Question : Which Claude or ChatGPT plan do I need to connect Mailpro?

• Claude: the free plan allows one custom connector; paid plans allow more.
• ChatGPT: custom MCP apps go through developer mode; according to OpenAI, Business, Enterprise and Edu, with other plans at different times. Check yours in the Apps settings.

On the Mailpro side, the assistant's sends use your usual credits: the details. For an AI with no subscription, see self-hosted AI.