x402-gated API suite on Base: analytics, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is a multi-category API platform that gates access via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/trades/101` is listed as "Premium API Access" and accepts payment in USDC (contract 0x8335…) on Base. The x402 challenge shows a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 per request — consistent with the site's advertised flat pricing of $0.02/request across all endpoints.
The broader 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 the same $0.02 price point.
The platform emphasizes simplicity: no API keys, no rate limits, no commitments, and instant access. Payment is handled entirely through the x402 protocol using USDC on the Base L2 network. Documentation pages (/docs, /pricing, /README) appear to require a wallet connection and returned no substantive content during the crawl, so detailed request/response schemas for the `/trades/101` endpoint are unknown. The endpoint accepts POST requests and returns application/json, but the specific payload structure is not documented in the available material.
Capabilities
Use cases
- —Fetching trade data or trade-related records via a single paid API call
- —Programmatic access to premium data without managing API keys or subscriptions
- —Agent-driven workflows that need on-demand paid data retrieval on Base
Fit
Best for
- —Developers wanting zero-signup, pay-per-call API access
- —AI agents that can settle x402 payments in USDC on Base
- —Users who prefer crypto micropayments over traditional subscription billing
Not for
- —Users who need free or trial access before paying
- —Applications requiring detailed OpenAPI documentation and typed schemas
- —High-volume consumers who would benefit from bulk/subscription pricing
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/trades/101 \
-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 there is no OpenAPI schema, no request/response examples, and documentation pages returned no content. The specific purpose of /api/v1/trades/101 is undocumented beyond the generic label 'Premium API Access'.
Warnings
- —No OpenAPI or request/response schema available for this endpoint
- —Documentation, pricing, and README pages all require wallet connection and returned no useful content
- —The specific data returned by /api/v1/trades/101 is undocumented — 'Premium API Access' is a generic label
- —Cannot verify what trade data (if any) this endpoint actually returns
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/trades/101
- —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