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/orders/90` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. The payment scheme is "exact" with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.
The broader platform advertises endpoints in 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 exist at /docs, /pricing, and /api but currently render only a wallet-connect prompt with no substantive content, so the actual request/response schemas for individual endpoints are unknown.
Capabilities
Use cases
- —Agent-driven data retrieval without managing API keys or subscriptions
- —On-demand AI inference (sentiment, summarization, classification, embeddings) paid per call
- —Fetching real-time crypto prices, gas estimates, and exchange rates via micropayments
- —Geocoding and data validation as utility microservices
- —Programmatic data export and analytics without upfront commitments
Fit
Best for
- —AI agents needing frictionless, keyless API access via x402
- —Developers who want pay-as-you-go pricing with no minimums or rate limits
- —Web3-native applications that can settle payments in USDC on Base
Not for
- —High-volume batch workloads where per-request pricing becomes expensive compared to subscription plans
- —Users without a Base-compatible wallet or USDC holdings
- —Applications requiring detailed SLAs, guaranteed uptime, or enterprise support
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/orders/90 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, documentation pages are empty (wallet-connect only), there is no OpenAPI spec, no request/response schema, and no examples. The specific purpose of /api/v1/orders/90 ('Premium API Access') is vague and undifferentiated from the other endpoints listed on the site.
Warnings
- —Documentation pages (/docs, /pricing, /api, /README) render only a wallet-connect prompt with no actual content
- —No OpenAPI or schema available — request and response formats for all endpoints are unknown
- —The specific endpoint /api/v1/orders/90 is labeled 'Premium API Access' but is not listed on the homepage catalog, making its purpose unclear
- —No information on uptime, SLAs, or data sources behind any of the advertised endpoints
Citations
- —All endpoints are priced at $0.02 per request with no minimums, no API keys, and no rate limitshttps://lowpaymentfee.com
- —The x402 challenge for /api/v1/orders/90 requests maxAmountRequired of 20000 base units of USDC (6 decimals = $0.02) on Base networkhttps://lowpaymentfee.com/api/v1/orders/90
- —The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/orders/90