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 77) behind an x402 paywall. It accepts POST requests and returns JSON. 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 broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text 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.
This specific endpoint (/api/v1/lab/results/77) is not listed on the homepage's catalog, so its exact purpose is unclear — the title "Premium API Access" is generic. No OpenAPI schema, request body documentation, or example responses were found in the crawl. The endpoint is confirmed live via a valid x402 402 challenge.
Capabilities
Use cases
- —Retrieving lab result data (ID 77) 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 flows
- —Agents that need pay-per-call data access without API keys
- —Low-cost one-off data retrieval settled on Base
Not for
- —Bulk data retrieval requiring thousands of calls (no batch endpoint documented)
- —Users who need detailed documentation or OpenAPI specs before integrating
- —Anyone seeking a well-documented, production-grade lab information system
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/77 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no request/response examples, and no documentation for what /api/v1/lab/results/77 actually returns. The endpoint is not even listed on the provider's own homepage catalog. Effectively a stub with confirmed liveness.
Warnings
- —Endpoint /api/v1/lab/results/77 is not listed in the provider's own homepage API catalog — purpose is unclear
- —No OpenAPI spec, request body schema, or response examples available
- —Description 'Premium API Access' is generic and uninformative
- —Crawled /api, /pricing, and /README pages returned only 'Connect wallet' with no useful content
Citations
- —The x402 challenge returns maxAmountRequired of 20,000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/lab/results/77
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/lab/results/77
- —All listed endpoints 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