x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/nfts/30` is part of the lowpaymentfee.com platform, which offers a broad suite of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific endpoint appears to serve NFT-related data (resource path suggests NFT ID 30), though the exact response payload is not documented beyond the generic "Premium API Access" label.
The endpoint is live and returns a valid x402 challenge. It accepts POST requests and settles payments on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required is 20,000 base units of USDC, which at 6 decimals equals $0.02 per request. The platform advertises no API keys, no rate limits, and instant access — payment is the only authentication mechanism.
Documentation is minimal. The site's landing page lists many endpoints at a uniform $0.02 price point but provides no request/response schemas, parameter descriptions, or example payloads for any of them. The `/api`, `/pricing`, and `/README` pages all resolve to a bare "Connect wallet" prompt with no additional content. Without an OpenAPI spec or detailed docs, the exact input parameters and response structure for this NFT endpoint remain unknown.
Capabilities
Use cases
- —Fetching on-chain or off-chain NFT metadata by ID
- —Integrating NFT data into agent workflows without managing API keys
- —Programmatic NFT lookups with micropayment settlement on Base
Fit
Best for
- —Agents or bots that need keyless, pay-per-call NFT data access
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume NFT data consumers who prefer usage-based pricing
Not for
- —High-volume NFT analytics requiring bulk/batch endpoints
- —Users who need detailed API documentation and guaranteed SLAs
- —Anyone needing non-USDC or non-Base payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/30 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI spec, no request/response schema, no documentation beyond a generic label, and no example payloads. The actual functionality behind 'Premium API Access' for /api/v1/nfts/30 is entirely opaque.
Warnings
- —No API documentation, OpenAPI spec, or response schema available
- —Exact request parameters and response structure are unknown
- —The site's /api, /pricing, and /README pages contain no useful content beyond 'Connect wallet'
- —The platform lists many endpoints but none appear individually documented
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/30
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/nfts/30
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant accesshttps://lowpaymentfee.com
- —The site lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com