Query NFT ownership data via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns NFT owner information for a given NFT (token ID 100 in the probed URL pattern). It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all settled via the x402 protocol using USDC on the Base network. The endpoint accepts POST requests and returns JSON.
The x402 challenge confirms the endpoint is live and charges a maximum of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). No API keys or accounts are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The provider advertises no rate limits and instant access.
The broader lowpaymentfee.com platform hosts endpoints across several categories including data analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation), all priced at $0.02 per request. However, this specific listing covers only the NFT owner lookup endpoint. No OpenAPI schema, request/response examples, or detailed documentation were found in the crawl.
Capabilities
Use cases
- —Verify current ownership of a specific NFT programmatically
- —Build NFT portfolio dashboards that need owner data
- —Automate NFT ownership checks in trading bots or marketplace integrations
Fit
Best for
- —Agents or apps needing quick NFT owner lookups without API key signup
- —Micropayment-friendly workflows on Base network
- —Developers prototyping NFT tools who want instant, keyless access
Not for
- —Bulk enumeration of all NFT owners across large collections (no batch endpoint documented)
- —Users who need free or subscription-based pricing rather than per-call payments
- —Querying NFTs on networks other than Base (only Base settlement is advertised)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/100/owner \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and confirms pricing and settlement details, but there is no OpenAPI schema, no documented request/response format, no examples, and the crawled pages beyond the landing page returned only 'Connect wallet' with no useful content. The endpoint's actual behavior and response shape must be inferred entirely from the URL pattern and generic description.
Warnings
- —No OpenAPI or schema documentation available — request body and response format are unknown
- —No example responses found; actual data returned by the endpoint is unverified
- —The crawled /api, /pricing, and /README pages returned no meaningful content
- —It is unclear whether the NFT ID (100) is parameterized or if separate endpoints exist per token
Citations
- —The endpoint returns HTTP 402 with x402 version 1 challenge, confirming it is livehttps://lowpaymentfee.com/api/v1/nfts/100/owner
- —Maximum amount required is 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02https://lowpaymentfee.com/api/v1/nfts/100/owner
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com