Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad set of endpoints across data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, rate limits, or subscriptions are required — callers simply attach an x402 payment header to each request.
The specific endpoint at `/api/v1/transfers/172` is listed as "Premium API Access" and advertises a maximum payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The x402 challenge confirms the endpoint is live, accepts POST requests, and returns application/json. However, there is no documentation describing what this particular transfers endpoint does — the site's landing page lists categories like analytics, AI, finance, and utilities, but `/api/v1/transfers/172` does not appear among them.
The platform's crawled docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no further content, so detailed request/response schemas, parameter descriptions, and example payloads are unavailable. The endpoint is confirmed live via its 402 challenge, but its actual functionality remains unclear.
Capabilities
Use cases
- —Programmatic access to paid API services without subscription or API key management
- —Agent-driven workflows that need on-demand API calls settled in USDC on Base
- —Integrating pay-per-use data or utility endpoints into automated pipelines
Fit
Best for
- —Developers wanting zero-commitment, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing low-cost per-request pricing without rate limits
Not for
- —Users who need detailed API documentation or schemas before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone unable to transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/172 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific endpoint's purpose is undocumented. No request/response schema, no examples, and all doc pages rendered only a wallet-connect prompt. The endpoint path '/api/v1/transfers/172' does not match any listed API on the landing page, making its function unknown.
Warnings
- —The endpoint /api/v1/transfers/172 is not listed among the site's advertised APIs — its actual functionality is unknown.
- —All documentation pages (docs, api, pricing, README) rendered only a 'Connect wallet' prompt with no usable content.
- —No request or response schema is available; callers cannot know what parameters to send or what to expect back.
- —The generic title 'Premium API Access' provides no indication of the endpoint's purpose.
Citations
- —All endpoints priced at $0.02 per request, no API keys, no rate limits, Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired 20000 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/transfers/172
- —Site lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com