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fix: working claude code with agent SDKs (#20081)

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Ishaan Jaff 2026-01-30 11:58:05 -08:00 committed by GitHub
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4 changed files with 346 additions and 120 deletions
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29
cookbook/anthropic_agent_sdk/README.md
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@ -22,10 +22,24 @@ litellm --config config.yaml
### 3. Run the chat
**Basic Agent (no MCP):**
```bash
python main.py
```
**Agent with MCP (DeepWiki2 for research):**
```bash
python agent_with_mcp.py
```
If MCP connection fails, you can disable it:
```bash
USE_MCP=false python agent_with_mcp.py
```
That's it! You can now chat with the agent in your terminal.
### Chat Commands
@ -45,11 +59,19 @@ Set these environment variables if needed:
```bash
export LITELLM_PROXY_URL="http://localhost:4000"
export LITELLM_API_KEY="sk-1234"
export LITELLM_MODEL="claude-sonnet-4-20250514"
export LITELLM_MODEL="bedrock-claude-sonnet-4.5"
```
Or just use the defaults - it'll connect to `http://localhost:4000` by default.
## Files
- `main.py` - Basic interactive agent without MCP
- `agent_with_mcp.py` - Agent with MCP server integration (DeepWiki2)
- `common.py` - Shared utilities and functions
- `config.example.yaml` - Example LiteLLM configuration
- `requirements.txt` - Python dependencies
## Example Config File
If you want to use multiple models, create a `config.yaml` (see `config.example.yaml`):
@ -110,6 +132,11 @@ Note: Don't add `/anthropic` to the base URL - LiteLLM handles the routing autom
- Check the model name matches what's in your LiteLLM config
- Run `litellm --model your-model` to test it works
**Agent with MCP stuck or failing?**
- The MCP server might not be available at `http://localhost:4000/mcp/deepwiki2`
- Try disabling MCP: `USE_MCP=false python agent_with_mcp.py`
- Or use the basic agent: `python main.py`
## Learn More
- [LiteLLM Docs](https://docs.litellm.ai/)

140
cookbook/anthropic_agent_sdk/agent_with_mcp.py Normal file
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@ -0,0 +1,140 @@
"""
Interactive Claude Agent SDK CLI with MCP Support
This example demonstrates an interactive CLI chat with the Anthropic Agent SDK using LiteLLM as a proxy,
with MCP (Model Context Protocol) server integration for enhanced capabilities.
"""
import asyncio
import os
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions
from common import (
Config,
fetch_available_models,
setup_litellm_env,
print_header,
handle_model_list,
handle_model_switch,
stream_response,
)
async def interactive_chat_with_mcp():
"""
Interactive CLI chat with the agent and MCP server
"""
config = Config()
# Configure Anthropic SDK to point to LiteLLM gateway
litellm_base_url = setup_litellm_env(config)
# Fetch available models from proxy
available_models = await fetch_available_models(litellm_base_url, config.LITELLM_API_KEY)
current_model = config.LITELLM_MODEL
# MCP server configuration
mcp_server_url = f"{litellm_base_url}/mcp/deepwiki2"
use_mcp = os.getenv("USE_MCP", "true").lower() == "true"
if not use_mcp:
print("⚠️ MCP disabled via USE_MCP=false")
print_header(litellm_base_url, current_model, has_mcp=use_mcp)
while True:
# Configure agent options
if use_mcp:
try:
# Try with MCP server (HTTP transport)
# Using McpHttpServerConfig format from Agent SDK
options = ClaudeAgentOptions(
system_prompt="You are a helpful AI assistant with access to DeepWiki for research. Be concise, accurate, and friendly.",
model=current_model,
max_turns=50,
mcp_servers={
"deepwiki2": {
"type": "http",
"url": mcp_server_url,
"headers": {
"Authorization": f"Bearer {config.LITELLM_API_KEY}"
}
}
},
)
except Exception as e:
print(f"⚠️ Warning: Could not configure MCP server: {e}")
print("Continuing without MCP...\n")
use_mcp = False
options = ClaudeAgentOptions(
system_prompt="You are a helpful AI assistant. Be concise, accurate, and friendly.",
model=current_model,
max_turns=50,
)
else:
# Without MCP
options = ClaudeAgentOptions(
system_prompt="You are a helpful AI assistant. Be concise, accurate, and friendly.",
model=current_model,
max_turns=50,
)
# Create agent client
try:
async with ClaudeSDKClient(options=options) as client:
conversation_active = True
while conversation_active:
# Get user input
try:
user_input = input("\n👤 You: ").strip()
except (EOFError, KeyboardInterrupt):
print("\n\n👋 Goodbye!")
return
# Handle commands
if user_input.lower() in ['quit', 'exit']:
print("\n👋 Goodbye!")
return
if user_input.lower() == 'clear':
print("\n🔄 Starting new conversation...\n")
conversation_active = False
continue
if user_input.lower() == 'models':
handle_model_list(available_models, current_model)
continue
if user_input.lower() == 'model':
new_model, should_restart = handle_model_switch(available_models, current_model)
if should_restart:
current_model = new_model
conversation_active = False
continue
if not user_input:
continue
# Stream response from agent
await stream_response(client, user_input)
except Exception as e:
print(f"\n❌ Error creating agent client: {e}")
print("This might be an MCP configuration issue. Try running without MCP:")
print(" USE_MCP=false python agent_with_mcp.py")
print("\nOr use the basic agent:")
print(" python main.py")
return
def main():
"""Run interactive chat with MCP"""
try:
asyncio.run(interactive_chat_with_mcp())
except KeyboardInterrupt:
print("\n\n👋 Goodbye!")
if __name__ == "__main__":
main()

