Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/lab/results/37` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request with no API keys, no rate limits, and no subscriptions required.
The specific resource `/api/v1/lab/results/37` is listed under the title "Premium API Access" but its exact data payload is unclear — the path suggests it returns results for a specific lab or experiment identified by ID 37. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires a maximum payment of 20,000 base units of USDC (0.02 USD) on Base (asset contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The response MIME type is `application/json`.
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. No OpenAPI schema, detailed documentation, or example responses were found for any endpoint, so the exact request/response shape for this particular resource is unknown.
Capabilities
Use cases
- —Fetching lab or experiment results on-demand with per-call payment
- —Integrating pay-per-use data endpoints into agent workflows without managing API keys
- —Accessing structured JSON data behind a crypto-native paywall
Fit
Best for
- —Agents or developers who want keyless, pay-per-request API access
- —Use cases requiring low-friction micropayments on Base L2
- —Scenarios where subscription-free, on-demand data retrieval is preferred
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume batch processing where per-call pricing becomes expensive
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/37 \
-H "X-PAYMENT: <x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no OpenAPI schema, no documentation, no example request/response, and the purpose of '/api/v1/lab/results/37' is ambiguous. The crawled pages beyond the homepage returned only 'Connect wallet' with no useful content.
Warnings
- —No documentation or OpenAPI schema available for this endpoint
- —The exact purpose and response format of /api/v1/lab/results/37 is unknown — 'Premium API Access' is a generic label
- —No example responses or request body schemas were found anywhere on the site
- —The /api, /pricing, and /README pages returned no meaningful content
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/lab/results/37
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/lab/results/37