Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.
What it does
This endpoint at `/api/v1/lab/results/54` is part of the lowpaymentfee.com platform, which offers a broad suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints are gated via the x402 payment protocol, settling in USDC on the Base network at $0.02 per request. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.
The specific endpoint `/api/v1/lab/results/54` is listed under the title "Premium API Access" but its exact functionality is not documented on the provider's site. The landing page groups endpoints into categories (Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure), but this particular path (`/lab/results/54`) does not appear in any of those categories. It may be an experimental or unlisted endpoint. The x402 challenge confirms it is live, accepts POST requests, returns `application/json`, and charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call on the Base network.
Because there is no OpenAPI schema, no request/response examples, and no documentation beyond the generic landing page, the actual input parameters and response structure are unknown. Agents should treat this as a minimally documented endpoint and test with exploratory calls.
Capabilities
Use cases
- —Fetching lab or experimental results via a single paid API call
- —Programmatic access to premium data without subscription or API key management
- —Agent-driven workflows that need on-demand paid data retrieval
Fit
Best for
- —Developers or agents wanting zero-setup, pay-as-you-go API access
- —x402-compatible agents that can settle USDC on Base
- —Low-volume or sporadic callers who prefer per-request pricing over subscriptions
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or rate-limited tiers
- —Anyone who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/54 \
-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), but there is no documentation for this specific path, no OpenAPI schema, no request/response examples, and the endpoint does not appear in the provider's own listed API catalog. Effectively a stub listing.
Warnings
- —Endpoint path /api/v1/lab/results/54 is not listed in the provider's public API catalog — purpose and parameters are unknown.
- —No OpenAPI spec, request schema, or response schema available.
- —No documentation pages returned meaningful content (pricing, README, and /api pages all showed only 'Connect wallet').
- —The title 'Premium API Access' is generic and does not describe what this endpoint actually returns.
Citations
- —The provider lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02 per request.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
- —The x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, which equals $0.02.https://lowpaymentfee.com/api/v1/lab/results/54