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 #31. It is part of a broader suite of x402-protocol APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, 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/31/owner` accepts POST requests and is gated by the x402 payment protocol. When called without payment, it returns a 402 challenge specifying the USDC asset contract (0x8335…2913 on Base) and a maxAmountRequired of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). No API keys or rate limits are advertised; access is purely pay-per-call. The response MIME type is application/json.
Documentation is minimal — the provider's landing page lists available endpoints and pricing but does not provide request/response schemas, parameter descriptions, or usage examples for any individual endpoint. The NFT endpoint path suggests it returns owner address or ownership details for a specific NFT identified by ID 31, but the exact response structure is not documented.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Integrating NFT ownership checks into automated agent workflows
- —Verifying NFT ownership without managing API keys or subscriptions
Fit
Best for
- —Agents needing quick, keyless NFT ownership lookups
- —Developers prototyping x402 payment flows on Base
- —Low-volume, pay-as-you-go NFT data queries
Not for
- —Bulk or batch NFT ownership queries across many token IDs (only NFT #31 is exposed at this path)
- —Users who need detailed NFT metadata beyond ownership
- —Applications requiring sub-cent transaction costs (Base gas + $0.02 per call)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/31/owner \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI schema, no documented request parameters, no example responses, and no description of what the NFT ownership response actually contains. The listing is essentially a stub with confirmed liveness and pricing.
Warnings
- —No request or response schema documented — actual payload structure is unknown.
- —Only NFT #31 is addressable at this specific path; unclear if other NFT IDs are supported via parameterized routes.
- —Provider landing page offers many endpoint categories but crawled docs pages (/api, /pricing, /README) returned only 'Connect wallet' with no useful content.
- —The description 'Premium API Access' is generic and does not describe the endpoint's function.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base network.https://lowpaymentfee.com/api/v1/nfts/31/owner
- —All endpoints 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 asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/nfts/31/owner