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 NFT #29. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled via the x402 protocol on the Base network using USDC.
The specific endpoint `/api/v1/nfts/29/owner` accepts POST requests and is gated by an x402 payment challenge. The maximum amount required per call is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds. No API keys or rate limits are advertised; access is instant once payment is included in the X-PAYMENT header.
The platform lists many other endpoints at the same $0.02 price point covering sentiment analysis, text summarization, embeddings, price feeds, gas estimates, geocoding, and more. However, this listing covers only the NFT owner lookup endpoint. Documentation beyond the landing page is sparse — the /api, /pricing, and /README pages all resolve to a minimal "Connect wallet" prompt with no further technical detail or response schema documentation.
Capabilities
Use cases
- —Look up the current owner of a specific NFT programmatically
- —Integrate NFT ownership checks into automated agent workflows
- —Verify NFT holder status before granting access or rewards
Fit
Best for
- —Agents needing on-demand NFT ownership data without API key management
- —Developers prototyping x402 payment flows on Base
- —Low-volume, pay-as-you-go NFT data queries
Not for
- —Bulk NFT collection scans (single-NFT endpoint, no batch support evident)
- —Users who need detailed NFT metadata beyond ownership
- —Anyone requiring free or subscription-based access
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/29/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. However, there is no OpenAPI schema, no response examples, no request body documentation, and the ancillary pages (/api, /pricing, /README) are empty beyond a wallet-connect prompt. The specific functionality (NFT #29 owner) is narrow and undocumented beyond the URL path and generic 'Premium API Access' description.
Warnings
- —No response schema or example response documented — actual output format is unknown.
- —No request body schema documented; unclear if POST body parameters are needed.
- —Endpoint is hardcoded to NFT #29; unclear if other NFT IDs are supported at different paths.
- —Documentation pages (/api, /pricing, /README) return only 'Connect wallet' with no useful content.
- —The platform appears to be a demonstration or early-stage service; reliability and uptime are unverified.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/29/owner
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/29/owner