x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/nfts/73` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific resource appears to serve NFT-related data (resource ID 73), though the exact response payload is not documented beyond the generic "Premium API Access" label. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) via the x402 exact-payment scheme.
The x402 challenge is live and well-formed. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the site-wide flat pricing advertised on the landing page. No API keys or rate limits are required; callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The endpoint accepts POST requests.
Documentation is minimal. The landing page lists many endpoints across categories but provides no request/response schemas, example payloads, or detailed descriptions for any individual endpoint, including this one. The `/api`, `/pricing`, and `/README` pages all resolve to a bare "Connect wallet" prompt with no additional content. Without an OpenAPI spec or example responses, the exact data returned by `/api/v1/nfts/73` cannot be confirmed.
Capabilities
Use cases
- —Fetching NFT metadata or details for a specific token/collection
- —Integrating on-demand NFT data into agent workflows without API key management
- —Paying per-request for NFT information using USDC on Base
Fit
Best for
- —Agents that need keyless, pay-per-call access to NFT data
- —Developers experimenting with x402 protocol integrations
- —Low-volume consumers who prefer micropayments over subscriptions
Not for
- —High-volume NFT data consumers who need bulk/batch endpoints
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Anyone requiring non-USDC or non-Base payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/73 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base), but there is no OpenAPI spec, no request/response schema, no example payloads, and no documentation beyond a generic label. The actual data returned by this NFT endpoint is unknown.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —Response payload structure is entirely unknown — 'Premium API Access' is the only description
- —The /api, /pricing, and /README pages contain no useful content (just 'Connect wallet')
- —The specific NFT resource (ID 73) purpose is undocumented
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/73
- —Site-wide flat pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/73