Pay-per-call lab results endpoint on Base via x402 — $0.02 per request in USDC.
What it does
This x402-enabled endpoint at `/api/v1/lab/results/62` 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 (USD Coin) at a cost of $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 `/api/v1/lab/results/62` is listed under the generic title "Premium API Access." The crawled site does not provide documentation for this particular path, so its exact response payload is unclear. It may return lab-related result data keyed to ID 62, but no schema or sample response is documented. The endpoint is confirmed live: it returns a proper 402 challenge with x402 version 1, accepting USDC on Base with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals).
The broader lowpaymentfee.com platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and data export — all at the same $0.02 price point. No OpenAPI spec, detailed documentation, or example responses were found during the crawl; the /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no substantive content.
Capabilities
Use cases
- —Retrieving lab result data on-demand with per-call USDC micropayments
- —Integrating pay-per-use data endpoints into agent workflows without API key management
- —Accessing premium data behind x402 payment gates on the Base L2 network
Fit
Best for
- —Agents or applications that need keyless, pay-per-call API access
- —Developers experimenting with x402 payment protocol integrations
- —Use cases requiring low-friction micropayments ($0.02) on Base
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume batch processing where per-call fees would accumulate significantly
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/62 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation for this specific path, no example request/response, and the crawled pages beyond the homepage returned no useful content. The purpose of '/lab/results/62' is unclear.
Warnings
- —No documentation exists for the /api/v1/lab/results/62 endpoint — its purpose and response schema are unknown.
- —The /api, /pricing, and /README pages returned only 'Connect wallet' with no substantive content.
- —No OpenAPI specification or schema is available for any endpoint on this platform.
- —The endpoint path suggests a fixed resource ID (62); it is unclear whether other IDs are available or what 'lab results' refers to.
Citations
- —The endpoint returns a 402 challenge with x402 version 1, accepting USDC on Base with maxAmountRequired of 20000 base units.https://lowpaymentfee.com/api/v1/lab/results/62
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/lab/results/62
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.https://lowpaymentfee.com