Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides pay-per-request API access using the x402 protocol, settling payments in USDC on the Base network. The specific resource `/api/v1/lab/results/36` is listed under "Premium API Access" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). No API keys, rate limits, or subscriptions are required — each request is individually paid via an X-PAYMENT header.
The broader lowpaymentfee.com platform offers a suite of endpoints spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request.
The specific endpoint `/api/v1/lab/results/36` appears to be a lab results resource, but no documentation describes what data it returns or what input it expects beyond a POST request with JSON content type. The endpoint is live and returns a valid x402 402 challenge. Without further documentation or schema details, the exact payload structure and response format remain unknown.
Capabilities
Use cases
- —Accessing premium data or lab results on a per-request basis without subscriptions
- —Agent-driven workflows that need pay-as-you-go API access settled in USDC on Base
- —Programmatic retrieval of resource #36 lab results via x402 payment protocol
Fit
Best for
- —Developers wanting zero-commitment, pay-per-use API access
- —AI agents with USDC on Base that need to purchase API calls autonomously
- —Users who prefer crypto micropayments over traditional API key subscriptions
Not for
- —Users needing detailed API documentation or well-defined schemas before integrating
- —High-volume consumers who would benefit from bulk pricing or subscription plans
- —Users without USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/36 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is no documentation on what `/api/v1/lab/results/36` actually returns, no request/response schema, and no examples. The crawled pages beyond the homepage are empty (just 'Connect wallet'). The endpoint's purpose is unclear — 'lab results' is unexplained.
Warnings
- —No documentation available for this specific endpoint — purpose of 'lab results/36' is unknown
- —No request body schema or response schema provided
- —No OpenAPI spec, README, or API docs found on the site
- —The /api, /pricing, and /README pages returned no useful content
Citations
- —Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/lab/results/36
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/36