Pay-per-call notification endpoint on Base via x402, settling in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides a notifications API accessible via the x402 payment protocol. The specific resource `/api/v1/notifications/1` accepts POST requests and charges 20,000 base units of USDC (USD Coin, 6 decimals) on the Base network, which equals $0.02 per request. Payment is handled inline via the X-PAYMENT header — no API keys, accounts, or rate limits are required.
The provider operates a broader platform offering multiple pay-per-call 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 listed at $0.02 per request and settle on the Base network using USDC.
The specific functionality of the `/api/v1/notifications/1` endpoint is not documented beyond its title "Premium API Access." No request/response schema, parameter documentation, or usage examples are provided by the site. The endpoint is confirmed live, returning a valid x402 402 challenge with scheme "exact" and a 300-second payment timeout.
Capabilities
Use cases
- —Sending or triggering notifications via a single paid API call
- —Agent-initiated alerts or messages without requiring account setup
- —Testing x402 payment flows with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol integrations
- —AI agents needing a simple pay-per-call notification trigger
- —Use cases requiring no API key or account registration
Not for
- —Production notification systems requiring documented SLAs and schemas
- —High-volume notification delivery where per-call pricing is inefficient
- —Users who need detailed request/response documentation before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/notifications/1 \
-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 on what the notifications endpoint actually does, no request/response schema, and no examples. The endpoint's purpose beyond its generic title is entirely unknown, making it effectively a stub listing.
Warnings
- —No documentation exists for the /api/v1/notifications/1 endpoint — its actual functionality is unknown.
- —No request body schema or response schema is provided; callers cannot know what to send or expect back.
- —The site's /api, /pricing, and /README pages all return only a 'Connect wallet' prompt with no useful content.
- —The endpoint title 'Premium API Access' is generic and does not describe the service.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/notifications/1
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/notifications/1
- —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 platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com