Anthropic Api

Anthropic API

> Build applications with Claude's Messages API and tool use.

Quick Start

from anthropic import Anthropic
client = Anthropic()
response = client.messages.create(model="claude-sonnet-4-20250514", max_tokens=1024, messages=[{"role": "user", "content": "Hello!"}])
print(response.content[0].text)

Messages with System Prompt

response = client.messages.create(model="claude-sonnet-4-20250514", max_tokens=1024, system="You are a helpful coding assistant.", messages=[{"role": "user", "content": "Write a Python function to sort a list"}])

Tool Use

tools = [{"name": "get_weather", "description": "Get current weather", "input_schema": {"type": "object", "properties": {"location": {"type": "string"}, "unit": {"type": "string", "enum": ["c", "f"]}}, "required": ["location"]}}]
response = client.messages.create(model="claude-sonnet-4-20250514", max_tokens=1024, messages=[...], tools=tools)

When to Use

• Building with Claude models; Tool-use agents; Multi-turn conversations

Validation

1. API key authenticates; 2. Messages API returns completions; 3. Tool use requests are properly formatted

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: ssrjkk
• Source: ssrjkk/claude-skills
• License: MIT
• Homepage: https://claude.ai

Install and usage instructions live in the source repository linked above.