x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/nfts/14` 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/14`), though the provider's landing page does not explicitly list this particular endpoint among its advertised APIs. 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 are required; callers authenticate purely through the x402 payment header. The provider advertises no rate limits and instant access.
The platform hosts a broad set of endpoints at similar price points ($0.02 each), including sentiment analysis, text summarization, embeddings, price feeds, gas estimates, geocoding, and more. However, no OpenAPI schema, detailed documentation, or example responses were found for any endpoint, including this one. The actual data returned by `/api/v1/nfts/14` is unknown — it could be metadata for a specific NFT, a collection summary, or something else entirely. Callers should be prepared for an undocumented JSON response.
Capabilities
Use cases
- —Fetching NFT data or metadata on demand with micropayments
- —Agent-driven NFT lookups without pre-provisioned API keys
- —Integrating NFT information into automated Web3 workflows
Fit
Best for
- —Agents needing keyless, pay-per-request NFT data access
- —Developers prototyping NFT integrations without subscription commitments
- —Low-volume or sporadic NFT data queries at $0.02 per call
Not for
- —High-volume NFT indexing where per-call costs add up quickly
- —Use cases requiring well-documented response schemas or SLAs
- —Users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/14 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no example responses, and the specific endpoint (/api/v1/nfts/14) is not even listed on the provider's landing page. The actual functionality is entirely inferred from the URL path.
Warnings
- —The /api/v1/nfts/14 endpoint is not listed among the provider's advertised APIs on the landing page
- —No documentation, OpenAPI spec, or example responses are available for this endpoint
- —The actual response schema and data content are completely unknown
- —The /pricing, /api, and /README pages returned no useful content (only '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/14
- —The platform advertises $0.02 per request, no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/nfts/14