How do I install corresync?

Its own README gives this command: corr mail search --all-accounts --query 'subject:"Quarterly plan"' --limit 3. Run it where your MCP client can launch the server, and check the README for any settings it asks for.

Is corresync official and is it maintained?

We found nothing naming it as a vendor’s official server. Its repository has 2 GitHub stars and its state in our directory is listed. Its last commit we recorded was on 2026-10-22.

What licence does corresync use?

The repository declares the Apache-2.0 licence.

InfratoApp / Resources / MCP servers / corresync

corresync

corresync is an MCP server, listed under communication. It reaches gmail. Its repository has 2 GitHub stars and is licensed under Apache-2.0; we last read it on 2026-10-22.

corresync syncs email and calendars to and from Outlook, Gmail, Microsoft 365, JMAP, IMAP/SMTP, and CalDAV. It requires no hosted relay and offers preview-before-commit functionality.

Install

Read from corresync’s own README, close to verbatim -- not written by us, and not guessed.

corr mail search --all-accounts --query 'subject:"Quarterly plan"' --limit 3

View in corresync’s own README ↗

What it reaches, and what it needs

Reaches

gmail

Credential

○ none found

Maintenance

Stars

State

listed

Licence

Apache-2.0

From the repository

Local-first MCP server and CLI for email and calendars across Outlook, Gmail, Microsoft 365, JMAP, IMAP/SMTP, and CalDAV. Preview-before-commit writes; no hosted relay.

View on GitHub ↗2026-10-22

corresync compared with similar servers

corresync compared with the closest alternatives, by services reached, credentials, stars, last update and licence
Server	Reaches	Needs	Stars	Last update	Licence
corresync (this page)	gmail	None listed	2	2026-10-22	Apache-2.0
google-workspace-mcp	gmail, google(1 shared)	GOOGLE_CLIENT_SECRET	192	2026-10-21	Apache-2.0
mail-mcp	gmail, mail(1 shared)	MAIL_OAUTH2_DEFAULT_CLIENT_SECRET, MAIL_OAUTH2_DEFAULT_REFRESH_TOKEN, MAIL_OAUTH2_WORK_CLIENT_SECRET, MAIL_OAUTH2_WORK_REFRESH_TOKEN	108	2026-10-23	MIT
mcp-server-email	gmail(1 shared)	None listed	81	2025-04-27	MIT
mcp-headless-gmail	gmail(1 shared)	None listed	55	2025-05-24	MIT
mail-use	gmail(1 shared)	None listed	47	2026-10-13	MIT

Ranked by services in common with corresync, then by stars. Figures are from each repository when we last read it.

Common questions about corresync

What does corresync do?: corresync syncs email and calendars to and from Outlook, Gmail, Microsoft 365, JMAP, IMAP/SMTP, and CalDAV. It requires no hosted relay and offers preview-before-commit functionality.
How do I install corresync?: Its own README gives this command: corr mail search --all-accounts --query 'subject:"Quarterly plan"' --limit 3. Run it where your MCP client can launch the server, and check the README for any settings it asks for.
What does corresync connect to, and what does it need?: It reaches gmail.
Is corresync official and is it maintained?: We found nothing naming it as a vendor’s official server. Its repository has 2 GitHub stars and its state in our directory is listed. Its last commit we recorded was on 2026-10-22.
What licence does corresync use?: The repository declares the Apache-2.0 licence.

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