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/86` 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 given USDC's 6 decimals. 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 but appear to require a wallet connection to view, so detailed request/response schemas for individual endpoints are not available from the crawl.
Capabilities
Use cases
- —Agents needing on-demand AI inference (sentiment, summarization, classification, embeddings) without API key management
- —Fetching real-time crypto token quotes, gas estimates, or exchange rates with per-call payment
- —Running geocoding or data validation as a utility service from autonomous workflows
- —Exporting analytics data or generating insights reports on a pay-as-you-go basis
Fit
Best for
- —AI agents that need diverse utility endpoints behind a single payment protocol
- —Developers who want zero-signup, pay-per-use API access settled on-chain
- —Applications requiring low-cost micropayment-gated API calls ($0.02 each)
Not for
- —High-volume batch workloads where per-call pricing at $0.02 adds up quickly
- —Users who need detailed SLAs, guaranteed uptime, or enterprise support
- —Callers who cannot settle payments in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/orders/86 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, documentation pages are gated behind wallet connection and returned no useful content. No OpenAPI spec, no request/response schemas, and no concrete examples are available for this specific endpoint or any others. The purpose of '/api/v1/orders/86' specifically (vs. the named category endpoints) is unclear.
Warnings
- —Documentation pages (/docs, /api, /pricing, /README) all returned only 'Connect wallet' with no usable content
- —No OpenAPI or schema documentation available — request/response formats are unknown
- —The specific endpoint /api/v1/orders/86 is labeled 'Premium API Access' but its actual functionality is undocumented and unclear
- —The platform lists many endpoint categories but none could be verified beyond the landing page descriptions
Citations
- —All endpoints priced at $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 Base, equaling $0.02https://lowpaymentfee.com/api/v1/orders/86
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com