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 a specific NFT (ID 67) via a POST request. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories, all settled through the x402 protocol on the Base network using USDC.
The endpoint charges 0.02 USDC per request (maxAmountRequired of 20,000 base units with 6 decimals for USDC). Payment is made inline via the X-PAYMENT header — no API keys, accounts, or rate limits are required. The x402 challenge was confirmed live, returning a proper 402 Payment Required response with version 1 of the protocol. The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, and payments are directed to 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
Documentation is minimal — the site's landing page lists available endpoints and pricing but provides no request/response schemas, parameter descriptions, or example payloads for this specific NFT owner endpoint. The response MIME type is application/json, but the structure of the returned data is not documented.
Capabilities
Use cases
- —Looking up the current owner of a specific NFT
- —Verifying NFT ownership for gating or access control
- —Integrating NFT ownership checks into automated agent workflows
Fit
Best for
- —Agents needing quick NFT ownership lookups without API key registration
- —Developers prototyping NFT-aware applications with instant pay-per-call access
- —Workflows requiring on-demand NFT data with crypto-native payment
Not for
- —Bulk or batch NFT ownership queries across many token IDs (only one NFT ID is exposed at this endpoint)
- —Users who cannot pay with USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/67/owner \
-H "X-PAYMENT: <x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation on request parameters, response schema, or example payloads for this specific NFT owner endpoint, making it effectively a stub listing.
Warnings
- —No request or response schema documented — the structure of the returned JSON is unknown.
- —Only a single NFT ID (67) is exposed at this URL; it is unclear whether other NFT IDs are available at similar paths.
- —The landing page lists many API categories but provides no detailed docs for any of them.
- —No OpenAPI spec, README, or API reference was found during crawl.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base network.https://lowpaymentfee.com/api/v1/nfts/67/owner
- —The platform charges $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/nfts/67/owner