What is the key difference between SendLetter and Agent Skills Search Server?

SendLetter belongs to the Developer Tools category with local stdio execution, while Agent Skills Search Server belongs to the Developer Tools category with cloud HTTP/SSE execution.

How do I install SendLetter or Agent Skills Search 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 SendLetter and Agent Skills Search Server free or paid?

SendLetter operates under a Free / Open Source model (No auth required). Agent Skills Search Server operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

SendLetter lists 0 tools with 0 views and 0 GitHub stars. Agent Skills Search Server lists 0 tools with 0 views and 24,095 GitHub stars.

Can I use both SendLetter and Agent Skills Search 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.

How do I install SendLetter or Agent Skills Search Server 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 SendLetter and Agent Skills Search Server free to use, or do they require API keys?

SendLetter is listed under a Free / Open Source model with No auth required . Agent Skills Search Server 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 SendLetter and Agent Skills Search Server at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both sendletter and agent-skills-search-server 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, SendLetter has a Quality Score of 27 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars. Agent Skills Search Server holds a Quality Score of 48 /100 ( Fair ) with 0 views, 0 installs, and 24,095 GitHub stars.

Side-by-Side Model Context Protocol Comparison

SendLetter vs Agent Skills Search Server

In-depth architectural comparison of the SendLetter and Agent Skills Search 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

SendLetter

Developer Tools · Local stdio

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

Agent Skills Search Server

Developer Tools · Remote HTTP/SSE

Quality: 48/100 (Fair) | Auth: No auth required

Verdict Summary: Choose SendLetter if you need specialized Developer Tools tools running via a local process. Choose Agent Skills Search Server if your workspace requires Developer Tools integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose SendLetter 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 SendLetter Details

Choose Agent Skills Search Server when:

You need dedicated capabilities in the Developer Tools domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore Agent Skills Search Server Details

Feature & Specification Comparison

Specification	S SendLetter Developer Tools	A Agent Skills Search Server Developer Tools
Summary	Send real, printed letters by post across Europe. Requires a free account; quote before sending.	Search and discover Agent Skills from the skills.sh registry. Powered by HAPI MCP server.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

SendLetter Tools (0)

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

Agent Skills Search Server 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).

SendLetter Configuration

mcpServers (Claude Desktop / Cursor)

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

Agent Skills Search Server Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "agent-skills-search-server": {
      "url": "https://img.shields.io/badge/Discord-Join-5865F2?logo=discord&logoColor=white)](https://discord.gg/MKPE9g8aUy"
    }
  }
}

Frequently Asked Questions

SendLetter is categorized under Developer Tools and uses a local stdio subprocess. In contrast, Agent Skills Search Server belongs to Developer Tools using remote streaming HTTP/SSE transport. Select SendLetter when you need capabilities focused on developer tools and Agent Skills Search Server when you require tools for developer tools.

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