Pay-per-call notification endpoint on Base via x402 — $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/notifications/70` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. Each call is settled on the Base network using USDC (USD Coin) at a flat rate of $0.02 per request. The x402 challenge confirms the endpoint is live and accepts POST requests with an exact payment scheme.
The specific function of the `/api/v1/notifications/70` endpoint is not documented beyond the label "Premium API Access." The provider's landing page lists many endpoints across categories (analytics, AI, finance, infrastructure) but does not include this particular notifications path, so its exact behavior — whether it sends, retrieves, or manages notifications — is unclear. The response MIME type is `application/json`.
The platform advertises no API keys, no rate limits, and instant access. Payment is handled entirely through the x402 protocol: callers attach an `X-PAYMENT` header with a signed USDC payment on Base. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02. The payment recipient address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, and the payment timeout is 300 seconds.
Capabilities
Use cases
- —Triggering or retrieving notifications via a pay-per-call model without API key management
- —Integrating notification delivery into agent workflows that settle payments on Base
- —Testing x402 protocol integrations with a low-cost live endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol on Base
- —Agents needing keyless, pay-per-use notification endpoints
- —Low-volume or sporadic notification use cases where subscriptions are overkill
Not for
- —High-volume notification pipelines where $0.02/request adds up quickly
- —Users who need detailed documentation or guaranteed SLAs on notification behavior
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/notifications/70 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment-header>" \
-d '{}'Example
Request
{
"url": "https://lowpaymentfee.com/api/v1/notifications/70",
"body": {},
"method": "POST",
"headers": {
"X-PAYMENT": "<x402-signed-payment-header>",
"Content-Type": "application/json"
}
}Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/notifications/70 is entirely undocumented. No request/response schema, no examples, and the endpoint doesn't appear on the provider's own landing page. This is effectively a stub listing.
Warnings
- —The /api/v1/notifications/70 path is not listed on the provider's landing page — its exact functionality is unknown.
- —No request body schema or response schema is documented anywhere.
- —No OpenAPI spec, README, or detailed docs were found (pricing and README pages returned only 'Connect wallet').
- —The provider site lists many endpoints but provides no documentation for any of them beyond names and prices.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/notifications/70
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/notifications/70
- —Platform advertises $0.02/request, no API keys, no rate limits, instant accesshttps://lowpaymentfee.com
- —The notifications/70 endpoint is not listed among the provider's documented APIshttps://lowpaymentfee.com