undocumented.
- —The endpoint path suggests a hardcoded NFT ID (72); it is unclear whether other NFT IDs are supported or how to query them.
- —Crawled subpages (/api, /pricing, /README) returned only 'Connect wallet' with no useful content.
- —Response content type and structure must be discovered experimentally.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/72/owner
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/72/owner
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300 second timeouthttps://lowpaymentfee.com/api/v1/nfts/72/owner