ChatGPT Setup¶

ChatGPT supports remote MCP servers through Developer Mode. Available for Pro, Plus, Team, Enterprise, and Edu plans.

Setup Steps¶

1. Open chatgpt.com and sign in
2. Go to Settings (gear icon)
3. Navigate to Apps > Advanced > Developer Mode and enable it
4. Go back to Apps and click Add new connector
5. Fill in:
6. Name: FinPlan
7. MCP Server URL: https://mcp.finplan.prethink.io/mcp
8. Click Create

Verification¶

1. Start a new chat
2. Click the Apps button in the message composer
3. Select FinPlan from the list
4. Try: Calculate federal income tax for $85,000 filing single in 2025

Things to Know¶

• Developer Mode is a beta feature. Memory is disabled while it's active.
• ChatGPT will ask you to confirm before running any tool that writes or modifies data.
• You need to enable the FinPlan app in each new chat session.

References¶

• OpenAI: Developer Mode and MCP connectors in ChatGPT
• OpenAI: Building MCP servers for ChatGPT

Sometimes agents need to be told to use tools. Making sure it knows about them often helps.

```
user> 'Do you have access to FinPlan tools for financial planning?'
agent> (inspecting) 'Yes, I do'.
```