Pay-per-call notification endpoint on Base via x402 — $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/notifications/7` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint is labeled "Premium API Access" and accepts POST requests. Payment is $0.02 per call (20,000 base units of USDC with 6 decimals), with no API keys, rate limits, or upfront commitments required.
The broader lowpaymentfee.com platform advertises 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 listed at $0.02 per request. However, the specific functionality of the `/api/v1/notifications/7` endpoint is not documented beyond its "Premium API Access" label — it is unclear what notification data or action it provides.
The endpoint is live and returns a valid x402 402 challenge. Payment is made in USDC (contract `0x8335…2913`) on Base to address `0x1A2B…85F3`, with a max timeout of 300 seconds. No OpenAPI schema, request/response examples, or detailed documentation were found for this specific endpoint.
Capabilities
Use cases
- —Sending or retrieving notifications via a pay-per-call model without API key management
- —Agent-initiated notification triggers settled instantly in USDC on Base
- —Integrating low-cost notification services into automated workflows
Fit
Best for
- —Developers wanting zero-signup, pay-per-use notification endpoints
- —AI agents that can settle x402 payments on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed documentation or guaranteed SLAs before integration
- —High-volume notification use cases where per-call pricing may add up
- —Anyone requiring fiat-only payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/notifications/7 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'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 actual functionality behind 'Premium API Access' at /api/v1/notifications/7 is entirely unclear. The crawled site pages beyond the landing page returned only 'Connect wallet' with no useful content.
Warnings
- —No documentation found for the /api/v1/notifications/7 endpoint — its actual functionality is unknown
- —No OpenAPI or schema available; request body and response format are undocumented
- —The /pricing, /api, and /README pages returned no meaningful content
- —The endpoint name 'Premium API Access' is generic and does not describe what the endpoint does
Citations
- —The endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 in USDC on Basehttps://lowpaymentfee.com/api/v1/notifications/7
- —All endpoints on the platform are priced at $0.02 per request with no API keys, rate limits, or commitmentshttps://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/notifications/7