What is the key difference between Callrail MCP and Google Tag Manager MCP Server?

Callrail MCP belongs to the Marketing category with local stdio execution, while Google Tag Manager MCP Server belongs to the Marketing category with local stdio execution.

How do I install Callrail MCP or Google Tag Manager MCP Server in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Callrail MCP and Google Tag Manager MCP Server free or paid?

Callrail MCP operates under a BYOK (Pay Provider Direct) model (API Key required). Google Tag Manager MCP Server operates under a Free / Open Source model (OAuth 2.0).

Which MCP server has more tools and community activity?

Callrail MCP lists 40 tools with 2 views and 2 GitHub stars. Google Tag Manager MCP Server lists 5 tools with 2 views and 212 GitHub stars.

Can I use both Callrail MCP and Google Tag Manager MCP Server together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Callrail MCP vs Google Tag Manager MCP Server

In-depth architectural comparison of the Callrail MCP and Google Tag Manager MCP Server MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Callrail MCP

Marketing · Local stdio

Quality: 60/100 (Good) | Auth: API Key required

Google Tag Manager MCP Server

Marketing · Local stdio

Quality: 60/100 (Good) | Auth: OAuth 2.0

Verdict Summary: Choose Callrail MCP if you need specialized Marketing tools running via a local process. Choose Google Tag Manager MCP Server if your workspace requires Marketing integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Callrail MCP when:

You need dedicated capabilities in the Marketing domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
You have access to required keys: CALLRAIL_API_KEY, CALLRAIL_API_KEY_FILE.
Primary tools included: list_accounts, list_companies, list_trackers.

Explore Callrail MCP Details

Choose Google Tag Manager MCP Server when:

You need dedicated capabilities in the Marketing domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: OAuth 2.0 (Free / Open Source).
You have access to required keys: GOOGLE_CLIENT_ID, GOOGLE_CLIENT_SECRET, COOKIE_ENCRYPTION_KEY, WORKER_HOST, HOSTED_DOMAIN.

Feature & Specification Comparison

Specification	Callrail MCP pghdma Marketing	Google Tag Manager MCP Server stape-io Marketing
Summary	CallRail REST API v3 integration with 49 tools for call tracking, form submissions, transcripts, full CRUD on tags/trackers/companies/users, plus agency-specific aggregation tools (usagesummary for per-client cost attribution, compareperiods for MoM deltas, bulkupdatecalls with dry-run, spamdetector, calleligibilitycheck for Google Ads conversion debugging). Built by an actual CallRail customer for agency use. Install: pipx install callrail-mcp.	This server supports remote MCP connections, includes built-in Google OAuth, and provide an interface to the Google Tag Manager API.
Category & Scope

Tools & Capabilities Breakdown

Callrail MCP Tools (40)

list_accounts

List accessible CallRail accounts

list_companies

List companies (clients) under an account. Optional `status="active"` filter and `page

list_trackers

List tracking phone numbers and their source mapping. Optional `status="active"` filter

get_tracker

Full detail for one tracker

list_calls

Paginated call list. Filter by company, date, and `answer_status

get_call

Full detail for a specific call

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Callrail MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "pghdma-callrail-mcp": {
      "command": "uvx",
      "args": [
        "callrail-mcp"
      ],
      "env": {
        "CALLRAIL_API_KEY": "YOUR_CALLRAIL_API_KEY_HERE",
        "CALLRAIL_API_KEY_FILE": "YOUR_CALLRAIL_API_KEY_FILE_HERE"
      }
    }
  }
}

Google Tag Manager MCP Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "stape-io-google-tag-manager-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "google-tag-manager-mcp-server"
      ],
      "env": {
        "GOOGLE_CLIENT_ID": "YOUR_GOOGLE_CLIENT_ID_HERE",
        "GOOGLE_CLIENT_SECRET": "YOUR_GOOGLE_CLIENT_SECRET_HERE",
        "COOKIE_ENCRYPTION_KEY": "YOUR_COOKIE_ENCRYPTION_KEY_HERE",
        "WORKER_HOST": "YOUR_WORKER_HOST_HERE",
        "HOSTED_DOMAIN": "YOUR_HOSTED_DOMAIN_HERE"
      }
    }
  }
}

Frequently Asked Questions

Callrail MCP is categorized under Marketing and uses a local stdio subprocess. In contrast, Google Tag Manager MCP Server belongs to Marketing using local stdio subprocess. Select Callrail MCP when you need capabilities focused on marketing and Google Tag Manager MCP Server when you require tools for marketing.

More alternatives to Callrail MCP More alternatives to Google Tag Manager MCP Server Marketing category hub