Pay-per-call notification endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" notification resource at `/api/v1/notifications/46`. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network via the x402 protocol.
The specific `/api/v1/notifications/46` endpoint accepts POST requests and returns `application/json`. Payment is handled inline: callers attach an `X-PAYMENT` header containing a signed x402 payment for up to 20,000 base units of USDC (i.e., $0.02) to the payee address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. No API keys, accounts, or rate limits are advertised — access is purely gated by micropayment.
Documentation beyond the landing page is sparse. The `/api`, `/pricing`, and `/README` routes all resolve to a wallet-connect stub with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The exact purpose of the "notifications/46" resource (whether it sends, retrieves, or manages a notification) cannot be confirmed from the available material.
Capabilities
Use cases
- —Triggering or retrieving notifications via a single paid API call
- —Integrating pay-per-use notification delivery into agent workflows
- —Testing x402 micropayment flows against a live endpoint
Fit
Best for
- —Agents or bots that need simple, keyless API access gated by micropayment
- —Developers experimenting with x402 protocol integrations on Base
- —Low-volume, on-demand notification requests without subscription overhead
Not for
- —High-volume notification pipelines where per-call payment overhead is impractical
- —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/46 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-signed-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation for this specific endpoint, and the exact functionality of /notifications/46 is unknown. Score reflects a near-stub level of available information.
Warnings
- —No OpenAPI or schema documentation available for this endpoint.
- —The exact purpose of /api/v1/notifications/46 (send, retrieve, manage?) is undocumented.
- —All non-root pages (/api, /pricing, /README) returned only a wallet-connect stub with no content.
- —No example request or response payloads are available.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/notifications/46
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/notifications/46