Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The site advertises a broad suite of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities, all priced at $0.02 per request and settled in USDC on the Base network. The specific resource `/api/resource/14` is one of these endpoints, though the site does not document what resource ID 14 maps to.
The x402 challenge confirms the endpoint is live and accepts payment via the "exact" scheme on Base, requiring up to 20,000 base units of USDC (0x8335…2913), which equals $0.02 given USDC's 6 decimals. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised — access is gated purely by per-request micropayment.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what data or functionality `/api/resource/14` actually returns. The site lists many endpoint paths (analytics, AI, finance, utils) but none match the `/api/resource/14` pattern, making it unclear whether this is a generic resource endpoint or something distinct.
Capabilities
Use cases
- —Programmatic access to a paid API resource without needing API keys or subscriptions
- —Agent-driven workflows that pay per call using USDC on Base
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers exploring x402 micropayment-gated APIs
- —AI agents with Base USDC wallets needing on-demand API calls
- —Projects wanting zero-commitment, pay-as-you-go API access
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume use cases where $0.02/request adds up without bulk discounts
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/resource/14 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what /api/resource/14 actually returns. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —The specific resource /api/resource/14 is not listed among the site's advertised endpoints, so its purpose is unknown
- —No OpenAPI schema or request/response examples are provided
- —No information on what data or functionality this endpoint returns
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/resource/14
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/resource/14
- —Docs, API, pricing, and README pages render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs