Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.
What it does
lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/wire/36` is listed as "Premium API Access" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per call), settled to a Base-network address.
The broader platform advertises multiple API categories including 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 utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments.
However, the specific endpoint probed (`/api/v1/wire/36`) does not clearly map to any of the named API categories on the landing page, and no documentation, request/response schemas, or usage examples are available. The docs, pricing, and API pages all returned only a "Connect wallet" prompt with no substantive content. Without knowing what `/api/v1/wire/36` actually returns, callers should treat this as an opaque premium endpoint with uncertain functionality.
Capabilities
Use cases
- —Programmatic access to a pay-per-call API without requiring API keys or subscriptions
- —Agent-driven workflows that need on-demand endpoint access settled in USDC on Base
- —Testing x402 payment flows against a live, low-cost endpoint
Fit
Best for
- —Developers exploring x402 payment protocol integrations
- —Agents that need keyless, per-request API access on Base
- —Low-volume or experimental use cases where $0.02/call is acceptable
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —High-volume production workloads where per-call pricing adds up quickly
- —Anyone who needs to know exactly what the endpoint returns before paying
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/36 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and no explanation of what /api/v1/wire/36 actually does. The docs pages are empty (wallet-connect only). The endpoint name 'Premium API Access' is generic and uninformative.
Warnings
- —No documentation available — docs, pricing, API, and README pages all return only a 'Connect wallet' prompt with no content.
- —The endpoint path /api/v1/wire/36 does not correspond to any named API on the landing page; its actual functionality is unknown.
- —No request or response schema is provided; callers cannot know what to send or what they will receive.
- —No OpenAPI spec, no examples, and no error handling documentation.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin, 6 decimals = $0.02) on Base networkhttps://lowpaymentfee.com/api/v1/wire/36
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform lists API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com
- —Docs, pricing, API, and README pages contain only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs