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 #26. 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/26/owner` accepts POST requests and is gated by the x402 payment protocol. When called without payment, it returns a 402 challenge specifying the accepted payment scheme (exact), the USDC asset contract on Base (0x8335…2913), and a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout window. The response MIME type is application/json.
No OpenAPI schema, detailed documentation, or example responses were found beyond the landing page listing. The exact structure of the returned ownership data is unknown — it likely includes the owner address for the queried NFT, but this is inferred. The provider advertises no API keys, no rate limits, and instant access. Other endpoints on the same domain cover sentiment analysis, text summarization, embeddings, price feeds, gas estimates, geocoding, and more, all at the same $0.02 price point.
Capabilities
Use cases
- —Looking up the current owner of a specific NFT programmatically
- —Verifying NFT ownership as part of an automated workflow or bot
- —Integrating NFT ownership checks into a dApp without managing API keys
Fit
Best for
- —Agents or bots needing quick NFT ownership lookups with crypto micropayments
- —Developers who want keyless, pay-per-call NFT data access
- —x402-compatible clients on the Base network
Not for
- —Bulk querying ownership across many NFTs (no batch endpoint documented)
- —Users who need detailed NFT metadata beyond ownership
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/26/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 it is operational. However, there is no OpenAPI schema, no documented request/response format, no example payloads, and the NFT-specific endpoint is not even listed on the provider's landing page (only generic categories are shown). The actual data returned is entirely unknown.
Warnings
- —No documentation or schema available for this specific NFT ownership endpoint
- —The endpoint /api/v1/nfts/26/owner is not listed on the provider's landing page — it may be undocumented or experimental
- —Response structure is completely unknown; no example responses available
- —The provider site's /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/26/owner
- —All listed APIs on the platform cost $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/26/owner