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 5) via a pay-per-call x402 protocol. The endpoint accepts POST requests and is settled on the Base network using USDC (USD Coin). Each call costs a maximum of $0.02 (20,000 base units of USDC with 6 decimals), with no API keys, rate limits, or subscriptions required.
The provider hosts a broader suite of x402-gated APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance and Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02-per-request pricing model and are accessible on the Base network without authentication beyond the x402 payment header.
The specific endpoint `/api/v1/nfts/5/owner` is focused on returning the owner of NFT #5. No OpenAPI schema, request body documentation, or response examples are provided by the site, so the exact request and response formats are unknown. The endpoint is live and returns a valid x402 challenge with a 402 status code.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Integrating NFT ownership checks into agent workflows without API key management
- —Paying per-call for NFT data without subscriptions or rate limits
Fit
Best for
- —Agents needing on-demand NFT ownership data with no signup
- —Developers prototyping x402 micropayment integrations
- —Low-volume NFT data lookups where pay-per-call is cost-effective
Not for
- —Bulk or batch NFT ownership queries across many token IDs
- —Applications requiring detailed NFT metadata beyond ownership
- —Users who need free or subscription-based access
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/5/owner \
-H "X-PAYMENT: <x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no documented request/response format, and no examples. The endpoint path suggests NFT ownership lookup but the actual behavior is unverified. The site's other pages (api, pricing, README) returned only 'Connect wallet' with no useful content.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —No request body or response format documented — actual behavior is unknown
- —The endpoint is specific to NFT ID 5; it is unclear whether other NFT IDs are supported at different paths
- —Site documentation pages (/api, /pricing, /README) returned no useful content
Citations
- —Endpoint returns 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/nfts/5/owner
- —maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02https://lowpaymentfee.com/api/v1/nfts/5/owner
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com