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 25) 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 $0.02 (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or subscriptions are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The provider hosts a broader suite of APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced uniformly at $0.02 per request. This particular endpoint focuses on NFT owner lookup. The response MIME type is application/json. The payment is routed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.
Documentation beyond the landing page is sparse — the /api, /pricing, and /README pages all resolve to a wallet-connect prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response format for a paid request is unknown.
Capabilities
Use cases
- —Look up the current owner of a specific NFT programmatically
- —Integrate NFT ownership checks into agent workflows without API key management
- —Pay-per-call NFT data retrieval settled on Base L2
Fit
Best for
- —Agents needing on-demand NFT ownership data without subscription overhead
- —Developers prototyping x402 payment flows with a low-cost endpoint
- —Automated workflows that need to verify NFT holders
Not for
- —Bulk or batch NFT ownership queries across many token IDs (only one ID exposed)
- —Users who need detailed NFT metadata, transfer history, or collection-level data
- —Applications requiring free or pre-paid API access
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/25/owner \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing, but there is no OpenAPI spec, no documented request/response schema, no example payloads, and the broader site docs are empty wallet-connect pages. The endpoint path is narrow (single NFT ID). Effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available — request body and response format are unknown.
- —Only NFT ID 25 is exposed at this specific URL; unclear if other IDs are supported via path parameter.
- —Provider docs pages (/api, /pricing, /README) return only a wallet-connect prompt with no content.
- —The description 'Premium API Access' is generic and does not describe the actual functionality.
Citations
- —Endpoint returns 402 with x402 challenge advertising USDC on Base, maxAmountRequired 20000https://lowpaymentfee.com/api/v1/nfts/25/owner
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/25/owner
- —All APIs priced at $0.02 per request with no API keys, no rate limitshttps://lowpaymentfee.com
- —Provider offers APIs across data analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com