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 #93 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, rate limits, or subscriptions 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 (sentiment, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request and settle on the Base network using USDC.
This specific endpoint (/api/v1/nfts/93/owner) appears to be an NFT ownership lookup. No OpenAPI schema, request body documentation, or example responses were found in the crawl material, so the exact request format and response structure are unknown. The endpoint is confirmed live via a 402 challenge response.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Building NFT portfolio dashboards that need ownership verification
- —Agent-driven workflows that check NFT provenance before executing trades
Fit
Best for
- —Developers needing simple pay-per-call NFT ownership data without API key management
- —AI agents that can settle x402 payments on Base
- —Low-volume or sporadic NFT ownership queries where subscription pricing is wasteful
Not for
- —Bulk NFT ownership scans across large collections (no batch endpoint documented)
- —Users who need free or testnet access before committing to paid calls
- —Querying NFTs beyond the hardcoded ID 93 (no evidence of parameterized NFT ID support)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/93/owner \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, but there is no OpenAPI schema, no documented request/response format, and no example payloads. The NFT-specific endpoint path is hardcoded to ID 93 with no documentation on parameterization. The crawl pages beyond the homepage returned only 'Connect wallet' with no useful content.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —No example request or response bodies found — request format is unknown
- —Endpoint path is hardcoded to NFT ID 93; unclear if other NFT IDs are supported
- —The broader API suite (AI, finance, analytics) listed on the homepage could not be verified individually
- —Crawl of /api, /pricing, and /README pages returned no useful content (only 'Connect wallet')
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/93/owner
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/93/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