x402-gated lab results endpoint on Base, pay-per-call with USDC at $0.02/request.
What it does
This endpoint at `/api/v1/lab/results/8` is part of the lowpaymentfee.com platform, which offers a suite of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. The specific resource at path `/lab/results/8` is labeled "Premium API Access" and returns JSON content gated behind an x402 payment challenge. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) at a maximum cost of $0.02 per request (20,000 base units with 6 decimals).
The platform advertises a simple pricing model: $0.02 per request across all endpoints, with no API keys, no rate limits, no minimums, and instant access. The x402 challenge was confirmed live via a POST probe returning HTTP 402 with a well-formed x402 version 1 challenge. However, the specific purpose of the `/lab/results/8` endpoint is unclear — the provider's landing page does not list it among its documented API categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure). The "lab" path segment and numeric ID suggest it may be an experimental or test endpoint, or it could return a specific pre-computed result set.
No OpenAPI schema, detailed documentation, or example responses were found for this specific endpoint. The crawled /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no additional content. Without documentation on the request body format or response structure, callers will need to experiment to determine what this endpoint actually returns.
Capabilities
Use cases
- —Retrieving a specific lab result or pre-computed data set via pay-per-request
- —Testing x402 payment protocol integration with a low-cost endpoint
- —Accessing gated JSON data without API key registration
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-call data access on Base
- —Low-cost per-request data retrieval without subscriptions
Not for
- —Users needing well-documented API contracts with clear schemas
- —High-volume batch processing where per-request pricing adds up
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/8 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation on what /lab/results/8 actually returns, no request/response schema, and the endpoint is not listed on the provider's own landing page. The crawled docs pages were empty beyond a wallet connect prompt.
Warnings
- —The /api/v1/lab/results/8 path is not listed among the provider's documented endpoints — it may be experimental or undocumented.
- —No request body schema or response schema is available; callers must discover the contract by trial.
- —The /api, /pricing, and /README pages returned no useful content beyond 'Connect wallet'.
- —The purpose and data content of this specific endpoint are unknown.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/8
- —The platform charges $0.02 per request with no API keys, no rate limits, and no minimumshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/lab/results/8