What is the key difference between Justcall MCP Server and Getpoststack MCP?

Justcall MCP Server belongs to the Communication category with cloud HTTP/SSE execution, while Getpoststack MCP belongs to the Communication category with local stdio execution.

How do I install Justcall MCP Server or Getpoststack MCP 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 Justcall MCP Server and Getpoststack MCP free or paid?

Justcall MCP Server operates under a Free / Open Source model (No auth required). Getpoststack MCP operates under a BYOK (Pay Provider Direct) model (API Key required).

Which MCP server has more tools and community activity?

Justcall MCP Server lists 67 tools with 0 views and 25 GitHub stars. Getpoststack MCP lists 80 tools with 2 views and 1 GitHub stars.

Can I use both Justcall MCP Server and Getpoststack MCP 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

Justcall MCP Server vs Getpoststack MCP

In-depth architectural comparison of the Justcall MCP Server and Getpoststack MCP 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

Justcall MCP Server

Communication · Remote HTTP/SSE

Quality: 47/100 (Fair) | Auth: No auth required

Getpoststack MCP

Communication · Local stdio

Quality: 56/100 (Good) | Auth: API Key required

Verdict Summary: Choose Justcall MCP Server if you need specialized Communication tools running via a hosted cloud SSE transport. Choose Getpoststack MCP if your workspace requires Communication integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Justcall MCP Server when:

You need dedicated capabilities in the Communication domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: list_calls, get_call, update_call.

Explore Justcall MCP Server Details

Choose Getpoststack MCP when:

You need dedicated capabilities in the Communication 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: POSTSTACK_API_KEY.
Primary tools included: send_email, send_batch_emails, list_emails.

Explore Getpoststack MCP Details

Feature & Specification Comparison

Specification	Justcall MCP Server Communication	Getpoststack MCP getpoststack Communication
Summary	JustCall's Official MCP Server	EU-hosted email API exposed as MCP tools — send transactional and marketing email, manage contacts and segments, run broadcasts, render templates, and read analytics from Claude/Cursor. GDPR compliant, EU-only data residency (Germany + Finland). npx -y @poststack.dev/mcp.
Category & Scope	Communication

Tools & Capabilities Breakdown

Justcall MCP Server Tools (67)

list_calls

Lists all JustCall calls with various filtering options

get_call

Get a specific JustCall call by ID

update_call

Update a JustCall call (disposition, notes, rating)

get_call_journey

Fetch the sequence of events for a specific call

get_voice_agent_data

Get voice agent data for a specific call (deprecated, use get_voice_agent_call)

get_voice_agent_call

Retrieve voice agent related data 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).

Justcall MCP Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "justcall-mcp-server": {
      "url": "https://mcp.justcall.host/mcp"
    }
  }
}

Getpoststack MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "getpoststack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@poststack.dev/mcp"
      ],
      "env": {
        "POSTSTACK_API_KEY": "YOUR_POSTSTACK_API_KEY_HERE"
      }
    }
  }
}

Frequently Asked Questions

Justcall MCP Server is categorized under Communication and uses a remote streaming HTTP/SSE transport. In contrast, Getpoststack MCP belongs to Communication using local stdio subprocess. Select Justcall MCP Server when you need capabilities focused on communication and Getpoststack MCP when you require tools for communication.

More alternatives to Justcall MCP Server More alternatives to Getpoststack MCP Communication category hub Canonical compare URL