Claude API Reference Skill

This skill provides essential knowledge and best practices for Claude API development.

Quick Start

from anthropic import Anthropic

client = Anthropic()  # Automatically reads ANTHROPIC_API_KEY from environment
message = client.messages.create(
    model="claude-sonnet-4-5-20250929",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello, Claude"}]
)
print(message.content[0].text)

Core API Endpoints