Pay-per-call API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/request.
What it does
lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across 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 utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, paid in USDC on the Base network.
The specific endpoint at `/api/v1/wire/175` is listed as "Premium API Access" and returns a valid x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. Payment is made via the x402 exact scheme — no API keys, subscriptions, or rate limits are advertised. The endpoint accepts HTTP POST and returns application/json.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/wire/175` endpoint actually returns. The landing page lists many endpoints but provides no detail on input parameters or response formats for any of them. Without documentation it is unclear what data or functionality this specific endpoint provides beyond its generic "Premium API Access" label.
Capabilities
Use cases
- —Accessing data analytics or AI inference endpoints without subscription commitments
- —Making one-off API calls paid in USDC on Base with no account setup
- —Integrating pay-per-request utility services (geocoding, validation, conversion) into agent workflows
Fit
Best for
- —Developers who want zero-friction API access without API keys or accounts
- —Agents and bots that can settle x402 payments autonomously on Base
- —Users who need occasional API calls and prefer pay-as-you-go pricing
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or rate-limited plans
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/wire/175 \
-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 OpenAPI schema, no request/response examples, and the endpoint name 'Premium API Access' is completely generic. It is impossible to determine what this endpoint actually does from the available material.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI or schema describing request parameters or response format for /api/v1/wire/175
- —The endpoint name 'Premium API Access' is generic and does not describe actual functionality
- —Cannot verify what data or service this specific endpoint provides
Citations
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/wire/175
- —Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com