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 results resource (`/api/v1/lab/results/13`) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-request APIs 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 x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the x402 "exact" scheme to a designated wallet address, with the asset being USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys are needed; access is granted per-request upon payment. The platform advertises no rate limits and instant access.
The specific resource at `/api/v1/lab/results/13` is labeled "Premium API Access" but no further documentation describes what "lab results" data is returned. The response MIME type is `application/json`. Without an OpenAPI schema, request body format, or example responses, the exact data structure and purpose of this particular endpoint remain unclear. The broader site lists many endpoint categories but provides no detailed documentation for any of them.
Capabilities
Use cases
- —Retrieving lab results data (resource ID 13) on demand with per-call USDC payment
- —Integrating pay-per-request data access into agent workflows without API key management
- —Demonstrating x402 protocol payment flows on Base network
Fit
Best for
- —Agents or developers needing keyless, pay-per-call data access
- —x402 protocol integrations on Base
- —Low-cost micropayment API consumption
Not for
- —Users needing detailed API documentation or schema guarantees before integration
- —High-volume batch data retrieval where per-call pricing is inefficient
- —Use cases requiring non-USDC or non-Base payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/13 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation explaining what 'lab results/13' actually returns. The broader site provides only a listing of endpoints with no detail. This is effectively a stub listing.
Warnings
- —No documentation exists for the /api/v1/lab/results/13 endpoint — the purpose and schema of 'lab results' data is unknown
- —No OpenAPI spec, request body schema, or response examples are available
- —The broader site's /api, /pricing, and /README pages all returned only 'Connect wallet' with no useful content
- —The endpoint name 'Premium API Access' is generic and does not describe the actual data returned
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 base units of USDChttps://lowpaymentfee.com/api/v1/lab/results/13
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/lab/results/13
- —All APIs on the platform 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 endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com