Pay-per-call API platform on Base network via x402 — $0.02/request 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/transfers/114` is listed as "Premium API Access" but its exact functionality is not documented in the available crawl material. The x402 challenge confirms it is live, accepts POST requests, and requires up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The broader platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. Documentation pages beyond the landing page returned only a "Connect wallet" prompt with no further technical detail, so request/response schemas for individual endpoints are unknown.
Capabilities
Use cases
- —Agents that need on-demand API access without managing API keys or subscriptions
- —Paying per-call for AI inference (sentiment, summarization, classification, embeddings)
- —Fetching real-time financial data or crypto gas estimates with micropayments
- —Geocoding or data conversion as a utility service
Fit
Best for
- —AI agents needing frictionless, keyless API access via x402
- —Developers who want pay-as-you-go pricing with no commitments
- —Crypto-native workflows that can settle in USDC on Base
Not for
- —High-volume production workloads where per-request pricing adds up quickly
- —Users who need detailed API documentation or guaranteed SLAs
- —Callers who cannot produce x402 payment headers (no USDC on Base)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/transfers/114 \
-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 the specific endpoint's purpose ("Premium API Access" at /transfers/114) is undocumented. No request/response schemas, no examples, and all doc pages beyond the landing page are empty. The listing is effectively a stub with confirmed liveness.
Warnings
- —The exact functionality of /api/v1/transfers/114 ('Premium API Access') is not documented anywhere in the crawl material.
- —All documentation, pricing, API, and README pages returned only 'Connect wallet' with no technical content.
- —No request or response schemas are available for any endpoint on the platform.
- —The broad catalog of endpoints (AI, finance, analytics, etc.) is advertised but none have been individually verified beyond the landing page listing.
Citations
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge for /api/v1/transfers/114 requires maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.https://lowpaymentfee.com/api/v1/transfers/114
- —The platform advertises endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com