Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource `/api/v1/lab/results/17` appears to be part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.
The x402 challenge for this endpoint advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which uses 6 decimals), equaling $0.02 per call. Payment is made via the `exact` scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.
The specific purpose of `/api/v1/lab/results/17` is not documented on the landing page — it does not appear in the listed API catalog, which focuses on analytics, AI, finance, and utility endpoints. The "lab" path segment suggests it may be an experimental or test endpoint. Without further documentation or an OpenAPI spec, the exact request body format and response schema are unknown. The broader platform advertises no API keys, no rate limits, and instant access.
Capabilities
Use cases
- —Accessing premium data or lab results behind a per-call USDC paywall
- —Integrating pay-per-use API calls into agent workflows without API key management
- —Testing x402 payment protocol integrations on Base
Fit
Best for
- —Developers experimenting with x402 micropayment-gated APIs
- —Agents that need keyless, pay-per-call access to data endpoints
- —Projects wanting low-friction USDC-settled API consumption on Base
Not for
- —Users needing well-documented, production-grade APIs with full OpenAPI specs
- —High-volume use cases where per-call pricing at $0.02 adds up significantly
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/17 \
-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 OpenAPI spec, no documentation for this specific resource path, no request/response schema, and the /lab/results/17 path does not appear in the site's listed API catalog. Effectively a stub with minimal inferrable detail.
Warnings
- —The path /api/v1/lab/results/17 is not listed in the provider's public API catalog — it may be experimental or undocumented.
- —No OpenAPI spec, request body schema, or response schema is available.
- —The /pricing, /api, and /README pages returned only a 'Connect wallet' prompt with no useful documentation.
- —The exact nature of 'lab results' is unknown — could be test/demo data.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02 per call.https://lowpaymentfee.com/api/v1/lab/results/17
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The site lists API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.https://lowpaymentfee.com