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 #37. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled via the x402 protocol on the Base network using USDC.
The specific endpoint `/api/v1/nfts/37/owner` accepts POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 exact scheme. The maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call. There are no API keys, no rate limits, and no subscription commitments — each request is individually settled on-chain.
The platform advertises a uniform $0.02/request pricing model across all its endpoints. While this specific endpoint focuses on NFT owner lookups, the same provider hosts endpoints for sentiment analysis, text summarization, embeddings, price feeds, gas estimates, geocoding, and more. Documentation is minimal: there is no OpenAPI spec, no detailed request/response schema, and the crawled /api, /pricing, and /README pages only show a "Connect wallet" prompt with no further content.
Capabilities
Use cases
- —Looking up the current owner of a specific NFT programmatically
- —Integrating NFT ownership checks into automated agent workflows
- —Verifying NFT holder status without managing API keys or subscriptions
Fit
Best for
- —Agents needing quick, keyless NFT ownership queries
- —Developers prototyping NFT-aware applications with minimal setup
- —Micropayment-native workflows on Base
Not for
- —Bulk NFT collection scans (single-NFT endpoint, no batch support evident)
- —Users who need detailed NFT metadata beyond ownership
- —Applications requiring free or subscription-based access
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/37/owner \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema documentation, no example payloads, and the crawled docs pages are empty beyond a wallet-connect prompt. The endpoint's actual behavior (what it returns, what input it expects) must be entirely inferred from the URL path.
Warnings
- —No OpenAPI or schema documentation available — request body and response format are unknown.
- —The /api, /pricing, and /README pages returned no useful content beyond 'Connect wallet'.
- —This endpoint is hardcoded to NFT #37; it is unclear whether other NFT IDs are supported via different paths.
- —The platform appears to be a demonstration or early-stage service with many advertised endpoints but no substantive documentation.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 base units of USDC.https://lowpaymentfee.com/api/v1/nfts/37/owner
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/nfts/37/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 platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com