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 #56. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind the x402 payment protocol on the Base network using USDC.
The specific endpoint `/api/v1/nfts/56/owner` accepts POST requests and returns JSON. Payment is settled on-chain via USDC on Base (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum cost of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The x402 challenge confirms the endpoint is live and discoverable. No API keys are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The platform advertises a uniform $0.02-per-request pricing model across all its endpoints, with no rate limits, no minimums, and no commitments. Documentation beyond the landing page is sparse — the /api, /pricing, and /README pages all resolve to a minimal "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available, so the exact request body format and response structure for this NFT owner lookup must be discovered experimentally.
Capabilities
Use cases
- —Look up the current owner of a specific NFT (token #56) programmatically
- —Integrate NFT ownership checks into automated workflows or agents
- —Demonstrate x402 micropayment protocol usage on Base network
Fit
Best for
- —Agents needing on-demand NFT ownership data without API key management
- —Developers experimenting with x402 pay-per-call protocols
- —Low-volume, ad-hoc NFT owner queries where $0.02/call is acceptable
Not for
- —Bulk or batch NFT ownership queries across many token IDs (only token #56 is exposed at this path)
- —Users who need detailed NFT metadata, transaction history, or collection-level data
- —Applications requiring documented request/response schemas and SLA guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/56/owner \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI spec, no documented request/response schema, no examples, and the broader site pages are empty beyond a wallet-connect prompt. The specific functionality (NFT #56 owner) is narrow and undocumented.
Warnings
- —No OpenAPI or schema documentation available — request body format and response structure are unknown
- —Site pages (/api, /pricing, /README) return only a 'Connect wallet' prompt with no useful content
- —This endpoint is scoped to a single NFT (token #56); it is unclear if other token IDs are supported at different paths
- —No examples or integration guides are provided by the platform
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/56/owner
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/56/owner
- —Platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com