Pay-per-call notification endpoint on Base via x402, settling in USDC at $0.02/request.
What it does
This endpoint at `/api/v1/notifications/69` is part of the lowpaymentfee.com platform, which offers a suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific resource at this path is labeled "Premium API Access" and accepts POST requests.
The x402 challenge confirms the endpoint is live and requires a payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals), which equals $0.02 per request. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the "exact" scheme with a 300-second timeout. No API keys or rate limits are advertised; access is gated purely by micropayment.
The exact functionality behind the `/notifications/69` path is unclear — the provider's landing page does not list this specific route among its documented APIs. The name "Premium API Access" is generic and does not describe what the notification resource returns or expects as input. There is no OpenAPI spec, no request/response schema beyond the x402 outputSchema stub, and the crawled /api, /pricing, and /README pages returned only a wallet-connect prompt with no additional documentation.
Capabilities
Use cases
- —Sending or retrieving notifications via a pay-per-call model without API key management
- —Integrating micropayment-gated notification delivery into agent workflows
- —Testing x402 payment flows against a low-cost live endpoint
Fit
Best for
- —Developers experimenting with x402 micropayment protocol on Base
- —Agents that need keyless, pay-per-use API access
- —Low-volume notification use cases where per-request billing is preferred
Not for
- —High-volume notification pipelines where per-request cost adds up
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/notifications/69 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation for this specific route, no OpenAPI spec, no request/response schema, and the crawled pages beyond the landing page were empty wallet-connect prompts. The purpose of /notifications/69 is unknown.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The /notifications/69 path is not listed among the provider's documented APIs on the landing page
- —Crawled /api, /pricing, and /README pages returned no useful content (wallet-connect only)
- —Exact input format and response structure are unknown — no example request or response can be provided
- —The generic label 'Premium API Access' does not describe the endpoint's actual functionality
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)https://lowpaymentfee.com/api/v1/notifications/69
- —The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —The landing page lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories but does not include /api/v1/notifications/69https://lowpaymentfee.com