x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides premium API access to NFT data (specifically the resource at `/api/v1/nfts/100`). It is part of a broader suite of x402-protocol pay-per-call APIs hosted on the same domain, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform share the same pricing model: $0.02 per request, settled in USDC on the Base network.
The endpoint uses the x402 payment protocol (version 1) with the "exact" scheme. Callers send a POST request and must include an `X-PAYMENT` header containing a valid payment proof. The payment is made in USDC (contract `0x8335…2913` on Base) to address `0x1A2B…85F3`, with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The response MIME type is `application/json`. No API keys, rate limits, or upfront commitments are required — access is purely pay-per-request.
Documentation is minimal: the landing page lists available endpoints and pricing, but there is no OpenAPI spec, no request/response schema documentation, and no usage examples. The specific data returned by `/api/v1/nfts/100` (e.g., NFT metadata, ownership info, or collection details) is not documented. The endpoint is confirmed live via a valid 402 challenge response.
Capabilities
Use cases
- —Fetching NFT data or metadata on demand without managing API keys
- —Integrating NFT information into agent workflows with per-call USDC payments
- —Programmatic access to NFT resources for dashboards or analytics
Fit
Best for
- —Developers wanting zero-friction, keyless API access to NFT data
- —AI agents that can settle x402 micropayments on Base
- —Projects needing low-cost, pay-as-you-go NFT data lookups
Not for
- —Users who need detailed documentation or OpenAPI specs before integrating
- —High-volume consumers who need bulk/batch NFT data at discounted rates
- —Anyone unable to settle USDC payments on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/nfts/100 \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no usage examples, and no description of what data `/api/v1/nfts/100` actually returns. The listing is essentially a stub with verified liveness and pricing.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown
- —The specific data returned by /api/v1/nfts/100 is undocumented; 'Premium API Access' is the only description
- —No examples, guides, or README content found (pages behind wallet connect gate)
- —The broader platform lists many endpoints but none have detailed docs
Citations
- —The endpoint returns a 402 challenge with x402 version 1, exact scheme, USDC on Base, maxAmountRequired 20000https://lowpaymentfee.com/api/v1/nfts/100
- —All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/nfts/100