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/2` is part of the lowpaymentfee.com platform, a collection of pay-per-request APIs accessible via the x402 payment protocol on the Base network. The endpoint is labeled "Premium API Access" and accepts POST requests, settling payments in USDC (contract `0x8335…2913` on Base). The x402 challenge advertises a maximum amount of 20,000 base units of USDC (6 decimals), which equals $0.02 per request.
The broader lowpaymentfee.com platform offers endpoints across several 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 (geocoding, validation, conversion, generation). All endpoints are priced uniformly at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.
The specific functionality of the `/api/v1/notifications/2` endpoint is not documented beyond its "Premium API Access" label. There is no OpenAPI schema, no request/response examples, and no detailed documentation available from the crawled pages. The endpoint is confirmed live (returning a valid 402 x402 challenge), but what it actually returns upon successful payment is unknown.
Capabilities
Use cases
- —Sending or retrieving notifications via a pay-per-call model without API key management
- —Integrating low-cost notification services into agent workflows on Base
- —Testing x402 payment protocol integrations with a cheap live endpoint
Fit
Best for
- —Developers experimenting with x402 payment-gated APIs
- —Agent pipelines needing keyless, pay-per-use notification endpoints
- —Low-volume use cases where $0.02/request is cost-effective
Not for
- —High-volume notification workloads where per-request costs add up quickly
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/notifications/2 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but there is no documentation on what the notifications endpoint actually does, no request/response schema, and no examples. The listing title is generic ('Premium API Access') and the crawled pages provide no specifics about this particular route. This is effectively a stub.
Warnings
- —No documentation exists for the /api/v1/notifications/2 endpoint beyond its generic label
- —No OpenAPI schema, request body schema, or response schema available
- —The actual functionality (send notification? retrieve notification? what is '2'?) is entirely unknown
- —No robots.txt or agents.txt found at the origin
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/notifications/2
- —All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/notifications/2