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/24` 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, 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 subscriptions are required — callers simply attach an x402 payment header to each request.
The specific endpoint probed (`/api/v1/lab/results/24`) is listed under the title "Premium API Access" but its exact functionality is unclear from the available documentation. The provider's landing page does not list this particular path among its advertised API categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure). It may be a lab/experimental endpoint or a resource-specific results retrieval path (the trailing `24` suggests a resource ID). The x402 challenge confirms it is live, accepts POST requests, and charges a maximum of 20,000 base units of USDC (i.e., $0.02) per call on the Base network.
The platform advertises no API keys, no rate limits, and instant access. Payment is handled entirely through the x402 protocol with USDC on Base (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The payment timeout is 300 seconds. No OpenAPI schema, detailed request/response documentation, or usage examples were found in the crawl.
Capabilities
Use cases
- —Retrieving lab or experimental results via a single paid API call
- —Integrating pay-per-request data retrieval into agent workflows without managing API keys
- —Programmatic access to resource-specific results gated by crypto micropayments
Fit
Best for
- —Developers wanting keyless, pay-per-call API access settled in USDC on Base
- —AI agents that can make x402-authenticated HTTP requests
- —Users who need low-friction, no-subscription access to data endpoints
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume consumers who prefer subscription-based pricing over per-call payments
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/24 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response documentation, no examples, and the specific purpose of `/api/v1/lab/results/24` is not explained anywhere in the crawled material. The endpoint path is not listed among the provider's advertised APIs, making its function uncertain.
Warnings
- —The endpoint path /api/v1/lab/results/24 is not listed among the provider's advertised API categories — its exact purpose is unknown.
- —No OpenAPI spec, request schema, or response schema is available.
- —No usage examples or detailed documentation were found; /pricing, /README, and /api pages returned only 'Connect wallet' with no content.
- —The trailing '24' in the path suggests a specific resource ID; behavior for other IDs is unknown.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/lab/results/24
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/lab/results/24
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Available API categories include Data & Analytics, AI & ML, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com