Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning 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, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.
The specific endpoint at `/api/v1/policies/98` is listed as "Premium API Access" and returns `application/json` via POST. Its x402 challenge advertises a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. This is consistent with the site's uniform $0.02/request pricing.
The platform's landing page lists 16 endpoints across four 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 (geocoding, validation, conversion, generation). Documentation pages beyond the landing page were largely empty (showing only "Connect wallet"), so detailed request/response schemas for individual endpoints are not available.
Capabilities
Use cases
- —Agents needing on-demand API access without pre-registration or API keys
- —Paying per-call for AI inference tasks like sentiment analysis or text summarization
- —Fetching real-time financial data (prices, exchange rates, gas estimates) with micropayments
- —Running geocoding or data validation utilities without subscription commitments
Fit
Best for
- —AI agents that need frictionless, keyless API access via x402
- —Developers prototyping with low-cost pay-per-request endpoints
- —Web3-native applications already operating on Base network
Not for
- —High-volume production workloads where subscription pricing would be cheaper
- —Users who need detailed API documentation and response schemas before integrating
- —Applications requiring non-USDC or non-Base-network payment settlement
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/policies/98 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and documentation pages are empty stubs. The specific purpose of /api/v1/policies/98 ('Premium API Access') is vague and undocumented. This is effectively a stub listing.
Warnings
- —Documentation pages (/docs, /api, /pricing, /README) all render as empty 'Connect wallet' stubs — no usable docs available.
- —The specific purpose and expected input/output of /api/v1/policies/98 is undocumented; 'Premium API Access' is the only description.
- —No OpenAPI spec, request schema, or response schema is available for any endpoint.
- —The platform lists 16 endpoints but none have detailed documentation — actual functionality is unverifiable.
Citations
- —Uniform pricing of $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/policies/98
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com