# Telnyx (MCP server)

> 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 197 GitHub stars, is released under the MIT license and runs locally with npx -y 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.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/team-telnyx/telnyx-node |
| GitHub stars | 197 |
| License | MIT |
| Language | TypeScript |
| Transport | stdio |
| Packages | npm: telnyx |
| Remote URL | none |
| Needs API key | yes |
| Official | yes |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Other |
| Latest release | v7.25.0 (Oct 6, 2026) |
| Last commit | Oct 6, 2026 |
| MCP registry name | io.github.team-telnyx/telnyx |

## Install

### Claude Desktop (claude_desktop_config.json)

```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

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

### Cursor (.cursor/mcp.json)

```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)

```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 2026-10-07.

## Environment variables

- `TELNYX_API_KEY` (secret) (required): Your Telnyx API key for authentication

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