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 a specific NFT (ID 95) via a paid API call settled through the x402 protocol on the Base network. The payment is made in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all priced at $0.02 per request. This particular route serves NFT owner lookup. The endpoint accepts POST requests and returns application/json responses. No OpenAPI schema or detailed documentation for the response body was found, so the exact shape of the returned owner data is unknown.
The x402 challenge was successfully captured (HTTP 402 with valid accepts array), confirming the endpoint is live. The payment is settled on the Base L2 network using the "exact" scheme, meaning the caller pays the full maxAmountRequired upfront. Timeout for payment settlement is 300 seconds.
Capabilities
Use cases
- —Look up the current owner of a specific NFT programmatically
- —Verify NFT ownership as part of an automated workflow or agent pipeline
- —Integrate NFT ownership checks into a dApp without managing API keys
Fit
Best for
- —Agents or scripts that need on-demand NFT ownership data without subscription overhead
- —Developers who prefer crypto-native pay-per-call APIs over traditional API key models
- —Low-volume or sporadic NFT ownership queries where $0.02/call is cost-effective
Not for
- —Bulk or high-frequency NFT indexing (dedicated indexers like Alchemy or Moralis would be cheaper at scale)
- —Querying arbitrary NFT IDs — this endpoint is scoped to NFT ID 95 specifically
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/95/owner \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and pricing is clear, but there is no OpenAPI schema, no response body documentation, no example requests or responses, and the endpoint is narrowly scoped to a single NFT ID (95) with no explanation of what it returns. The broader site lists many endpoints but provides no detailed docs for any of them.
Warnings
- —No OpenAPI or response schema available — the structure of the returned data is unknown.
- —Endpoint is hardcoded to NFT ID 95; it is unclear whether other NFT IDs are queryable at different paths.
- —No documentation pages rendered useful content (pricing, README, and /api pages only showed 'Connect wallet').
- —The platform lists many API categories (AI, analytics, finance, etc.) but none have visible documentation — treat all with caution.
Citations
- —The endpoint returns HTTP 402 with x402 challenge advertising USDC payment on Base network at 20,000 base units (~$0.02).https://lowpaymentfee.com/api/v1/nfts/95/owner
- —The USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/nfts/95/owner
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The site lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories.https://lowpaymentfee.com