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/61` is part of the lowpaymentfee.com platform, which offers a broad suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific endpoint listed here is described as "Premium API Access" and accepts POST requests.
The x402 challenge confirms the endpoint is live and requires a maximum payment of 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's advertised flat pricing of $0.02/request across all endpoints. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.
The platform advertises no API keys, no rate limits, and instant access. However, there is no OpenAPI schema, no documentation beyond the landing page, and no example request/response payloads available. The specific functionality of the `/api/v1/notifications/61` endpoint is unclear — the generic label "Premium API Access" does not describe what the notification resource does or what input it expects. This makes it difficult for agents to use without additional context.
Capabilities
Use cases
- —Triggering or retrieving notifications via a paid API call
- —Agent-initiated pay-per-use notification delivery
- —Programmatic access to a notification resource without API keys
Fit
Best for
- —Agents needing keyless, pay-per-call API access on Base
- —Developers experimenting with x402 payment protocol integrations
- —Low-volume consumers who prefer per-request pricing over subscriptions
Not for
- —Users who need detailed API documentation or schemas before integrating
- —High-volume notification use cases where per-call pricing adds up
- —Anyone requiring guaranteed SLAs or support contracts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/notifications/61 \
-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, no OpenAPI schema, no example requests or responses, and the purpose of the /notifications/61 resource is entirely opaque. The generic 'Premium API Access' label provides no functional clarity.
Warnings
- —No OpenAPI or schema documentation available for this endpoint
- —The specific functionality of /api/v1/notifications/61 is undocumented — 'Premium API Access' is a generic label
- —No example request or response payloads are available
- —The /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content
Citations
- —The endpoint returns a 402 challenge requiring USDC payment of 20000 base units (=$0.02) on Base networkhttps://lowpaymentfee.com/api/v1/notifications/61
- —The platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/notifications/61