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Telnyx

Telnyx is an MCP server that adds tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Official TypeScript library for the Telnyx API. It has 198 GitHub stars, is released under the MIT license and runs locally with npx -y telnyx.

github.com/team-telnyx/telnyx-node (opens in a new tab)

Data as of from the GitHub API and the official MCP registry; description from the project's repository. Report an error

View on GitHub (opens in a new tab)

Install Telnyx

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "telnyx": {
      "command": "npx",
      "args": [
        "-y",
        "telnyx"
      ],
      "env": {
        "TELNYX_API_KEY": "your-value"
      }
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --env TELNYX_API_KEY=your-value --transport stdio telnyx -- npx -y telnyx

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "telnyx": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "telnyx"
      ],
      "env": {
        "TELNYX_API_KEY": "your-value"
      }
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "inputs": [
    {
      "type": "promptString",
      "id": "telnyx_api_key",
      "description": "TELNYX_API_KEY",
      "password": true
    }
  ],
  "servers": {
    "telnyx": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "telnyx"
      ],
      "env": {
        "TELNYX_API_KEY": "${input:telnyx_api_key}"
      }
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

Environment variables

Variables the server reads at startup.

NameRequiredDescription
TELNYX_API_KEYsecretYesYour Telnyx API key for authentication

About Telnyx

This library provides convenient access to the Telnyx REST API from server-side TypeScript or JavaScript. The full API of this library can be found in api.md.

  • hacktoberfest
  • ai-call-assistant
  • ai-phone-agent
  • ai-receptionist
  • ai-text-to-speech
  • ai-voice-agent
  • ai-voice-agents
  • ai-voice-generator
  • call-forwarding
  • call-recording

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FAQ

Telnyx FAQ

Still curious? Email info@appsgit.com.

How do I install the Telnyx MCP server?

Add the command npx -y telnyx to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is Telnyx free?

The server is open source under the MIT license, so running it is free. It needs credentials (TELNYX_API_KEY) for the service it connects to, which may require a paid account.

Is Telnyx actively maintained?

The most recent commit was on Oct 22, 2026. The latest release is v7.28.0, published Oct 22, 2026. appsgit only lists MCP servers with a commit in the last six months.