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 #33. 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/33/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). There are no API keys, rate limits, or subscription commitments — each call is paid individually via the X-PAYMENT header.
Documentation is minimal. The provider's landing page lists available API categories and confirms the $0.02/request pricing, but there is no OpenAPI spec, no detailed request/response schema, and no usage examples beyond the endpoint URLs. The NFT-specific endpoint is not explicitly listed on the homepage, so its exact response format is inferred from the description field ("Premium API Access") and the mimeType (application/json). Treat the response structure as uncertain until verified with an actual paid call.
Capabilities
Use cases
- —Checking the current owner of a specific NFT programmatically
- —Integrating NFT ownership verification into agent workflows
- —Building dashboards that display NFT holder information
Fit
Best for
- —Agents needing on-demand NFT ownership data without API key management
- —Developers experimenting with x402 micropayment-gated APIs
- —Low-volume, pay-as-you-go NFT data lookups
Not for
- —Bulk or batch NFT ownership queries across many token IDs
- —Users who need detailed NFT metadata (traits, images, history) beyond ownership
- —Applications requiring sub-cent transaction costs (the $0.02 floor applies per call)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/33/owner \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and network. However, there is no OpenAPI spec, no documented request/response schema, no examples, and the specific NFT endpoint isn't even listed on the provider's homepage. The actual data returned is unknown without a paid call.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The /api/v1/nfts/33/owner path is not listed on the provider's homepage — it may be undocumented or experimental
- —Response format is entirely unknown; the only confirmed mimeType is application/json
- —No robots.txt or agents.txt present on the origin
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/33/owner
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/33/owner