Historical stock data for UNH via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides historical stock price data for UnitedHealth Group (ticker: UNH) through the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs covering finance, AI/ML, data analytics, and infrastructure utilities. The endpoint is accessed via HTTP POST and is gated by the x402 payment protocol, settling in USDC on the Base network.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each call is paid individually via the X-PAYMENT header. The x402 challenge was confirmed live, returning a proper 402 response with payment parameters including the USDC contract address on Base (0x8335…2913) and a 300-second payment timeout.
The provider hosts many similar endpoints across categories like finance (price feeds, exchange rates, crypto quotes), AI (sentiment analysis, summarization, classification, embeddings), data analytics, and infrastructure utilities — all at the same $0.02/request price point. However, documentation beyond the landing page is extremely sparse: the /docs, /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no further technical detail. No request/response schema, field descriptions, or example payloads are documented, so the exact shape of the historical stock data returned is unknown.
Capabilities
Use cases
- —Retrieving historical price data for UNH to feed into financial models or backtesting
- —Agents autonomously purchasing stock history data without pre-provisioned API keys
- —Building dashboards or reports that include UnitedHealth Group historical performance
Fit
Best for
- —AI agents needing on-demand stock history without subscription overhead
- —Developers prototyping financial tools who want instant access with no signup
- —Micropayment-native workflows on Base that need equity data
Not for
- —Bulk historical data downloads across many tickers (only UNH endpoint documented)
- —Real-time streaming stock quotes or sub-second latency trading applications
- —Users who need detailed API documentation or guaranteed SLAs before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/UNH/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no documented request or response schema, no examples, and all documentation pages beyond the landing page are empty stubs. The actual data format returned is entirely unknown.
Warnings
- —No request or response schema documented — the shape of historical stock data is unknown
- —All documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no content
- —Only the UNH ticker endpoint was probed; it is unclear whether other tickers are available at similar paths
- —No OpenAPI spec or AI plugin manifest found
Citations
- —Endpoint returns a valid x402 402 challenge with USDC on Base networkhttps://lowpaymentfee.com/api/v1/stocks/UNH/history
- —Price is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stocks/UNH/history
- —maxAmountRequired is 20000 base units (= $0.02 with 6 decimals)https://lowpaymentfee.com/api/v1/stocks/UNH/history