Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides access to a specific lab result resource (ID 82) behind an x402 paywall. 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.
The specific resource at `/api/v1/lab/results/82` is labeled "Premium API Access" in the x402 challenge but lacks further documentation about what data it returns. The x402 challenge confirms the endpoint is live, accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals), and pays out to a specified Ethereum address. No API keys or rate limits are advertised; access is gated purely by per-call USDC micropayments.
The platform's landing page lists additional endpoints across categories like sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more — all at the same $0.02 price point. However, no OpenAPI schema, detailed documentation, or example responses are available for any of these endpoints, including the one being listed here. The exact structure and content of the response for `/api/v1/lab/results/82` is unknown.
Capabilities
Use cases
- —Retrieving lab result data (ID 82) with a single USDC micropayment
- —Demonstrating x402 protocol-based API monetization
- —Programmatic access to gated data without API key management
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that can settle USDC micropayments on Base
- —Use cases requiring keyless, per-call API access
Not for
- —Users needing detailed documentation or guaranteed SLAs before integrating
- —Bulk data retrieval where per-call pricing becomes expensive
- —Anyone who needs to understand the response schema before paying
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/82 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no example responses, and the purpose of 'lab/results/82' is entirely opaque. The broader platform lists many endpoints but provides no detail on any of them.
Warnings
- —No documentation exists for what /api/v1/lab/results/82 actually returns
- —No OpenAPI or output schema available — response format is unknown
- —The endpoint name 'lab/results/82' is ambiguous; 'lab' could mean laboratory data, experimental/test data, or something else entirely
- —All ancillary pages (pricing, README, api) returned only a 'Connect wallet' prompt with no useful content
Citations
- —The endpoint returns HTTP 402 with an x402 challenge requiring USDC payment on Basehttps://lowpaymentfee.com/api/v1/lab/results/82
- —maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals) = $0.02https://lowpaymentfee.com/api/v1/lab/results/82
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform lists endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com