x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/nfts/54` 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/54`), 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 no minimums or commitments. However, documentation is extremely thin — there is no OpenAPI spec, no request/response schema documentation, and the `/api`, `/pricing`, and `/README` pages all resolve to a minimal "Connect wallet" prompt. The exact request body format and response structure for this NFT endpoint are unknown.
Capabilities
Use cases
- —Fetching NFT metadata or details on a per-request payment basis
- —Integrating NFT data into agent workflows without API key management
- —Programmatic access to NFT information settled via on-chain USDC micropayments
Fit
Best for
- —Agents or bots that need keyless, pay-as-you-go NFT data access
- —Developers experimenting with x402 protocol integrations
- —Low-volume NFT data lookups where subscription APIs are overkill
Not for
- —High-volume NFT indexing (no documented bulk endpoints or rate advantages)
- —Users who need detailed API documentation or guaranteed SLAs
- —Non-crypto-native consumers who cannot settle USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/54 \
-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 OpenAPI spec, no documented request/response schema, and the specific /nfts/54 endpoint is not even listed on the provider's landing page. Without knowing what data this returns or what request body it expects, this is effectively a stub listing.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The /api/v1/nfts/54 path is not listed among the provider's advertised endpoints — its purpose is inferred from the URL only
- —Request body format and response structure are completely unknown
- —The /pricing, /README, and /api pages all resolve to a minimal 'Connect wallet' prompt with no useful content
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/54
- —The platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/nfts/54