Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.
What it does
This x402-enabled endpoint at `/api/v1/lab/results/71` is part of the lowpaymentfee.com platform, which offers a suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance, and utility services. Each call is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per request, with no API keys, rate limits, or subscriptions required.
The specific endpoint `/api/v1/lab/results/71` is listed under the title "Premium API Access" but its exact data payload is not documented in the available crawl material. The broader platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires an exact payment of 20,000 base units of USDC (6 decimals → $0.02) to the address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.
Because this specific resource path (`/lab/results/71`) does not appear in the site's public API listing and no output schema or documentation describes what it returns, the actual response format and content are unknown. Agents should treat this as an opaque JSON endpoint until further documentation is available.
Capabilities
Use cases
- —Fetching lab or analytical results behind a per-call paywall
- —Programmatic access to premium data without subscription management
- —Agent-driven data retrieval with automatic crypto micropayments
Fit
Best for
- —Agents that need one-off data lookups without managing API keys
- —Developers testing x402 payment flows on Base
- —Low-volume consumers who prefer pay-per-use over subscriptions
Not for
- —High-volume batch processing where per-call fees add up quickly
- —Users who need detailed documentation or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/71 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific endpoint /api/v1/lab/results/71 has no documentation, no output schema, and no example responses. The endpoint path does not appear in the site's own API listing, making it effectively a stub listing.
Warnings
- —Endpoint path /api/v1/lab/results/71 is not listed on the provider's public API catalog — purpose and response format are unknown.
- —No OpenAPI spec, output schema, or example responses are available.
- —The 'Premium API Access' title is generic and does not describe what data is returned.
- —Other crawled pages (/api, /pricing, /README) returned only a 'Connect wallet' prompt with no useful content.
Citations
- —The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/71
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/lab/results/71
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com