Pay-per-request API platform on Base (USDC) via x402 — $0.02/call, no API keys required.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad set of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. Every endpoint costs $0.02 per request, paid in USDC on the Base network. There are no API keys, no rate limits, and no subscription commitments — callers simply attach an x402 payment header to each request.
The specific endpoint at `/api/v1/orders/17` is listed as "Premium API Access" and accepts POST requests. Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which has 6 decimals), equating to $0.02 per call. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The broader platform advertises additional endpoints including 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. However, documentation beyond the landing page is extremely sparse (docs, pricing, and README pages all render only a "Connect wallet" prompt), so the actual request/response schemas for these endpoints are unknown.
Capabilities
Use cases
- —Agents that need on-demand AI inference (sentiment, summarization, classification) without managing API keys
- —Fetching real-time crypto token quotes or gas estimates with per-call payment
- —Running geocoding or data validation as a utility service from an autonomous agent
- —Exporting analytics data or generating reports with zero subscription overhead
Fit
Best for
- —AI agents needing keyless, pay-as-you-go API access
- —Developers who want to avoid API key management and subscriptions
- —Low-volume or bursty workloads where per-request pricing is cost-effective
Not for
- —High-volume production workloads where bulk pricing would be cheaper
- —Users who need detailed API documentation and guaranteed SLAs
- —Callers who cannot settle payments in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/orders/17 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages beyond the landing page are empty stubs ('Connect wallet'). The purpose of the specific /orders/17 endpoint is unclear beyond the generic 'Premium API Access' label.
Warnings
- —Documentation pages (/docs, /pricing, /README, /api) are all empty — only a 'Connect wallet' prompt is rendered.
- —No OpenAPI or schema available; request and response formats for this endpoint are completely unknown.
- —The specific purpose of /api/v1/orders/17 ('Premium API Access') is not explained anywhere — it may be a demo or placeholder.
- —The platform lists many endpoints on its landing page but none have documented schemas or example payloads.
Citations
- —All endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The x402 challenge for /api/v1/orders/17 requires maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equating to $0.02.https://lowpaymentfee.com/api/v1/orders/17
- —The platform offers endpoints for analytics, AI/ML, finance/Web3, and infrastructure utilities.https://lowpaymentfee.com
- —Documentation, pricing, and README pages render only a 'Connect wallet' prompt with no substantive content.https://lowpaymentfee.com/docs