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 ID 70. It is part of a broader suite of x402-protocol APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform share a uniform pricing model of $0.02 per request, settled in USDC on the Base network.
The specific endpoint `/api/v1/nfts/70/owner` accepts POST requests and is gated by the x402 payment protocol. When called without payment, it returns a 402 challenge specifying the accepted payment scheme (exact), the USDC asset contract on Base (0x8335…2913), and a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout window.
No OpenAPI schema, detailed request/response documentation, or usage examples are provided by the site beyond the 402 challenge and the landing page listing. The endpoint is live and responds correctly with the x402 challenge. However, the actual response payload structure (what fields are returned about the NFT owner) is not documented, so consumers should expect to discover the schema empirically after making a paid request.
Capabilities
Use cases
- —Checking the current owner of a specific NFT (ID 70) programmatically
- —Integrating NFT ownership verification into agent workflows that support x402 payments
- —Building dashboards or tools that display NFT provenance and current holder information
Fit
Best for
- —Agents or apps that need on-demand NFT ownership data with no API key setup
- —Developers experimenting with x402 micropayment-gated APIs on Base
- —Low-volume, pay-per-call NFT data queries without subscription commitments
Not for
- —Bulk or batch NFT ownership queries across many token IDs (only ID 70 is addressed by this endpoint)
- —Users who need free or API-key-based access without crypto wallet integration
- —Production systems requiring documented, stable response schemas
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/70/owner \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI schema, no documented request body format, no example response, and no description of what the NFT owner response actually contains. The listing is effectively a stub with pricing and liveness confirmed but little else.
Warnings
- —No response schema or example response documented — actual payload structure is unknown.
- —Endpoint is hardcoded to NFT ID 70; unclear if other NFT IDs are supported via similar paths.
- —No OpenAPI spec, no robots.txt, no agents.txt found on the provider site.
- —Landing page lists many API categories but the /api, /pricing, and /README pages all just show 'Connect wallet' with no useful content.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base network.https://lowpaymentfee.com/api/v1/nfts/70/owner
- —All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/nfts/70/owner