Ballast for ChatGPT

io.github.useballast/ballast-mcp

Cold email outreach: manage campaigns, lead sequences, mailbox warmup, and unified inbox replies.

client:ChatGPT transport:streamable-http

Install Ballast in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://ballast.to/api/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs