What is the key difference between AgentSIM and AgentPhone?

AgentSIM belongs to the Developer Tools category with local stdio execution, while AgentPhone belongs to the Developer Tools category with local stdio execution.

How do I install AgentSIM or AgentPhone 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 AgentSIM and AgentPhone free or paid?

AgentSIM operates under a Free / Open Source model (No auth required). AgentPhone operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

AgentSIM lists 0 tools with 0 views and 0 GitHub stars. AgentPhone lists 0 tools with 0 views and 0 GitHub stars.

Can I use both AgentSIM and AgentPhone 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 AgentSIM or AgentPhone 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 AgentSIM and AgentPhone free to use, or do they require API keys?

AgentSIM is listed under a Free / Open Source model with No auth required . AgentPhone 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 AgentSIM and AgentPhone at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both agentsim and agentphone 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, AgentSIM has a Quality Score of 27 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars. AgentPhone holds a Quality Score of 27 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

AgentSIM vs AgentPhone

In-depth architectural comparison of the AgentSIM and AgentPhone 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

AgentSIM

Developer Tools · Local stdio

Quality: 27/100 (Emerging) | Auth: No auth required

AgentPhone

Developer Tools · Local stdio

Quality: 27/100 (Emerging) | Auth: No auth required

Verdict Summary: Choose AgentSIM if you need specialized Developer Tools tools running via a local process. Choose AgentPhone if your workspace requires Developer Tools integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose AgentSIM when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore AgentSIM Details

Choose AgentPhone when:

You need dedicated capabilities in the Developer Tools domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore AgentPhone Details

Feature & Specification Comparison

Specification	A AgentSIM Developer Tools	A AgentPhone Developer Tools
Summary	Real SIM-backed phone numbers for AI agents — autonomous OTP capture, no VoIP, no human steps.	Give AI agents real phone numbers, messages, and voice calls via MCP.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

AgentSIM Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

AgentPhone Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

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).

AgentSIM Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "agentsim": {
      "command": "npx",
      "args": [
        "-y",
        "agentsim"
      ]
    }
  }
}

AgentPhone Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "agentphone": {
      "command": "npx",
      "args": [
        "-y",
        "agentphone"
      ]
    }
  }
}

Frequently Asked Questions

AgentSIM is categorized under Developer Tools and uses a local stdio subprocess. In contrast, AgentPhone belongs to Developer Tools using local stdio subprocess. Select AgentSIM when you need capabilities focused on developer tools and AgentPhone when you require tools for developer tools.

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