Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides pay-per-request API access using the x402 protocol, settling payments in USDC on the Base network. The specific resource `/api/v1/lab/results/16` is listed under "Premium API Access" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). No API keys, rate limits, or subscriptions are required — each request is paid individually via an X-PAYMENT header.
The broader lowpaymentfee.com platform offers a suite of endpoints spanning 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 utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request.
The specific endpoint `/api/v1/lab/results/16` is labeled "Premium API Access" but its exact response payload and purpose are not documented in the available material. The endpoint accepts POST requests and returns application/json. Without further documentation or an OpenAPI schema, the precise input parameters and output structure remain unknown.
Capabilities
Use cases
- —Accessing premium data or lab results behind a per-request paywall
- —Agent-driven workflows that need on-demand paid API calls without subscription management
- —Programmatic access to paid endpoints using USDC micropayments on Base
Fit
Best for
- —Agents or developers who want zero-commitment, pay-as-you-go API access
- —Use cases requiring no API key registration or rate limit negotiation
- —Crypto-native applications already operating on the Base network
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/16 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation of request/response formats, and the purpose of '/api/v1/lab/results/16' is entirely opaque. The crawled pages beyond the homepage returned only 'Connect wallet' with no useful content.
Warnings
- —No OpenAPI or schema documentation available — input parameters and response structure are unknown
- —The specific purpose of /api/v1/lab/results/16 ('Premium API Access') is not explained anywhere in the crawled material
- —The /api, /pricing, and /README pages returned no meaningful content
- —Cannot verify what data or service this endpoint actually provides
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/16
- —All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com