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 #81 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 hosts a broader suite of APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request and settle on the Base network using USDC. This specific endpoint (/api/v1/nfts/81/owner) falls under the Web3/NFT category and returns JSON describing the current owner of the specified NFT.
Note that no OpenAPI schema, detailed documentation, or example responses were found in the crawl. The endpoint is confirmed live (returns a proper 402 challenge), but the exact response format and the NFT collection context are unknown. The provider's landing page confirms the pricing model and general architecture but does not document individual endpoint schemas.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Building NFT portfolio trackers that need ownership data
- —Agent-driven workflows that verify NFT ownership before executing actions
- —Integrating NFT ownership checks into Web3 dApps without managing API keys
Fit
Best for
- —Developers needing simple pay-per-call NFT ownership queries
- —AI agents that can settle x402 payments on Base
- —Projects that want keyless, rate-limit-free API access
Not for
- —Bulk enumeration of all NFT owners across 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/81/owner \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no example payloads, and the NFT collection context is unspecified. The listing is effectively a stub with verified liveness and pricing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —No example request or response bodies found in crawl
- —The specific NFT collection for ID 81 is not documented
- —Provider pages beyond the landing page returned only 'Connect wallet' with no useful content
Citations
- —The endpoint returns HTTP 402 with x402 challenge advertising 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/81/owner
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/81/owner
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The provider offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com