x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/nfts/37` 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 (inferred from the URL path `/nfts/37`), 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 — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. 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. However, documentation is extremely thin: no OpenAPI spec, no request/response schema, and no usage examples are provided. The actual data returned by `/api/v1/nfts/37` is unknown — it could be metadata for NFT #37 in some collection, but this is speculative.
Capabilities
Use cases
- —Fetching NFT data or metadata on demand with per-request USDC micropayments
- —Agent-driven NFT lookups without needing pre-provisioned API keys
- —Integrating NFT information into automated Web3 workflows
Fit
Best for
- —Developers wanting keyless, pay-as-you-go NFT data access
- —AI agents that can settle x402 payments on Base
- —Prototyping NFT-related applications without subscription commitments
Not for
- —High-volume NFT indexing where per-request costs add up quickly
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone needing non-USDC or non-Base payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/37 \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"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, and no examples. The specific endpoint (/api/v1/nfts/37) is not even listed on the provider's landing page, making its actual functionality entirely opaque.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The /api/v1/nfts/37 path is not listed among the provider's advertised APIs — its actual functionality is unknown
- —No request body schema or response schema provided; callers cannot know what to send or what to expect
- —The /pricing, /api, and /README pages returned no useful content (just 'Connect wallet')
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/nfts/37
- —The platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimalshttps://lowpaymentfee.com/api/v1/nfts/37