anthropic-api

name	anthropic-api
description	Integrates Anthropic's Claude API for chat completions, messages, and tool use in applications.
category	ai
tags	["anthropic","claude","api","llm","messages"]
models	["sonnet","opus"]
version	1.0.0
created	"2026-05-14T00:00:00.000Z"

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