MCP Comparison · 2026

Common Room vs Dex MCP Server

Comparing Common Room and Dex as MCP servers? Common Room (chatgpt app) is best when conversational access to common room inside chatgpt. Dex (chatgpt app) is best when conversational access to dex inside chatgpt. Both run as Model Context Protocol servers and can coexist in the same client. Updated 2026.

Side-by-side specs

Pulled from each MCP's verified fact sheet.

 Common RoomDex
Primary functionChatGPT AppChatGPT App
MaintainerCommon RoomDex
PricingFreeFree
Setup complexityLow · ~< 1 minLow · ~< 1 min
TransportStreamable HTTPStreamable HTTP
Auth modelOAuth 2.1OAuth 2.1
LicenseProprietaryProprietary
Language
Latest version
Compatible clientsChatGPTChatGPT
Last verified2026-04-302026-04-30

Which one should you pick?

Decision rubric drawn from each MCP's documented strengths.

Choose Common Room

  • Conversational access to Common Room inside ChatGPT
  • In-chat workflows that benefit from rich UI widgets
  • One-click OAuth on Free / Go / Plus / Pro plans
See full Common Room write-up →

Choose Dex

  • Conversational access to Dex inside ChatGPT
  • In-chat workflows that benefit from rich UI widgets
  • One-click OAuth on Free / Go / Plus / Pro plans
See full Dex write-up →

Pick something else if…

  • Use outside ChatGPT

Feature breakdown

Key capabilities each server ships out of the box.

Common Room

  • Listed in the official ChatGPT Apps directory
  • One-click OAuth — no JSON config, no install command
  • Available to logged-in ChatGPT users on supported plans
  • Built on the OpenAI Apps SDK (MCP under the hood)
  • Reviewed and approved by OpenAI before publication

Dex

  • Listed in the official ChatGPT Apps directory
  • One-click OAuth — no JSON config, no install command
  • Available to logged-in ChatGPT users on supported plans
  • Built on the OpenAI Apps SDK (MCP under the hood)
  • Reviewed and approved by OpenAI before publication

Install snippets

Open the detail page for ready-to-paste config for every major client.

FAQ

Common Room vs Dex: which MCP server should I use?

Pick Common Room when conversational access to common room inside chatgpt. Pick Dex when conversational access to dex inside chatgpt. Common Room is built for chatgpt app, while Dex focuses on chatgpt app.

Can I run both Common Room and Dex together?

Yes. MCP clients run each server as a separate process and surface every server's tools simultaneously, so you can install both and let your agent decide which to call. Be deliberate with auth scopes when stacking servers.

How fresh is this comparison?

Updated for 2026. Common Room's last verification: 2026-04-30. Dex's last verification: 2026-04-30. We refresh detail-page facts on every catalog rebuild.

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