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 #98 via a pay-per-call x402 protocol. The endpoint accepts POST requests and is settled in USDC on the Base network. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02 per request. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
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 on Base. This specific endpoint (`/api/v1/nfts/98/owner`) falls under the NFT/Web3 category and returns JSON describing the owner of the specified NFT. The response MIME type is application/json. The payment is routed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.
Note that the endpoint path is hardcoded to NFT ID 98; it is unclear from available documentation whether other NFT IDs are queryable via similar paths. No OpenAPI schema, detailed request/response documentation, or example payloads were found in the crawl. The site's non-API pages (pricing, README, /api) all resolve to a minimal "Connect wallet" page with no additional documentation.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Integrating NFT ownership checks into agent workflows without API key management
- —Verifying NFT ownership as part of a gating or access-control flow
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 #98 path documented)
- —Users who need detailed NFT metadata beyond owner address
- —Applications requiring free or subscription-based access
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/98/owner \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, and no documentation beyond a landing page listing. The endpoint path is hardcoded to a single NFT ID with no explanation of parameterization. Effectively a stub listing.
Warnings
- —No OpenAPI or detailed API documentation found; request and response schemas are unknown.
- —Only NFT #98 is referenced in the endpoint path; unclear if other IDs are supported.
- —Site pages (/pricing, /README, /api) return only a 'Connect wallet' prompt with no useful content.
- —No example responses available to verify what data is actually returned.
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.https://lowpaymentfee.com/api/v1/nfts/98/owner
- —The provider lists all APIs at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —Payment is routed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.https://lowpaymentfee.com/api/v1/nfts/98/owner