Connecting ChatGPT to Live Amazon Data via MCP: Setup, Plan Requirements, and Verification

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ChatGPT has supported MCP clients since DevDay 2025, but users on Free or Go plans may not see the setup option because Developer Mode, which hosts custom connectors, is limited to paid plans. The guide walks through enabling Developer Mode and adding an Amazon data connector with an authentication token. It includes a Python pre-flight script that checks the endpoint, session handling, and tool availability before connecting. A three-prompt protocol is provided to confirm that ChatGPT's answers are grounded in the returned data, using reference figures from a sample run.

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