Code Examples

import asyncio
from claude_agent_sdk import query, ClaudeAgentOptions

async def main():
    async for message in query(
        prompt="Read package.json and tell me the main entry point",
        options=ClaudeAgentOptions(allowed_tools=["Read"])
    ):
        print(f"Message: {message}")

asyncio.run(main())

from datetime import datetime, timedelta
from collections import defaultdict

user_calls = defaultdict(list)
max_calls_per_hour = 10

def check_rate_limit(user_id: str) -> bool:
    now = datetime.now()
    hour_ago = now - timedelta(hours=1)

    user_calls[user_id] = [
        t for t in user_calls[user_id]
        if t > hour_ago
    ]

    if len(user_calls[user_id]) >= max_calls_per_hour:
        return False

    user_calls[user_id].append(now)
    return True

---
type: agent
description: Security specialist reviewing code for vulnerabilities
model: sonnet
tools:
  - Read
  - Grep
  - WebSearch
---

You are a code security reviewer. Check for:
- SQL injection, XSS vulnerabilities
- Insecure cryptography
- Exposed secrets
- Authentication bypass risks

Format: Issue: [name] | Severity: [level] | Fix: [suggestion]

import { tool } from "@anthropic-ai/claude-agent-sdk";
import { z } from "zod";

const getTemperature = tool(
  "get_temperature",
  "Get current temperature at a location",
  {
    latitude: z.number(),
    longitude: z.number(),
    unit: z.enum(["celsius", "fahrenheit"])
  },
  async (args) => {
    const response = await fetch(
      `https://api.weather.example.com/temp?lat=${args.latitude}&lon=${args.longitude}`
    );
    const { temperature } = await response.json();
    return {
      content: [{
        type: "text" as const,
        text: `Temperature: ${temperature}°${args.unit[0].toUpperCase()}`
      }]
    };
  }
);