x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/nfts/57` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific resource appears to serve NFT-related data (inferred from the URL path `/nfts/57`), though the provider's landing page does not explicitly list this particular endpoint or document its request/response schema. The endpoint is live and returns a valid x402 challenge.
Pricing is $0.02 per request, paid in USDC on the Base network. The x402 challenge specifies a `maxAmountRequired` of 20,000 base units of USDC (contract `0x8335…2913`, 6 decimals), which equals $0.02. Payment is made via the x402 `exact` scheme with no API keys, subscriptions, or rate limits required — callers simply attach an `X-PAYMENT` header with a valid payment proof. The timeout window is 300 seconds.
The broader lowpaymentfee.com platform advertises additional endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more, all at the same $0.02/request price point. However, no OpenAPI spec, detailed request/response documentation, or usage examples were found for any of these endpoints, including `/api/v1/nfts/57`. The actual data returned by this NFT endpoint is unknown.
Capabilities
Use cases
- —Fetching NFT metadata or details for token ID 57 via a single paid request
- —Integrating pay-per-call NFT data into an agent workflow without managing API keys
- —Programmatic access to NFT information settled on Base L2 in USDC
Fit
Best for
- —Agents or bots that need on-demand NFT data without subscription overhead
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume or sporadic NFT data lookups at $0.02 per call
Not for
- —High-volume NFT data needs where per-call pricing would be expensive
- —Users who need comprehensive NFT collection analytics or batch queries
- —Anyone requiring detailed API documentation before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/57 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of /api/v1/nfts/57 is not described anywhere on the provider's site. The NFT endpoint is not even listed among the advertised APIs. This is effectively a stub listing.
Warnings
- —No documentation or schema found for /api/v1/nfts/57 — endpoint purpose and response format are unknown
- —This specific NFT endpoint is not listed on the provider's landing page among advertised APIs
- —No OpenAPI spec, README, or detailed docs were accessible (pricing and README pages only show 'Connect wallet')
- —Actual data quality and reliability cannot be assessed without response examples
Citations
- —The x402 challenge specifies maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network with 300s timeouthttps://lowpaymentfee.com/api/v1/nfts/57
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The landing page lists endpoints for analytics, AI/ML, finance/Web3, and infrastructure but does not list /api/v1/nfts/57https://lowpaymentfee.com