Pay-per-call lab results endpoint on Base via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides access to a specific lab result resource (ID 92) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.
The specific resource at `/api/v1/lab/results/92` is listed under the title "Premium API Access" but the crawled site does not enumerate a "lab" category or explain what data this particular endpoint returns. The platform's homepage advertises categories like Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure, but lab results are not among them. It is possible this is a test or demonstration endpoint.
Payment is handled via the x402 protocol: callers receive a 402 challenge specifying USDC (contract `0x8335…2913`) on Base with a `maxAmountRequired` of 20000 base units, which equals $0.02 (USDC uses 6 decimals). No API keys or rate limits are advertised. The endpoint accepts POST requests and returns `application/json`. No OpenAPI schema, request body schema, or response schema is documented beyond the x402 challenge metadata.
Capabilities
Use cases
- —Retrieving lab result data (ID 92) via a single paid API call
- —Demonstrating x402 payment flow for agent-to-API micropayments
- —Integrating pay-per-request data access without API key management
Fit
Best for
- —Developers experimenting with x402 payment protocol on Base
- —Agents that need keyless, pay-per-call API access
- —Testing micropayment-gated data retrieval workflows
Not for
- —Production use cases requiring documented request/response schemas
- —Bulk data retrieval where per-call pricing is inefficient
- —Users who need to understand what 'lab results' data actually contains before paying
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/92 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what this specific endpoint returns, no request/response schema, and the 'lab/results/92' path is not listed anywhere on the provider's site. Effectively a stub with working payment infrastructure but unknown utility.
Warnings
- —The endpoint path /api/v1/lab/results/92 is not listed on the provider's homepage among available APIs — it may be a test or unlisted resource.
- —No request body schema or response schema is documented; callers cannot know what to send or what they will receive.
- —No OpenAPI spec, README, or detailed documentation was found (crawled pages returned only 'Connect wallet').
- —The nature of 'lab results' data is completely undocumented.
Citations
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and settlement on Base network.https://lowpaymentfee.com
- —The x402 challenge specifies USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base with maxAmountRequired of 20000 base units ($0.02).https://lowpaymentfee.com/api/v1/lab/results/92
- —Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.https://lowpaymentfee.com