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 #76 via a pay-per-call x402 protocol. The endpoint accepts POST requests and charges 20,000 base units of USDC (0x8335…2913) on the Base network, which equals $0.02 per request (USDC uses 6 decimals). No API keys or rate limits are required — payment is handled inline via the X-PAYMENT header using the x402 exact payment scheme.
The broader lowpaymentfee.com platform advertises a wide catalog of pay-per-call 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 priced at $0.02 per request on the Base network. This specific endpoint falls under the NFT/Web3 category, returning ownership information for a particular NFT.
Because there is no OpenAPI schema, no documented request/response body format, and no examples beyond the x402 challenge itself, the exact shape of the response is unknown. The endpoint is confirmed live (returns 402 with a valid x402 challenge). The payment is settled to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on Base.
Capabilities
Use cases
- —Querying the current owner of a specific NFT programmatically
- —Integrating NFT ownership checks into agent workflows without API key management
- —Building Web3 dashboards that verify NFT holders on demand
Fit
Best for
- —Agents or apps needing one-off NFT ownership lookups without subscription overhead
- —Developers who want keyless, pay-per-call access to NFT data
- —Workflows that already settle payments in USDC on Base
Not for
- —Bulk or high-volume NFT indexing (no batch endpoint documented)
- —Users who need ownership data for arbitrary NFT IDs (this endpoint is scoped to NFT #76)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/76/owner \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI schema, no request/response body documentation, no examples, and the endpoint is narrowly scoped to a single NFT ID. The purpose and response format must be inferred entirely from the URL path and generic description.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown.
- —Endpoint is hardcoded to NFT #76; no evidence of parameterized NFT ID support.
- —No crawled documentation beyond a landing page listing; /api, /pricing, and /README pages returned only 'Connect wallet' with no useful content.
- —The platform lists many API categories but it is unclear whether all endpoints are actually functional or placeholders.
Citations
- —The endpoint returns HTTP 402 with an x402 challenge advertising 20,000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/76/owner
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/76/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 networkhttps://lowpaymentfee.com
- —Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3https://lowpaymentfee.com/api/v1/nfts/76/owner