Question
Can ChatGPT read FanDuel props?
Short answerYes. Build a custom GPT with an Action imported from https://fanduelapi.com/openapi-chatgpt.json and your key as a Bearer API key, or add https://fanduelapi.com/api/mcp as a connector without a key for the docs search and a delayed sample.
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In more detail
ChatGPT connectors cannot hold a static key, which is why the keyless tools exist; the full data goes through the Action.