Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/transfers/195` is listed as "Premium API Access" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the resource.
The broader platform advertises multiple API categories including 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 uniformly priced at $0.02 per request.
However, the specific functionality of the `/api/v1/transfers/195` endpoint is unclear. The name "Premium API Access" and the path segment "transfers/195" do not map obviously to any of the documented API categories. Documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no substantive content. Without an OpenAPI schema, request/response examples, or detailed documentation, it is difficult to determine what data or service this particular endpoint returns.
Capabilities
Use cases
- —Accessing premium API data without creating an account or managing API keys
- —Making one-off API calls with instant USDC micropayments on Base
- —Agent-driven workflows that need frictionless pay-per-use endpoints
Fit
Best for
- —Developers who want zero-signup API access via crypto payments
- —AI agents that can autonomously pay for API calls using x402
- —Users already holding USDC on the Base network
Not for
- —Users who need detailed API documentation or guaranteed SLAs before purchasing
- —Developers who prefer traditional API key authentication and fiat billing
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/195 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge), but there is no OpenAPI schema, no request/response examples, and documentation pages are empty stubs. The specific purpose of /api/v1/transfers/195 is unclear, making this effectively a stub listing.
Warnings
- —The exact functionality of /api/v1/transfers/195 ('Premium API Access') is undocumented and unclear from the path or description.
- —All documentation pages (/docs, /pricing, /README, /api) returned only 'Connect wallet' with no substantive content.
- —No OpenAPI spec, request schema, or response schema is available.
- —The endpoint path 'transfers/195' does not correspond to any of the advertised API categories on the landing page.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/transfers/195
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/transfers/195
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com