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/35`. It is part of a broader platform offering dozens of pay-per-request 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/35` 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 is minimal. The platform's landing page lists endpoint paths and prices but provides no request/response schemas, parameter descriptions, or usage examples. The exact functionality behind the "notifications/35" resource is not documented — it could be a notification retrieval, creation, or delivery endpoint. Without further documentation or example payloads, callers will need to experiment or contact the provider to understand the expected input and output formats.
Capabilities
Use cases
- —Sending or retrieving notifications via a pay-per-call model without API key management
- —Integrating notification functionality into agent workflows that settle payments in USDC on Base
- —Testing x402 micropayment flows against a live, low-cost endpoint
Fit
Best for
- —Developers exploring x402 protocol integration with minimal cost
- —Agent-based systems that need stateless, key-free API access
- —Micropayment-gated notification delivery or retrieval
Not for
- —Production notification systems requiring documented SLAs and schemas
- —High-volume notification pipelines where per-request pricing is impractical
- —Users who need detailed API documentation before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/notifications/35 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-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 documentation for the notifications/35 resource — no request schema, no response schema, no parameter descriptions, and no usage examples. The endpoint's actual functionality is unknown.
Warnings
- —No API documentation exists for /api/v1/notifications/35 — the purpose and expected payload are undocumented.
- —No request or response schema is available; callers must guess at the expected input format.
- —The broader platform lists many endpoints but none have detailed docs beyond a name and price.
- —The /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/notifications/35
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/notifications/35
- —The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com