Pay-per-call API platform on Base (USDC) covering data, AI, finance, and utility endpoints.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/v1/transfers/160` is listed as "Premium API Access" and accepts POST requests with x402 payment of up to 0.02 USDC per call (20,000 base units with 6 decimals). No API keys or rate limits are advertised; access is gated entirely by the x402 payment protocol.
The wider platform advertises four endpoint categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request.
However, the specific functionality behind the `/api/v1/transfers/160` endpoint is unclear. The description is simply "Premium API Access" with no further documentation, input schema, or example responses available. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional technical content. Without documentation or response examples, it is difficult to determine what data or service this particular endpoint returns.
Capabilities
Use cases
- —Accessing paid API endpoints without traditional API key registration
- —Making micropayment-gated API calls settled on Base L2 in USDC
- —Agent-driven programmatic access to data, AI, or utility services via x402
Fit
Best for
- —Developers wanting keyless, pay-per-use API access
- —AI agents that can settle x402 payments on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed API documentation or response schemas before purchasing
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/160 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02 per call. However, there is no documentation, no input/output schema, no example responses, and the endpoint name 'Premium API Access' is entirely generic. The docs pages are empty beyond a wallet-connect prompt. The actual functionality of this specific endpoint is unknown.
Warnings
- —No documentation available — docs, pricing, and API pages only show 'Connect wallet'
- —The endpoint description 'Premium API Access' is generic and does not describe what the endpoint actually does
- —No input or output schema provided; callers cannot know what to send or what to expect back
- —The /api/v1/transfers/160 path suggests a transfer-related operation but this is speculative
Citations
- —The endpoint returns a 402 challenge requesting up to 20,000 base units of USDC (asset 0x8335…) on Base networkhttps://lowpaymentfee.com/api/v1/transfers/160
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com