MCP Comparison · 2026
Outlook Calendar vs Outlook Email MCP Server
Comparing Outlook Calendar and Outlook Email as MCP servers? Outlook Calendar (chatgpt app) is best when conversational access to outlook calendar inside chatgpt. Outlook Email (chatgpt app) is best when conversational access to outlook email 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.
| Outlook Calendar | Outlook Email | |
|---|---|---|
| Primary function | ChatGPT App | ChatGPT App |
| Maintainer | Outlook Calendar | Outlook Email |
| 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 Outlook Calendar
- Conversational access to Outlook Calendar inside ChatGPT
- In-chat workflows that benefit from rich UI widgets
- One-click OAuth on Free / Go / Plus / Pro plans
Choose Outlook Email
- Conversational access to Outlook Email 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.
Outlook Calendar
- 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
Outlook Email
- 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
Outlook Calendar vs Outlook Email: which MCP server should I use?
Pick Outlook Calendar when conversational access to outlook calendar inside chatgpt. Pick Outlook Email when conversational access to outlook email inside chatgpt. Outlook Calendar is built for chatgpt app, while Outlook Email focuses on chatgpt app.
Can I run both Outlook Calendar and Outlook Email 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. Outlook Calendar's last verification: 2026-04-30. Outlook Email's last verification: 2026-04-30. We refresh detail-page facts on every catalog rebuild.
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