SyncSignature Email Signatures

Manage your company's email signatures from an AI assistant: add teammates, assign templates by group, control banner campaigns and check signature click analytics. Works with Google Workspace and Microsoft 365. Hosted, OAuth sign-in, no API key.

GitHub

Hosted MCP Server

npx add-mcp 'https://mcp.syncsignature.com/mcp'

Installs into Claude Code, Codex, Cursor and more

Documentation

SyncSignature: email signature management for teams, from any AI assistant.

SyncSignature Email Signatures (MCP server)

SyncSignature does not route or read your email. You can connect with read-only access.


Server URL	`https://mcp.syncsignature.com/mcp`
Transport	Streamable HTTP
Authentication	OAuth (sign in with your SyncSignature account, no API key)
Registry name	`com.syncsignature/email-signatures`
Docs	https://syncsignature.com/docs/connect-ai-assistant-mcp/

This repository holds the connection manifests and the agent skill. The server itself is hosted by SyncSignature; there is nothing to run locally.

Install

Claude (web, desktop, mobile, Cowork): open claude.ai/directory/syncsignature and click Connect.

Claude Code:

claude mcp add --transport http syncsignature https://mcp.syncsignature.com/mcp

Then run /mcp to sign in. Or install the plugin (server plus skill):

/plugin marketplace add SyncSignature/mcp
/plugin install syncsignature@syncsignature

ChatGPT: install SyncSignature from the ChatGPT plugin directory.
Cursor and Grok Bot: install SyncSignature from the Cursor Marketplace, or add to .cursor/mcp.json:
```
{ "mcpServers": { "syncsignature": { "url": "https://mcp.syncsignature.com/mcp" } } }
```

Gemini CLI:

gemini extensions install https://github.com/SyncSignature/mcp

VS Code (GitHub Copilot): add a remote MCP server with type http and the URL above.
Any other MCP client: add a remote MCP server with the URL above and complete the browser sign-in.

After connecting, the assistant should read the skill at skills/syncsignature-admin/SKILL.md (also served at https://mcp.syncsignature.com/skills).

Example requests

"Add Priya Shah, priya@acme.com, Sales Manager, to the Sales group."
"Which teammates have no phone number?"
"Change the phone number on the Sales template. Preview it with Priya's details and tell me who it affects first."
"Pause our webinar banner for the Sales group."
"Which teammates got the most signature clicks last month?"
"Is our Google Workspace sync connected?"

Tools (30)

Reads change nothing. Every write asks the user to confirm first.

Tool	Type	What it does
`get_workspace`	Read	The signed-in workspace: name, domain, seat usage, teammate count
`list_teammates`	Read	Teammates with their signature values (paginated)
`get_teammate`	Read	One teammate by id, including signature detail values
`get_teammate_signature`	Read	A teammate's signature HTML and install record (platform, success, time)
`get_teammate_analytics`	Read	Clicks on a teammate's signature links by country, browser, OS and device
`list_signature_links`	Read	Tracked links inside a signature and where each points
`list_groups`	Read	Groups with teammate counts and the template each carries
`list_signature_templates`	Read	The product template catalog with numeric ids
`list_workspace_templates`	Read	Templates this workspace has built, with their groups
`get_workspace_template`	Read	One template's fields and design
`preview_signature`	Read	Render a signature or a proposed template edit without saving
`list_campaigns`	Read	Banner campaigns with schedule and active status
`list_smart_fields`	Read	The field registry: each field's source and whether it is required
`list_integrations`	Read	Connected integrations and whether credentials have expired
`create_teammate`	Write	Add a teammate (optionally straight into a group)
`update_teammate`	Write	Change a teammate's values
`delete_teammate`	Delete	Remove a teammate and their signature
`create_group`	Write	Create a group, optionally with a template
`update_group`	Write	Rename a group or change its template
`delete_group`	Delete	Delete a group and the signatures built from it
`add_teammates_to_group`	Write	Assign teammates to a group, building their signatures
`remove_teammates_from_group`	Write	Take teammates out of a group
`update_workspace_template`	Write	Change a template; goes live for every teammate using it
`update_campaign`	Write	Change a campaign's content, schedule or groups
`pause_campaign`	Write	Pause a running campaign and pull its banner
`resume_campaign`	Write	Resume a paused campaign
`delete_campaign`	Delete	Delete a campaign and remove its banner everywhere
`create_smart_field`	Write	Add a custom field to the registry
`update_smart_field`	Write	Rename, require or rebind a field's source
`delete_smart_field`	Delete	Remove an unused custom field

New banner campaigns are created in the SyncSignature app, because the banner image is uploaded there.

What is in this repository

File	Used by
`server.json`	Official MCP Registry
`.claude-plugin/plugin.json`, `.claude-plugin/marketplace.json`, `.mcp.json`	Claude Code and Cowork plugin
`plugin.json`, `mcp.json`	Cursor Marketplace and Grok Bot (Agent Plugin)
`gemini-extension.json`, `GEMINI.md`	Gemini CLI extension
`skills/syncsignature-admin/SKILL.md`	Agent skill for any client that reads skills
`llms-install.md`	Agent-readable install steps (Cline and others)

Privacy and terms

Privacy: https://syncsignature.com/privacy/
Terms: https://syncsignature.com/terms/

Support

Questions or issues: open an issue here or contact support from https://syncsignature.com.

License

MIT for the manifests and skill in this repository. The SyncSignature service is covered by its own terms at https://syncsignature.com.