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ChatGPT connects to third-party apps and plugins on Free, Plus, Pro, Business, Enterprise, and Edu; Free includes directory plugins/interactive apps, while workspace admins gate Business/Enterprise/Edu connectors.

Claude supports remote connectors across its major surfaces and local desktop extensions on Claude Desktop and Claude Code.

Perplexity offers app, file, and custom remote connectors on Pro, Max, Enterprise Pro, and Enterprise Max, with enterprise admin controls for org-wide connector policy.

Codex connects to external systems through configured MCP servers and other available tools.

Claude Code can use remote connectors and local desktop extensions through Anthropic’s connector architecture.

Cursor’s MCP directory provides connectors for services including GitHub, Linear, Notion, Figma, and databases.

GitHub Copilot can connect to external services through configured MCP servers and organization-approved registries.

Gemini Code Assist can connect to external services through MCP servers and RESTful API tools in agent mode.

Cascade connects to third-party systems through MCP servers, with additional enterprise controls.

Replit Agent can configure application integrations, but this review did not verify general MCP-client support.