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 results resource (`/api/v1/lab/results/88`) behind an x402 paywall. 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 accepts POST requests and returns `application/json` responses.
The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data & analytics, AI & machine learning (sentiment analysis, 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 with no API keys, no rate limits, and no minimum commitments required.
This specific endpoint (`/api/v1/lab/results/88`) is labeled "Premium API Access" but its exact data payload is not documented. It does not appear in the main landing page's catalog of available APIs, so its purpose and response schema are unclear. The x402 challenge is live and well-formed, confirming the endpoint is operational and ready to accept payments. No OpenAPI spec, detailed documentation, or example responses are available for this resource.
Capabilities
Use cases
- —Retrieving lab result data (resource ID 88) via a single micropayment
- —Demonstrating x402 payment protocol integration on Base
- —Agent-driven data retrieval with per-call USDC settlement
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents that need pay-per-call data access without API key management
- —Low-cost one-off data retrieval on Base network
Not for
- —Users needing documented, well-specified response schemas before integrating
- —High-volume batch retrieval where per-call payments add friction
- —Anyone requiring lab results from a different resource ID or customizable queries
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/88 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint is operational. However, there is no documentation for this specific resource, no OpenAPI spec, no example request/response, and the endpoint does not appear in the provider's own catalog. The purpose of 'lab/results/88' is entirely opaque.
Warnings
- —Endpoint /api/v1/lab/results/88 is not listed in the provider's public API catalog — its purpose and response format are unknown.
- —No OpenAPI specification or response schema is available.
- —No example responses or detailed documentation exist for this resource.
- —The label 'Premium API Access' is generic and does not describe the actual data returned.
Citations
- —The x402 challenge returns maxAmountRequired of 20,000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/88
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/lab/results/88
- —All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com