Option Chain API - Finnworlds

The Option Chain API delivers structured option chain data for listed equity securities. By a publicly traded ticker, you can get option chain data on all call and out contracts of the ticker, including their expirations, strike prices, call and put legs, last traded timestamps, bid/ask, last price, volume, and open interest.

The REST structure of the Option Chain API simplifies integration and allows you to build platforms where your users can track all options for the tickers they are interested in, without putting a heavy load on you on the data engineering side. Option chain data is ideal for options analytics, derivatives desks, trading UIs, risk systems, and quantitative research that require up-to-date option market structure.

The API is suitable for fintech developers, algo traders, brokers, and enterprise applications that need programmatic access to options market data.

Common Use Cases

– Display full option chains with expirations and strikes on trading UIs
– Power options screeners (moneyness, expiry, IV overlays) for traders and analysts
– Monitor volume and open interest to identify liquidity and unusual activity
– Feed risk and margin systems with up-to-date option quotes and timestamps
– Backtest option strategies using historical chain snapshots (when available)

API Features

• Calls & Puts – Separate call and put legs with full contract identifiers
• Expiration & Strike Coverage – Multiple expirations and strike levels per ticker
• Quote Details – Last price, bid, ask, and last traded timestamp for each contract
• Market Activity – Volume and open interest fields to measure liquidity and flow
• Chain-Level Output – Returns a structured chain grouped by expiration with date/timestamp metadata

Access today by getting your API key on the Finnworlds website.
Looking for academic or non-profit use? Send us an email to start the conversation.

How to access the data

• JSON REST API
• Excel CSV download
• PDF reports
• Email link

Documentation

Our documentation includes input parameters and output objects with descriptions. We also have SDKs for Javascript, JQuery, VueJS, Angular, JAVA, PHP, NodeJS, Python, Go, Ruby, C#, R, Strest, Rust, Swift and Scala.

Examples

https://api.finnworlds.com/api/v1/optionchain?key=APIKEY&ticker=AAPL

{
    "status": {
        "code": 200,
        "message": "OK",
        "details": ""
    },
    "result": {
        "ticker": "AAPL",
        "options": [
            {
                "expiration_date": "2025-08-29",
                "date": "2025-08-27 13:25:47",
                "call": [
                    {
                        "contract": "AAPL250829C00110000",
                        "last_traded": "2025-08-27 12:58:03",
                        "strike": "110",
                        "last_price": "119.42",
                        "bid": "0",
                        "ask": "0",
                        "volume": "3",
                        "open_interest": "7"
                    }
                ]
            },
            {
                "expiration_date": "2025-08-29",
                "date": "2025-08-27 13:25:47",
                "put": [
                    {
                        "contract": "AAPL250829P00325000",
                        "last_traded": "2025-08-27 12:45:19",
                        "strike": "325",
                        "last_price": "94.15",
                        "bid": "0",
                        "ask": "0",
                        "volume": "5",
                        "open_interest": "0"
                    }
                ]
            }
        ]
    }
}

Customer Support

Need help, have questions? Get in touch with Support.

Legal

Use of the Finnworlds website, services like API and database are subject to the Finnworlds Terms & Conditions.