Look up 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 (ID 78) via an x402-gated POST request. Payment is settled in USDC on the Base network. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02 per call. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The provider (lowpaymentfee.com) hosts a broader suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all priced at $0.02 per request. This particular endpoint sits under the NFT category and is discoverable via HTTP POST. The response MIME type is application/json. No OpenAPI schema or detailed documentation beyond the landing page was found, so the exact request body format and response fields are unknown.
The endpoint is live: the probe received a proper HTTP 402 with a well-formed x402 challenge. Payment is directed to wallet 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base. The timeout for payment settlement is 300 seconds.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Integrating NFT ownership checks into agent workflows without API key management
- —Building Web3 dashboards that verify NFT holders on demand
Fit
Best for
- —Agents needing quick NFT ownership lookups with crypto micropayments
- —Developers who want keyless, pay-per-call NFT data access
- —Workflows that already settle payments in USDC on Base
Not for
- —Bulk enumeration of all NFT owners across a collection (single-ID endpoint)
- —Users who need free or fiat-only payment options
- —Querying NFTs on networks other than what this provider supports
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/78/owner \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"Endpoint
Quality
The endpoint is live with a valid x402 402 challenge and clear pricing. However, there is no OpenAPI schema, no documented request/response format, and the crawled pages beyond the landing page were empty (wallet-connect gates). The specific NFT endpoint is not even listed on the provider's homepage, making its purpose and response shape entirely inferred.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —Request body format and response fields are unknown — no examples found
- —This specific NFT endpoint (/api/v1/nfts/78/owner) is not listed on the provider's landing page; only generic API categories are shown
- —Crawled /api, /pricing, and /README pages returned no useful content (wallet-connect gate)
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/78/owner
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/78/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
- —Payment timeout is 300 secondshttps://lowpaymentfee.com/api/v1/nfts/78/owner