What is the key difference between Slack Mcp Server and MailFixture?

Slack Mcp Server belongs to the Communication category with local stdio execution, while MailFixture belongs to the Communication category with cloud HTTP/SSE execution.

How do I install Slack Mcp Server or MailFixture 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 Slack Mcp Server and MailFixture free or paid?

Slack Mcp Server operates under a Free / Open Source model (other). MailFixture operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Slack Mcp Server lists 7 tools with 1 views and 1,777 GitHub stars. MailFixture lists 0 tools with 0 views and 0 GitHub stars.

Can I use both Slack Mcp Server and MailFixture 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.

How do I install Slack Mcp Server or MailFixture in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are Slack Mcp Server and MailFixture free to use, or do they require API keys?

Slack Mcp Server is listed under a Free / Open Source model with other . MailFixture operates under a Free / Open Source model with No auth required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both Slack Mcp Server and MailFixture at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both korotovsky-slack-mcp-server and mailfixture as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, Slack Mcp Server has a Quality Score of 61 /100 ( Good ) with 1 views, 0 installs, and 1,777 GitHub stars. MailFixture holds a Quality Score of 42 /100 ( Fair ) with 0 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

Slack Mcp Server vs MailFixture

In-depth architectural comparison of the Slack Mcp Server and MailFixture 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

Slack Mcp Server

Communication · Local stdio

Quality: 61/100 (Good) | Auth: other

MailFixture

Communication · Remote HTTP/SSE

Quality: 42/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Slack Mcp Server if you need specialized Communication tools running via a local process. Choose MailFixture if your workspace requires Communication integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Slack Mcp Server when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Free / Open Source).
You have access to required keys: SLACK_MCP_ADD_MESSAGE_TOOL.
Primary tools included: UserID, UserName, RealName.

Explore Slack Mcp Server Details

Choose MailFixture 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).

Explore MailFixture Details

Feature & Specification Comparison

Specification	Slack Mcp Server korotovsky Communication	M MailFixture Communication
Summary	The most powerful MCP server for Slack Workspaces.	Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links.
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

Slack Mcp Server Tools (7)

UserID

User ID (e.g., `U1234567890`)

UserName

Slack username

RealName

User's real name

DisplayName

User's display name

User's email address

Title

User's job title

DMChannelID

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).

Slack Mcp Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "korotovsky-slack-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/inspector"
      ],
      "env": {
        "SLACK_MCP_ADD_MESSAGE_TOOL": "YOUR_SLACK_MCP_ADD_MESSAGE_TOOL_HERE"
      }
    }
  }
}

MailFixture Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mailfixture": {
      "url": "https://mailfixture.com"
    }
  }
}

Frequently Asked Questions

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

More alternatives to Slack Mcp Server More alternatives to MailFixture Communication category hub