Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This x402-enabled endpoint at `/api/v1/lab/results/67` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. Each call is settled on the Base network using USDC with no API keys, no rate limits, and no subscriptions — just a per-request micropayment of $0.02.
The specific endpoint `/api/v1/lab/results/67` is listed under the title "Premium API Access" and accepts HTTP POST requests. The x402 challenge confirms it is live, requiring a maximum of 20,000 base units of USDC (i.e., $0.02) per call, paid to address `0x1A2B…85F3` on Base. The response MIME type is `application/json`. However, the exact nature of the data returned by this particular "lab/results" path is not documented in the crawled material — the endpoint does not appear in the site's publicly listed API catalog, so its purpose must be inferred or discovered by calling it.
The broader lowpaymentfee.com platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. No OpenAPI schema or detailed request/response documentation was found during the crawl.
Capabilities
Use cases
- —Fetching lab or analytical results behind a micropayment wall
- —Programmatic access to premium data without subscription commitments
- —Agent-driven data retrieval with automatic crypto micropayments
Fit
Best for
- —Developers wanting zero-friction, keyless API access
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer pay-per-use over monthly subscriptions
Not for
- —Users who need detailed API documentation or OpenAPI specs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone unable to transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/67 \
-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 OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/lab/results/67 is undocumented — it doesn't appear in the site's own catalog. This is effectively a stub listing with verified liveness but minimal usable documentation.
Warnings
- —The endpoint path /api/v1/lab/results/67 does not appear in the provider's publicly listed API catalog — its exact purpose is unknown.
- —No OpenAPI spec, request schema, or response schema is available.
- —No documentation pages returned meaningful content (pricing, README, and /api pages only showed 'Connect wallet').
- —The 'lab/results' naming suggests possible health/medical data — verify regulatory compliance if applicable.
Citations
- —The site advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge requires 20,000 base units of USDC (USD Coin, 6 decimals = $0.02) on the Base network.https://lowpaymentfee.com/api/v1/lab/results/67
- —The platform lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories.https://lowpaymentfee.com