> ## Documentation Index
> Fetch the complete documentation index at: https://developers.telnyx.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Telnyx CLI llms.txt

> Machine-readable documentation index for Telnyx CLI (Development) — guide pages and API endpoints for AI agents and LLMs

# Telnyx Development: Telnyx CLI — Documentation Index

> Telnyx CLI documentation within the Development section of the Telnyx developer docs ([https://developers.telnyx.com](https://developers.telnyx.com)).
> Root index: [https://developers.telnyx.com/llms.txt](https://developers.telnyx.com/llms.txt) · Development index: [https://developers.telnyx.com/development/llms-txt.md](https://developers.telnyx.com/development/llms-txt.md) · Full content for this subsection: [https://developers.telnyx.com/development/llms/development-telnyx-cli-llms-full-txt.md](https://developers.telnyx.com/development/llms/development-telnyx-cli-llms-full-txt.md)

* [Overview](https://developers.telnyx.com/development/cli.md): The Telnyx CLI is the official command-line interface for managing phone numbers, messaging, calls, and other Telnyx resources from your terminal.
* [Scripting & Automation](https://developers.telnyx.com/development/cli/general-usage.md): Automate workflows with the Telnyx CLI using output formats, filtering, and JSON parsing — patterns for shell scripts, cron jobs, and CI/CD pipelines.
* [Command Reference](https://developers.telnyx.com/development/cli/reference.md): Comprehensive reference for every Telnyx CLI command, auto-generated from the Telnyx REST API with options, examples, and per-resource usage notes.
* [Troubleshooting](https://developers.telnyx.com/development/cli/troubleshooting.md): Troubleshoot common Telnyx CLI errors including authentication failures, missing API keys, and request errors, with solutions mapped to API error codes.

## Getting Started

* [Install](https://developers.telnyx.com/development/cli/getting-started/install.md): Install the Telnyx CLI on macOS, Windows, or Linux using Homebrew, the install script, or by downloading a prebuilt binary for your platform.
* [Quickstart](https://developers.telnyx.com/development/cli/getting-started/quickstart.md): Install the Telnyx CLI, configure authentication, and run your first command in five minutes — send a message, list numbers, or place a call.
* [Authentication](https://developers.telnyx.com/development/cli/getting-started/authentication.md): Authenticate the Telnyx CLI by setting the TELNYX\_API\_KEY environment variable so commands can call Telnyx APIs on your account's behalf.

## Workflows

* [10DLC Registration](https://developers.telnyx.com/development/cli/workflows/10dlc.md): Register your business for US A2P 10DLC messaging using the Telnyx CLI, from brand creation through campaign approval, with copy-paste shell commands.

## Legacy CLI (Deprecated)

* [Overview](https://developers.telnyx.com/development/cli/legacy.md): Documentation for the deprecated @telnyx/api-cli Node.js package. For new projects use the current Telnyx CLI with simpler authentication.
* [Installation](https://developers.telnyx.com/development/cli/legacy/install.md): Install the deprecated @telnyx/api-cli Node.js CLI for legacy projects. New projects should use the current Telnyx CLI for better support.
* [Authentication](https://developers.telnyx.com/development/cli/legacy/authentication.md): Configure API keys and switch between multiple authentication profiles in the deprecated @telnyx/api-cli legacy Node.js CLI.
* [Command Reference](https://developers.telnyx.com/development/cli/legacy/reference.md): Complete command reference for the deprecated @telnyx/api-cli Node.js CLI, retained for legacy projects. New projects should use the current Telnyx CLI.