Pay-per-call premium API endpoint on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at `/api/endpoint-42` is part of the lowpaymentfee.com platform, which offers a collection 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 platform advertises a flat $0.02 per request with no API keys, no rate limits, and instant access.
The specific endpoint `/api/endpoint-42` is labeled "Premium API Access" but its exact functionality is not documented beyond that generic title. The x402 challenge confirms it is live, accepts POST requests, and requires payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is application/json.
The broader platform lists endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and more — all at the same $0.02 price point. However, documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no substantive content, so detailed request/response schemas, parameter descriptions, and example payloads are unavailable for this or any other endpoint on the platform.
Capabilities
Use cases
- —Programmatic access to a premium API service with per-call USDC micropayments
- —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
- —Testing x402 payment protocol integrations against a live endpoint
Fit
Best for
- —Developers exploring x402 payment-gated APIs
- —AI agents that can settle USDC micropayments on Base
- —Users who want no-signup, no-rate-limit API access
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone without a Base-compatible USDC wallet
- —Use cases requiring free or subscription-based pricing
Quick start
curl -X POST https://lowpaymentfee.com/api/endpoint-42 \
-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 the specific functionality of /api/endpoint-42 is completely undocumented. No request/response schema, no examples, and all documentation pages are empty stubs showing only 'Connect wallet'. The generic 'Premium API Access' label provides no actionable information about what the endpoint actually does.
Warnings
- —The exact functionality of /api/endpoint-42 is unknown — 'Premium API Access' is a generic label with no further documentation.
- —All documentation pages (/docs, /pricing, /README, /api) returned only 'Connect wallet' with no substantive content.
- —No request or response schema is available; callers cannot know what parameters to send or what data to expect.
- —The platform lists many endpoints but none appear individually documented.
Citations
- —The platform charges $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The x402 challenge confirms the endpoint is live, accepts POST, and requires up to 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.https://lowpaymentfee.com/api/endpoint-42
- —The platform offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories.https://lowpaymentfee.com