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 #28. It is part of a broader platform offering pay-per-request 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/28/owner` accepts POST requests and is gated by an x402 payment challenge. The price is 20,000 base units of USDC (which uses 6 decimals), equating to $0.02 per request. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC at contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base. No API keys or rate limits are advertised; access is instant once payment is included in the `X-PAYMENT` header.
Documentation is minimal — the site lists many endpoints but provides no request/response schemas, parameter descriptions, or usage examples beyond the endpoint URLs and pricing. The NFT endpoint path suggests it returns the current owner of a specific NFT (ID 28), but the exact response format is not documented. The platform appears to be a demonstration or early-stage service showcasing low-fee x402 micropayments.
Capabilities
Use cases
- —Looking up the current owner of a specific NFT programmatically
- —Integrating NFT ownership checks into agent workflows without API key management
- —Demonstrating x402 micropayment protocol usage on Base
Fit
Best for
- —Agents needing on-demand NFT ownership data without subscription commitments
- —Developers experimenting with x402 payment-gated APIs
- —Low-volume NFT ownership queries at $0.02 per call
Not for
- —Bulk or high-volume NFT ownership lookups across many token IDs
- —Querying NFTs on chains other than what this endpoint covers
- —Applications requiring detailed NFT metadata beyond ownership
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/28/owner \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation of request parameters, response schema, or examples. The NFT endpoint path is specific (NFT #28) with no indication of how to query other NFTs. Effectively a stub listing.
Warnings
- —No request or response schema documented — response format is unknown
- —Endpoint path is hardcoded to NFT ID 28; unclear if other NFT IDs are queryable
- —No OpenAPI spec, README, or detailed docs available on the site
- —Platform appears to be early-stage or a demo; many listed endpoints may not be fully functional
Citations
- —The endpoint returns HTTP 402 with an x402 challenge requiring USDC payment on Basehttps://lowpaymentfee.com/api/v1/nfts/28/owner
- —Price is $0.02 per request across all listed endpointshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/28/owner
- —No API keys, no rate limits, instant access advertisedhttps://lowpaymentfee.com