Anthropic Introduces the ant CLI Tool for Claude API

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Anthropic's quickstart guide presents ant, a command-line interface for sending requests directly to the Claude API from the terminal.

Key points

  1. The ant CLI exposes Claude API resources as subcommands, supporting typed flags, YAML or JSON input, and response filtering.
  2. Unlike curl, it automates list pagination, enables inlining files using @path references, and extracts fields via a built-in --transform query without requiring jq.
  3. Installation is available via Homebrew on macOS, direct binary download on Linux/WSL, or go install using Go 1.25 or later.
  4. Authentication default is a browser-based OAuth flow via ant auth login, removing the need to manage API keys manually.
  5. Shell completion scripts are provided for bash, zsh, fish, and PowerShell.

Why it matters

The tool streamlines using Claude models directly in terminal environments and shell scripts without maintaining custom SDK wrappers or crafting complex curl payloads.

Analysis

By implementing typed flags, inline file references, and built-in filtering, ant significantly lowers the friction of interacting with the Claude API. Native OAuth support makes local developer setup straightforward, while retaining support for headless hosts, API key variables, and Workload Identity Federation for enterprise and CI/CD use.

Mentioned links

Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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