Query NFT ownership data via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com returns the owner of NFT #85 via a pay-per-call x402 protocol. The payment is settled on the Base network using USDC (contract 0x8335…2913). Each request costs 20,000 base units of USDC, which at 6 decimals equals $0.02. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all priced at $0.02 per request. This specific route (`/api/v1/nfts/85/owner`) is an NFT ownership lookup. The POST method is used, and the response MIME type is application/json.
Documentation beyond the landing page is sparse — the /api, /pricing, and /README pages all resolve to a wallet-connect stub with no additional detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response structure after successful payment is unknown.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Integrating NFT ownership checks into agent workflows without API key management
- —Building dashboards or bots that verify NFT holders via micropayment-gated calls
Fit
Best for
- —Agents needing quick, keyless NFT ownership lookups
- —Developers prototyping x402 payment flows on Base
- —Low-volume, pay-as-you-go NFT data queries
Not for
- —Bulk or batch NFT ownership queries across many token IDs (only NFT #85 is exposed at this path)
- —Users who need detailed NFT metadata beyond ownership
- —Applications requiring free or subscription-based access
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/85/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 ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no example payloads, and the documentation pages are empty wallet-connect stubs. The actual behavior after payment is entirely unknown.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —Documentation pages (/api, /pricing, /README) return only a wallet-connect stub with no content
- —This path is hardcoded to NFT #85; it is unclear whether other NFT IDs are queryable via similar routes
- —The platform description ('Premium API Access') is generic and does not describe this specific endpoint's functionality
Citations
- —The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base network at 20,000 base units ($0.02)https://lowpaymentfee.com/api/v1/nfts/85/owner
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/85/owner