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 specific NFT (token ID 40) via a pay-per-call x402 protocol. The endpoint accepts POST requests and is settled in USDC on the Base network. Each call costs a maximum of 20,000 base units of USDC (6 decimals), which equals $0.02 USD. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The provider's landing page advertises a broad suite of APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced at $0.02 per request. This specific endpoint falls under the NFT/Web3 category. The response MIME type is application/json, though the exact response schema is not documented. The payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.
Documentation is minimal — the provider's site beyond the landing page requires a wallet connection to access, and no OpenAPI spec or detailed endpoint documentation was found. The exact request body format and response structure are unknown, so callers will need to experiment or contact the provider for details.
Capabilities
Use cases
- —Look up the current owner of a specific NFT by token ID
- —Verify NFT ownership as part of a gating or access-control workflow
- —Integrate NFT ownership data into dashboards or analytics pipelines
Fit
Best for
- —Agents needing on-demand NFT ownership checks without managing API keys
- —Developers building Web3 apps that need pay-per-call NFT data
- —Automated workflows that verify NFT holders before granting access
Not for
- —Bulk enumeration of all NFT owners across a collection (single-token endpoint)
- —Free or high-volume NFT indexing — each call costs $0.02
- —Non-crypto-native callers who cannot produce x402 payment proofs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/40/owner \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no documented request body schema, no example responses, and the provider's docs pages require wallet connection. The specific purpose (NFT owner lookup) is only inferable from the URL path.
Warnings
- —No OpenAPI or schema documentation available — request body format and response structure are unknown
- —Provider docs, pricing, and README pages all require wallet connection and returned no useful content
- —This endpoint is for a single NFT token ID (40); it is unclear if other token IDs are supported at different paths
- —The provider advertises many API categories but none appear individually documented
Citations
- —The endpoint returns HTTP 402 with an x402 challenge requiring USDC payment on Basehttps://lowpaymentfee.com/api/v1/nfts/40/owner
- —maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals) = $0.02https://lowpaymentfee.com/api/v1/nfts/40/owner
- —The provider advertises all APIs at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Payment is directed to 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/40/owner