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 lowpaymentfee.com provides access to a specific lab results resource (`/api/v1/lab/results/73`) via HTTP POST, paid per-request in USDC on the Base network. The endpoint returns a 402 challenge requiring an X-PAYMENT header with an exact payment of 20,000 base units of USDC (0.02 USD) per call. No API keys or rate limits are required — access is gated purely by micropayment.
The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data & analytics (metrics, reports, data export, insights), AI & ML (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 listed at $0.02 per request and settle on the Base network using USDC.
The specific endpoint being listed here (`/api/v1/lab/results/73`) is not explicitly described on the landing page among the advertised API categories, so its exact response payload is unclear. The x402 challenge confirms it is live, accepts POST, and returns `application/json`. No OpenAPI schema, detailed documentation, or example responses were found in the crawl.
Capabilities
Use cases
- —Retrieving lab result data for resource ID 73 via a single micropayment
- —Programmatic access to paid data endpoints without managing API keys or subscriptions
- —Agent-driven data retrieval where per-call USDC payment replaces traditional auth
Fit
Best for
- —Agents or scripts that need one-off paid data access without signup
- —Developers exploring x402 micropayment patterns on Base
- —Use cases where pay-per-request is preferable to subscription billing
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —Bulk data retrieval where per-call pricing would be cost-inefficient
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/73 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation for this specific resource, no example request/response payloads, and the purpose of '/api/v1/lab/results/73' is not explained anywhere in the crawled material. Effectively a stub listing.
Warnings
- —The specific endpoint /api/v1/lab/results/73 is not listed among the advertised APIs on the landing page — its purpose and response schema are unknown.
- —No OpenAPI spec, README, or detailed docs were found; /pricing and /README pages returned only a 'Connect wallet' prompt.
- —Response payload structure is entirely unknown — no outputSchema fields beyond the HTTP method were provided.
Citations
- —The endpoint returns a 402 challenge requiring 20,000 base units of USDC (asset 0x8335…) on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/73
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform advertises APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com