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 #32 via a pay-per-call x402 protocol. The endpoint accepts POST requests and is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). Each call costs a maximum of $0.02 (20,000 base units with 6 decimals). No API keys or rate limits are required — payment is handled inline via the X-PAYMENT header.
The provider (lowpaymentfee.com) hosts a broader suite of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced at $0.02 per request. This specific endpoint focuses on NFT owner lookup. The response MIME type is application/json. The x402 challenge is live and returns a well-formed 402 response with version 1 of the protocol.
Documentation is minimal — the site's /api, /pricing, and /README pages all resolve to a wallet-connect prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema beyond the output schema stub in the 402 challenge, and no example payloads. The actual data returned by the endpoint (NFT owner address, metadata, etc.) is not documented.
Capabilities
Use cases
- —Looking up the current owner of a specific NFT programmatically
- —Verifying NFT ownership as part of a gating or access-control workflow
- —Integrating NFT ownership checks into an agent pipeline with automatic micropayments
Fit
Best for
- —Agents or bots that need on-demand NFT ownership data without managing API keys
- —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 #32 path is documented)
- —Users who need detailed NFT metadata, transaction history, or collection-level analytics
- —Anyone without a Base-compatible USDC wallet for payment
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/32/owner \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint exists and accepts payment on Base in USDC at $0.02. However, there is no OpenAPI spec, no documented request body schema, no example responses, and the site's documentation pages are empty wallet-connect prompts. The actual data returned is unknown.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are undocumented.
- —The endpoint path is hardcoded to NFT #32; it is unclear whether other NFT IDs are supported or how to parameterize.
- —Site documentation pages (/api, /pricing, /README) return only a wallet-connect prompt with no useful content.
- —The provider lists many other API endpoints on the landing page but none have detailed docs; the platform may be experimental or early-stage.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 base units.https://lowpaymentfee.com/api/v1/nfts/32/owner
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/nfts/32/owner
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The provider offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories.https://lowpaymentfee.com