You need the OkText app on your Android phone first. Download it.
Open ChatGPT PluginsIf OkText isn't listed yet and your ChatGPT plan lets you add custom MCP servers: in Plugins select + →
Add custom MCP server, use https://api.oktext.app/mcp, and sign in the same way.
You can disconnect at any time in OkText → Settings, or in ChatGPT's plugin settings.