Building a custom GPT or Claude agent for marketing reporting

Description and use

<h2> TL;DR </h2> <p>A marketing reporting agent should read approved data sources, answer fixed weekly questions, and never invent numbers. On ChatGPT you build that with Custom GPT instructions, optional knowledge files and Actions that call your API. (<a href="https://developers.openai.com/api/docs/actions/introduction" rel="noopener noreferrer">OpenAI GPT Actions</a>) On Claude you connect tools through MCP connectors and keep the workflow in a Project so the same rules stick. (<a href="https://claude.com/docs/extend/overview" rel="noopener noreferrer">Claude connectors overview</a>) Start

Problem

<h2> TL;DR </h2> <p>A marketing reporting agent should read approved data sources, answer fixed weekly questions, and never invent numbers. On ChatGPT you build that with Custom GPT instructions, optional knowledge files and Actions that call your API. (<a href="https://developers.openai.com/api/docs/actions/introduction" rel="noopener noreferrer">OpenAI GPT Actions</a>) On Claude you connect tools through MCP connectors and keep the workflow in a Project so the same rules stick. (<a href="https://claude.com/docs/extend/overview" rel="noopener noreferrer">Claude connectors overview</a>) Start

Outcome

<h2> TL;DR </h2> <p>A marketing reporting agent should read approved data sources, answer fixed weekly questions, and never invent numbers. On ChatGPT you build that with Custom GPT instructions, optional knowledge files and Actions that call your API. (<a href="https://developers.openai.com/api/docs/actions/introduction" rel="noopener noreferrer">OpenAI GPT Actions</a>) On Claude you connect tools through MCP connectors and keep the workflow in a Project so the same rules stick. (<a href="https://claude.com/docs/extend/overview" rel="noopener noreferrer">Claude connectors overview</a>) Start

Evidence

Building a custom GPT or Claude agent for marketing reporting

Source