Pay-per-call lab results endpoint on Base via x402, settling in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides premium API access to lab results data (specifically resource ID 30) via the x402 payment protocol. It accepts POST requests and returns JSON responses. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).
The endpoint is part of a broader platform (lowpaymentfee.com) that offers multiple pay-per-call API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all priced at $0.02 per request. The platform advertises no API keys, no rate limits, and instant access. However, the specific "/api/v1/lab/results/30" path is not listed on the provider's homepage among the documented endpoints, so its exact data content and response schema are unclear.
The x402 challenge was successfully captured (HTTP 402 with valid accepts payload), confirming the endpoint is live. No OpenAPI spec, detailed documentation, or example responses were found in the crawl. The output schema indicates it is an HTTP POST endpoint marked as discoverable. Without further documentation, the exact fields returned in the response body remain unknown.
Capabilities
Use cases
- —Retrieving lab results data on-demand with per-call USDC micropayments
- —Integrating pay-as-you-go data access into agent workflows without API keys
- —Programmatic access to premium data behind x402 payment gates
Fit
Best for
- —Agents or services that need keyless, pay-per-call data access
- —Developers experimenting with x402 payment protocol on Base
- —Use cases requiring low-friction micropayment-gated API calls
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume batch processing where per-call pricing may add up
- —Users without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/30 \
-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 OpenAPI spec, no documentation for this specific path, no example request/response, and the "/lab/results/30" resource is not listed among the provider's documented endpoints. Effectively a stub with confirmed liveness.
Warnings
- —The path /api/v1/lab/results/30 is not listed among the provider's documented endpoints on the homepage — its data content is unknown.
- —No OpenAPI spec, response schema, or example responses are available.
- —No detailed documentation was found; /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt.
- —The exact meaning of 'lab results' and what resource ID 30 represents is undocumented.
Citations
- —The endpoint returns HTTP 402 with an x402 challenge advertising USDC on Base at maxAmountRequired 20000 (=$0.02)https://lowpaymentfee.com/api/v1/lab/results/30
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/lab/results/30