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 #86. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all settled via the x402 protocol using USDC on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The provider's landing page advertises several API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. This specific endpoint (/api/v1/nfts/86/owner) is not listed on the homepage but follows the same pricing and payment scheme. The endpoint accepts POST requests and returns application/json. The exact response schema is not documented, but based on the path it likely returns the current owner address of the specified NFT.
The x402 challenge was successfully captured, confirming the endpoint is live. Payment is made in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base mainnet, sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. The maximum timeout for payment settlement is 300 seconds. No OpenAPI spec, detailed documentation, or example responses were found in the crawl.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Building NFT portfolio dashboards that need on-demand ownership checks
- —Agent workflows that verify NFT ownership before executing downstream logic
Fit
Best for
- —Developers needing quick, keyless NFT ownership lookups
- —AI agents that can settle x402 payments autonomously on Base
- —Low-volume or sporadic queries where per-call pricing beats subscriptions
Not for
- —Bulk enumeration of all NFT owners in a collection (single-NFT endpoint)
- —Users who cannot settle USDC payments on the Base network
- —Applications requiring detailed NFT metadata beyond ownership
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/86/owner \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no documented request/response schema, no example payloads, and the specific NFT endpoint is not even listed on the provider's own homepage. Effectively a stub with confirmed liveness.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —This specific NFT endpoint (/api/v1/nfts/86/owner) is not listed on the provider's homepage — may be experimental or undocumented
- —No example request or response bodies could be found
- —Response format and fields are entirely unknown beyond the MIME type application/json
Citations
- —The endpoint returns HTTP 402 with an x402 challenge advertising USDC payment on Basehttps://lowpaymentfee.com/api/v1/nfts/86/owner
- —All APIs on the platform cost $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/nfts/86/owner
- —Payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3https://lowpaymentfee.com/api/v1/nfts/86/owner