x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.
What it does
This endpoint at `/api/v1/nfts/49` 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 `/api/v1/nfts/49` path is labeled "Premium API Access" but its exact functionality is not documented beyond that label — it may return NFT-related data for token ID 49, but this is inferred from the URL pattern rather than confirmed by documentation.
The endpoint is live and responds with a standard x402 payment challenge. It accepts USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on the Base network using the "exact" payment scheme. The maximum amount required is 20,000 base units of USDC, which at 6 decimals equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing across all listed endpoints. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.
The platform advertises no API keys, no rate limits, and instant access. There is no OpenAPI schema, no detailed documentation for individual endpoints, and no example request/response payloads available from the crawled pages. The `/api`, `/pricing`, and `/README` pages all returned only a "Connect wallet" prompt with no additional content. Because the actual response payload and input parameters for this specific endpoint are undocumented, agents should treat this as a minimally documented endpoint.
Capabilities
Use cases
- —Fetching NFT metadata or data for token ID 49 via a single paid request
- —Integrating pay-per-call NFT data into agent workflows without API key management
- —Testing x402 protocol payment flows against a low-cost live endpoint
Fit
Best for
- —Agents needing on-demand NFT data without subscription commitments
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume, pay-as-you-go API consumers on Base network
Not for
- —High-volume NFT data needs where bulk pricing would be more economical
- —Users who need detailed API documentation or guaranteed response schemas before integrating
- —Non-crypto users who cannot pay with USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/49 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation for the /api/v1/nfts/49 path — no input schema, no response examples, and no description beyond the generic 'Premium API Access' label. The crawled pages provide no additional detail. This is effectively a stub listing.
Warnings
- —No documentation exists for the /api/v1/nfts/49 endpoint — its actual functionality is unknown
- —No OpenAPI schema, input parameters, or response format documented
- —All secondary pages (/api, /pricing, /README) returned only 'Connect wallet' with no content
- —The endpoint label 'Premium API Access' is generic and does not describe what data is returned
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/nfts/49
- —USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/49
- —Platform-wide pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com