Ally Invest API (Legacy / Retired)
The legacy Ally Invest brokerage REST API, inherited from Ally's 2016 acquisition of TradeKing. It offered OAuth 1.0a authenticated access (consumer key/secret plus OAuth token/secret) over documented resource groups - Accounts (balances, history, holdings), Orders/Trading (preview and submit via FIXML), Market data (quotes, clock, timesales, toplists, options chains, news), Member profile, Watchlists, and Utility status - returning JSON or XML. Ally Invest has since pivoted to managed and robo portfolios; the developer registration and documentation pages now resolve to marketing content, so this API is treated as retired and is listed humanURL-only. No downloadable OpenAPI/Swagger is published by Ally.