Claude CLI

Use Claude CLI when you want strong reasoning and structured output from Anthropic models.

Requirements

• claude CLI installed.

• Authentication completed (ANTHROPIC_API_KEY or claude login).

Setup

1. Install CLI:

npm install -g @anthropic-ai/claude-code

1. Authenticate:

export ANTHROPIC_API_KEY="sk-ant-..."
# or
claude login

1. Verify locally:

claude "hello"

1. Configure in AI Backend settings tab.

Configuration

Setting	Value
Preferred Backend	Claude CLI
Claude CLI Command	claude or full path

Model example:

claude --model sonnet

Notes

Large Prompt Fallback

For very large prompts (threshold: 32000 chars), the extension uses a file-based fallback path instead of direct argument passing. This reduces CLI argument/STDIN size failures on long contexts.

Troubleshooting

• command not found: use full binary path.

• Windows npm shim example: C:\\Users\\<you>\\AppData\\Roaming\\npm\\claude.cmd.

• Auth issues: re-run claude login or verify ANTHROPIC_API_KEY.

• Empty output: check Burp extension output/errors tabs and model flag validity.

Related Pages

• Backends Overview

• Troubleshooting