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 87) 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/87` is listed under the title "Premium API Access" but its exact data payload is undocumented. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires a payment of up to 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 USD (USDC uses 6 decimals). Payment is made via the x402 exact scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through per-call micropayment.
The broader lowpaymentfee.com platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more — all at the same $0.02 price point. However, this specific listing covers only the `/api/v1/lab/results/87` resource. Documentation is minimal: the site's /api, /pricing, and /README pages all resolve to a "Connect wallet" prompt with no further detail, and no OpenAPI spec or response schema is available.
Capabilities
Use cases
- —Retrieving lab result data for record ID 87 via a single micropayment
- —Demonstrating x402 pay-per-call integration on Base
- —Agent-driven data retrieval without API key management
Fit
Best for
- —Developers experimenting with x402 micropayment protocols
- —AI agents that need keyless, pay-per-call data access
- —Users who want to avoid subscription commitments for occasional API calls
Not for
- —Users needing detailed documentation or response schema before integrating
- —Bulk data retrieval where per-call pricing becomes expensive at scale
- —Anyone requiring non-USDC or non-Base-network payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/lab/results/87 \
-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 documentation on what the response payload contains, no OpenAPI spec, no example requests or responses, and the specific resource path (/api/v1/lab/results/87) is not listed on the site's landing page. The 'lab results' category is not mentioned anywhere in the crawled content, making the actual purpose unclear.
Warnings
- —No documentation available for this specific endpoint — /api, /pricing, and /README all return only a 'Connect wallet' prompt
- —The resource path /api/v1/lab/results/87 does not appear in the site's listed API catalog, making its purpose unclear
- —No response schema or example output is provided; the actual data returned is unknown
- —The term 'lab results' could imply medical/health data, which may carry regulatory implications (HIPAA, etc.) — but there is no evidence this is medical data
Citations
- —The x402 challenge confirms the endpoint is live, accepts POST, and requires up to 20,000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/lab/results/87
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/lab/results/87
- —The /api, /pricing, and /README pages resolve only to a 'Connect wallet' prompt with no further documentationhttps://lowpaymentfee.com/api