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 24. 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 endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers include an X-PAYMENT header with a signed payment of up to 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). No API keys or account registration are required — access is granted purely through per-call micropayment. The payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on Base, using the USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.
Documentation beyond the landing page is sparse. There is no OpenAPI spec, no detailed request/response schema, and the crawled /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no additional content. The exact request body format and response structure for this NFT owner endpoint are not documented in the available material.
Capabilities
Use cases
- —Querying the current owner of a specific NFT (ID 24) programmatically
- —Integrating NFT ownership checks into agent workflows without API key management
- —Building Web3 applications that verify NFT holders via micropaid API calls
Fit
Best for
- —Agents or apps needing on-demand NFT ownership data without subscription commitments
- —Developers who prefer pay-per-call crypto micropayments over traditional API keys
- —Low-volume or bursty NFT ownership queries where flat-rate plans are wasteful
Not for
- —High-volume bulk NFT indexing (no documented batch endpoint; per-call cost adds up)
- —Users without a Base-network USDC wallet or x402-compatible client
- —Querying arbitrary NFT IDs (this endpoint is scoped to NFT ID 24; other IDs may require different paths)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/24/owner \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment-header>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no documented request/response schema, no examples, and the crawled docs pages are empty. The specific functionality (NFT 24 owner) is narrow and undocumented beyond the URL path.
Warnings
- —No OpenAPI or schema documentation available — request body format and response structure are unknown.
- —Crawled /api, /pricing, and /README pages returned no useful content (only 'Connect wallet').
- —Endpoint is scoped to a single NFT ID (24); it is unclear how to query other NFT IDs.
- —The provider landing page lists many API categories but none specifically mention NFT endpoints, suggesting this may be a demo or test endpoint.
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/nfts/24/owner
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limitshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/24/owner
- —Payment recipient is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3https://lowpaymentfee.com/api/v1/nfts/24/owner