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 Room | Dex | |
|---|---|---|
| Primary function | ChatGPT App | ChatGPT App |
| Maintainer | Common Room | Dex |
| Pricing | Free | Free |
| Setup complexity | Low · ~< 1 min | Low · ~< 1 min |
| Transport | Streamable HTTP | Streamable HTTP |
| Auth model | OAuth 2.1 | OAuth 2.1 |
| License | Proprietary | Proprietary |
| Language | — | — |
| Latest version | — | — |
| Compatible clients | ChatGPT | ChatGPT |
| Last verified | 2026-04-30 | 2026-04-30 |
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
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
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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