Pay-per-call stock market quote for UNH via x402 on Base (USDC).
What it does
This endpoint at lowpaymentfee.com provides a market quote for UNH (UnitedHealth Group) via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which spans data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments.
The specific endpoint `/api/v1/market/quote/UNH` accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02 per call — consistent with the site's stated flat pricing.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but the exact shape of the response data (e.g., bid/ask, last price, volume) is unknown and must be inferred from the endpoint path alone.
Capabilities
Use cases
- —Fetching a real-time or recent market quote for UNH (UnitedHealth Group)
- —Agent-driven portfolio monitoring that needs on-demand equity quotes
- —Programmatic trading bots that require per-call market data without subscriptions
- —Integrating stock price lookups into AI agent workflows via x402 micropayments
Fit
Best for
- —AI agents needing on-demand stock quotes without API key management
- —Low-volume or sporadic equity data lookups at $0.02 per call
- —Developers prototyping finance apps who want instant access with no signup
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data
- —Users needing historical OHLCV data or full order-book depth (not evidenced)
- —Anyone requiring detailed documentation or guaranteed SLAs before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/market/quote/UNH \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live with a valid x402 challenge and consistent pricing ($0.02). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no example payloads. The actual data returned is entirely unknown.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI or JSON schema for request or response; response structure is completely unknown
- —The endpoint path suggests a stock quote for ticker UNH, but this is inferred from the URL only
- —No information on data source, freshness, or accuracy of the market quote
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/market/quote/UNH
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/market/quote/UNH