x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/nfts/19` 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/19`), though the provider's landing page does not explicitly list this particular endpoint among its advertised routes. The endpoint is live and returns a valid x402 challenge.
Payment is settled on the Base network using USDC (contract `0x8335…2913`) via the "exact" scheme. The `maxAmountRequired` is 20,000 base units, which at 6 decimals equals $0.02 per request. No API keys or rate limits are advertised; access is granted purely through the x402 payment header. The response MIME type is `application/json` and the endpoint accepts HTTP POST.
The broader lowpaymentfee.com platform advertises a uniform $0.02/request pricing model across all its endpoints, with categories including sentiment analysis, text summarization, embeddings, price feeds, gas estimates, geocoding, and more. Documentation beyond the landing page is sparse — the `/api`, `/pricing`, and `/README` routes all return only a "Connect wallet" prompt with no further technical detail. No OpenAPI spec, request/response schemas, or usage examples are provided by the site.
Capabilities
Use cases
- —Fetching NFT metadata or details for a specific token ID 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 with 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, pay-as-you-go NFT data retrieval
Not for
- —High-volume NFT indexing where per-request costs add up quickly
- —Users who need detailed documentation or guaranteed SLAs
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/19 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The specific /nfts/19 endpoint is not even listed on the provider's landing page, making its actual functionality uncertain. This is effectively a stub listing.
Warnings
- —The /api/v1/nfts/19 endpoint is not listed among the provider's advertised APIs on the landing page — its purpose and response format are unknown.
- —No OpenAPI spec, request schema, or response schema is available from the provider.
- —All documentation pages (/api, /pricing, /README) return only a 'Connect wallet' prompt with no technical content.
- —The actual data returned by this endpoint is unverified; 'NFT data' is inferred solely from the URL path.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network.https://lowpaymentfee.com/api/v1/nfts/19
- —The platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/nfts/19