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, rate limits, or subscriptions are required — callers simply attach an x402 payment header to each request.
The specific endpoint at `/api/v1/orders/92` 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 wallet connection and contain no visible content. No OpenAPI schema, request/response examples, or detailed endpoint documentation were found in the crawl.
Capabilities
Use cases
- —Agent-driven API calls where per-request crypto payment replaces API key management
- —Accessing AI inference (sentiment, summarization, classification, embeddings) without subscriptions
- —Fetching real-time financial data and crypto quotes on a pay-as-you-go basis
- —Geocoding, validation, and data conversion utilities with no rate limits
- —Exporting analytics data and insights without upfront commitments
Fit
Best for
- —AI agents and bots that need frictionless, keyless API access
- —Developers who prefer pay-per-use over subscription billing
- —Crypto-native applications already operating on the Base network
Not for
- —High-volume production workloads where per-request pricing at $0.02 adds up quickly
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —Applications that cannot handle x402 payment flows or USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/orders/92 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no request/response examples, and documentation pages are empty (wallet-gated). The specific purpose of `/api/v1/orders/92` ("Premium API Access") is unclear — it could be a generic demo or a specific order resource. The listing is effectively a stub with confirmed liveness.
Warnings
- —Documentation pages (/docs, /api, /pricing, /README) all render only 'Connect wallet' with no visible content — docs are inaccessible without wallet connection.
- —No OpenAPI or JSON schema is available; request and response formats are unknown.
- —The specific endpoint /api/v1/orders/92 has a generic 'Premium API Access' description — its actual functionality is unclear and may differ from the catalog endpoints listed on the homepage.
- —The platform lists many endpoint categories (AI, finance, analytics, etc.) but none have documented input/output schemas; actual functionality is unverified.
Citations
- —All endpoints are priced at $0.02 per request with no API keys, rate limits, or minimumshttps://lowpaymentfee.com
- —The platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —The x402 challenge for /api/v1/orders/92 requests maxAmountRequired of 20000 base units of USDC on Base with a 300-second timeouthttps://lowpaymentfee.com/api/v1/orders/92
- —Payment is in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on the Base networkhttps://lowpaymentfee.com/api/v1/orders/92