Amplify Integration - Stock API

A stock quote and watch list API based on Finnhub created in Amplify Integration.

The project exposes two end points

• GET /quote?symbol=AAPL
• GET /watchlist?symbols=AAPL,INTC,TXN,NVDA,AMZN,MSFT

The quote API is basically a pass through of the Finnhub Stock quote API with a field mapped payload. It takes a single symbol as a query parameter. The watchlist API returns an array of stock quotes suitable for a watch list. It takes a comma separated list of symbols.

The project is intended to be a simple example of how to expose API endpoints and map and aggregate data in Amplify Integration using three method:

• HTTP Server - contractless
• HTTP Server - contractless using a common service
• API Server - using OAS Doc as starting point and leveraginG same common service

The OpenAPI 3.0 doc is provided in this reposiroty as well

Quote

GET /quote?symbol=AAPL

200 response:

{
    "Quote": {
        "OpenPrice": 236.18,
        "DayHigh": 236.18,
        "DayLow": 234.01,
        "Price": 235,
        "Change": 2.85,
        "ChangePercent": 1.2277,
        "Name": "Apple Inc",
        "Symbol": "AAPL"
    }
}

Returns 204 on bad symbol, 400 on missing query parameter and 500 on Finnhub API call error, all with the following schema:

{
    "message": "Missing symbol"
}

Watchlist

• GET /watchlist?symbols=AAPL,INTC,TXN,NVDA,AMZN,MSFT

200 response:

{
    "Watchlist": [
        {
            "Price": 235,
            "Change": 2.85,
            "ChangePercent": 1.2277,
            "Symbol": "AAPL",
            "Name": "Apple Inc"
        },
        {
            "Price": 198.47,
            "Change": 0.17,
            "ChangePercent": 0.0857,
            "Symbol": "TXN",
            "Name": "Texas Instruments Inc"
        },
        {
            "Price": 22.77,
            "Change": 0.33,
            "ChangePercent": 1.4706,
            "Symbol": "INTC",
            "Name": "Intel Corp"
        }
    ]
}

Bad symbols will not be added to array response Returns 204 if all symbols are bad Returns 500 on Finnhub API call error All with folowing schema:

{
    "message": "Missing symbols"
}

Installation

• Import the StockQuoteFH.zip project into Amplify Integration
• Edit the Finnhub connector and enter your API Key
  • You can get an API Key here
• Enable your HTTP Server integrations and/or API
• Call your APIs