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 #54. 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/54/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 (0.02 USD, since USDC uses 6 decimals). There are no API keys, no rate limits, and no upfront commitments — each call is individually paid at the time of request.
The platform advertises a uniform $0.02 per request pricing across all its endpoints. The x402 challenge confirms the endpoint is live, returning a proper 402 Payment Required response with a well-formed accepts array. No OpenAPI schema or detailed documentation was found beyond the landing page listing, so the exact request body format and response structure for this NFT owner lookup are not documented in the crawled material.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Building dashboards that display NFT ownership information
- —Verifying NFT ownership as part of an automated workflow
- —Agent-driven NFT portfolio tracking
Fit
Best for
- —Developers needing on-demand NFT ownership data without API key management
- —AI agents that can settle x402 payments autonomously on Base
- —Low-volume or sporadic queries where per-request pricing is more economical than subscriptions
Not for
- —High-volume bulk NFT indexing (no documented batch endpoint; per-request cost adds up)
- —Users who cannot settle USDC payments on the Base network
- —Querying NFTs beyond ID 54 (only this specific endpoint was probed; generalization is unconfirmed)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/54/owner \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI spec, no documented request/response schema, and no examples. The NFT owner endpoint's purpose is only inferable from the URL path. The broader platform landing page confirms pricing but provides no endpoint-specific documentation.
Warnings
- —No OpenAPI or detailed API documentation found for this endpoint.
- —Request body schema and response format are unknown — no examples available.
- —Only NFT #54 was probed; it is unclear whether other NFT IDs are supported at similar paths.
- —The /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network.https://lowpaymentfee.com/api/v1/nfts/54/owner
- —The platform charges $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is used for payment.https://lowpaymentfee.com/api/v1/nfts/54/owner