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 52) 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 specific resource `/api/v1/lab/results/52` is labeled "Premium API Access" and accepts POST requests. Payment is handled via the x402 protocol: callers receive a 402 challenge containing the payment details (asset, amount, payTo address) and must include a valid X-PAYMENT header to access the resource. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys, rate limits, or upfront commitments are required.
Notably, this particular endpoint (`/api/v1/lab/results/52`) does not appear in the site's publicly listed API catalog, which focuses on analytics, AI, finance, and utility endpoints. The nature of the "lab results" data returned is unclear from available documentation. The platform's landing page confirms Base network settlement, USDC payments, and a uniform $0.02 pricing model across all endpoints.
Capabilities
Use cases
- —Retrieving specific lab result data (resource 52) via a single paid request
- —Demonstrating x402 payment protocol integration for agent-to-API commerce
- —Accessing premium data without API key registration or subscriptions
Fit
Best for
- —Developers experimenting with x402 payment flows
- —Agents needing one-shot paid data retrieval on Base
- —Projects requiring keyless, pay-as-you-go API access
Not for
- —Bulk data retrieval requiring thousands of calls (no volume discounts apparent)
- —Users who need detailed documentation or schema definitions for the response payload
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/52
# Returns 402 with x402 challenge. Include X-PAYMENT header with valid payment proof to access the resource.Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no documentation on what the /api/v1/lab/results/52 resource actually returns, no response schema, no example payloads, and the endpoint is not listed in the site's public catalog. This is effectively a stub listing.
Warnings
- —The endpoint /api/v1/lab/results/52 is not listed in the provider's public API catalog — its purpose and response format are unknown.
- —No response schema or example response is available; callers cannot predict the shape of the data returned.
- —The /pricing, /api, and /README pages returned only a 'Connect wallet' prompt with no useful documentation.
- —The term 'lab results' could imply medical/health data, which may be subject to regulatory requirements (e.g., HIPAA), but there is no evidence to confirm or deny this.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/52
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/lab/results/52
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The site lists APIs in categories: Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com