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 ID 6. It is part of a broader suite of x402-protocol APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints on the platform share a uniform pricing model of $0.02 per request, settled in USDC on the Base network.
The specific endpoint `/api/v1/nfts/6/owner` accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The x402 challenge confirms the endpoint is live, advertising a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. No API keys or rate limits are advertised; access is gated purely by per-request micropayment.
Documentation is minimal. The provider's landing page lists available API categories and pricing but does not provide request/response schemas, parameter descriptions, or usage examples for any endpoint. The NFT-related endpoints are not even listed on the homepage, so the exact response format and any required POST body fields are unknown. Callers should expect a JSON response containing owner address information, but the precise structure must be discovered empirically.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Building NFT portfolio dashboards that need on-demand ownership verification
- —Agent-driven workflows that verify NFT ownership before executing downstream logic
Fit
Best for
- —Developers needing simple, keyless NFT ownership queries
- —AI agents that can settle x402 micropayments on Base
- —Low-volume or sporadic lookups where per-call pricing beats subscriptions
Not for
- —Bulk enumeration of all NFT owners across a collection (no batch endpoint documented)
- —Users who cannot settle USDC payments on the Base network
- —Applications requiring detailed NFT metadata beyond ownership
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/6/owner \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documented request/response format, no examples, and this specific NFT endpoint is not even listed on the provider's homepage. The listing is essentially a stub with confirmed liveness.
Warnings
- —No request or response schema is documented for this endpoint.
- —The /api/v1/nfts/6/owner path is not listed among the provider's advertised APIs on the homepage, raising questions about its intended audience or stability.
- —No documentation pages could be crawled beyond the landing page (other pages only showed 'Connect wallet').
- —The exact POST body parameters (if any) are unknown and must be discovered by trial.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network.https://lowpaymentfee.com/api/v1/nfts/6/owner
- —All listed APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC uses 6 decimals, so 20000 base units equals $0.02.https://lowpaymentfee.com