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 89) behind an x402 paywall. The provider operates a broad suite 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. No API keys, rate limits, or subscriptions are required; callers simply attach an x402 payment header to each POST request.
The specific resource `/api/v1/lab/results/89` is listed under the title "Premium API Access" but does not appear in the provider's public catalog of endpoints. The catalog groups endpoints into four categories: Data & Analytics (metrics, reports, export, insights), AI & Machine Learning (sentiment, summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). It is unclear what data this particular lab-results endpoint returns—it may be a test/demo resource or an unlisted internal endpoint.
The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is via the "exact" scheme on Base mainnet, requiring up to 20,000 base units of USDC (contract 0x8335…2913, 6 decimals), which equals $0.02. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. Response MIME type is application/json.
Capabilities
Use cases
- —Fetching lab result data for resource ID 89 via a single paid request
- —Demonstrating x402 payment flow on Base with USDC
- —Integrating pay-per-call data access into an agent workflow without API key management
Fit
Best for
- —Developers experimenting with x402 payment protocol on Base
- —Agents that need keyless, pay-as-you-go API access
- —Low-volume consumers who want no subscription commitment
Not for
- —High-volume batch retrieval where per-request fees add up
- —Users who need detailed documentation or schema definitions before integrating
- —Anyone requiring non-USDC or non-Base payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/89 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"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 this specific lab-results endpoint returns, no request/response schema, no examples, and the endpoint does not appear in the provider's own public catalog. The purpose and data content are essentially unknown.
Warnings
- —The endpoint /api/v1/lab/results/89 is not listed in the provider's public API catalog—its purpose and response format are unknown.
- —No request body schema or response schema is documented anywhere.
- —Crawled /api, /pricing, and /README pages returned only 'Connect wallet' with no useful content.
- —This may be a test or demo endpoint rather than a production data source.
Citations
- —The provider lists APIs at $0.02/request across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com
- —Pricing is $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (6 decimals = $0.02) on Base with a 300-second timeout.https://lowpaymentfee.com/api/v1/lab/results/89