CallSync MCP Server

com.callsyncapp/callsyncv1.1.0

Search business calls, review conversation insights, and manage CRM follow-ups with CallSync.

remoteofficial registry

context tax

pending

security

pending

cold start

hosted

freshness

Active6d ago

Our reading of CallSync, from the data

CallSync is a crm & marketing MCP server, listed in the official MCP Registry.

We haven't measured its tool list yet, so its token cost is unknown.

Maintenance is active: the last public signal was 6 days ago (2026-10-13). For comparison, 73% of crm & marketing servers are active or maintained.

It runs as a hosted endpoint, so there is nothing to install.

Install CallSync MCP server

claude mcp add --transport http callsync https://mcp.callsyncapp.com/connect

{
  "mcpServers": {
    "callsync": {
      "url": "https://mcp.callsyncapp.com/connect"
    }
  }
}

{
  "mcpServers": {
    "callsync": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp.callsyncapp.com/connect"
      ]
    }
  }
}

Or add it as a custom connector under Settings → Connectors. The config above bridges via mcp-remote.

{
  "servers": {
    "callsync": {
      "type": "http",
      "url": "https://mcp.callsyncapp.com/connect"
    }
  }
}

{
  "mcpServers": {
    "callsync": {
      "serverUrl": "https://mcp.callsyncapp.com/connect"
    }
  }
}

Remote endpoints

streamable-httphttps://mcp.callsyncapp.com/connect

Freshness

Active — last maintenance signal 6d ago. The newest of the signals below sets the band.

Last commit (default branch)
no data · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-13 · 6d ago · official registry · v1.1.0

How it compares in CRM & Marketing

Against the most-starred crm & marketing servers we index. Token cost is per model turn, measured from each server's live tool list.

Server	Stars	Tools	Tokens / turn	Freshness	Runs
CallSync (this)	—	—	not measured	Active	hosted
Atlassian	6,014	—	not measured	Active	—
Google Ads + Meta Ads + SEO/GEO	5,241	—	not measured	Active	hosted
AdsAgent	3,959	—	not measured	Deprecated	hosted
Meta Ads	1,313	—	not measured	Active	—
Reticle	1,258	—	not measured	Active	local

All crm & marketing MCP servers

FAQ

›How do I install the CallSync MCP server in Claude Code?

Run: claude mcp add --transport http callsync https://mcp.callsyncapp.com/connect. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does CallSync require an API key?

No required environment variables are declared in its published metadata.

›Can I use CallSync as a remote (hosted) MCP server?

Yes. It is a hosted MCP server; connect to its URL with any client that supports remote MCP.

›Is CallSync in the official MCP registry?

Yes, as com.callsyncapp/callsync.

Sources and method

Official MCP Registry entry: updated 2026-10-13
Last checked against all sources: 2026-10-19

The description, packages and links come from the maintainer's own published metadata. Token cost, security signals, freshness and the reading above are MCPSkillHub's own measurements; see the methodology. Spot an error? Request a correction or claim the listing.