160
cookbook/anthropic_agent_sdk/common.py Normal file
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@ -0,0 +1,160 @@
"""
Common utilities for Claude Agent SDK examples
"""
import os
import httpx
class Config:
"""Configuration for LiteLLM Gateway connection"""
# LiteLLM proxy URL (default to local instance)
LITELLM_PROXY_URL = os.getenv("LITELLM_PROXY_URL", "http://localhost:4000")
# LiteLLM API key (master key or virtual key)
LITELLM_API_KEY = os.getenv("LITELLM_API_KEY", "sk-1234")
# Model name as configured in LiteLLM (e.g., "bedrock-claude-sonnet-4", "gpt-4", etc.)
LITELLM_MODEL = os.getenv("LITELLM_MODEL", "bedrock-claude-sonnet-4.5")
async def fetch_available_models(base_url: str, api_key: str) -> list[str]:
"""
Fetch available models from LiteLLM proxy /models endpoint
"""
try:
async with httpx.AsyncClient() as client:
response = await client.get(
f"{base_url}/models",
headers={"Authorization": f"Bearer {api_key}"},
timeout=10.0
)
response.raise_for_status()
data = response.json()
return [model["id"] for model in data.get("data", [])]
except Exception as e:
print(f"⚠️ Warning: Could not fetch models from proxy: {e}")
print("Using default model list...")
# Fallback to default models
return [
"bedrock-claude-sonnet-3.5",
"bedrock-claude-sonnet-4",
"bedrock-claude-sonnet-4.5",
"bedrock-claude-opus-4.5",
"bedrock-nova-premier",
]
def setup_litellm_env(config: Config):
"""
Configure environment variables to point Agent SDK to LiteLLM
"""
litellm_base_url = config.LITELLM_PROXY_URL.rstrip('/')
os.environ["ANTHROPIC_BASE_URL"] = litellm_base_url
os.environ["ANTHROPIC_API_KEY"] = config.LITELLM_API_KEY
return litellm_base_url
def print_header(base_url: str, current_model: str, has_mcp: bool = False):
"""
Print the chat header
"""
mcp_indicator = " + MCP" if has_mcp else ""
print("=" * 70)
print(f"🤖 Claude Agent SDK with LiteLLM Gateway{mcp_indicator} - Interactive Chat")
print("=" * 70)
print(f"🚀 Connected to: {base_url}")
print(f"📦 Current model: {current_model}")
if has_mcp:
print("🔌 MCP: deepwiki2 enabled")
print("\nType your messages below. Commands:")
print(" - 'quit' or 'exit' to end the conversation")
print(" - 'clear' to start a new conversation")
print(" - 'model' to switch models")
print(" - 'models' to list available models")
print("=" * 70)
print()
def handle_model_list(available_models: list[str], current_model: str):
"""
Display available models
"""
print("\n📋 Available models:")
for i, model in enumerate(available_models, 1):
marker = "✓" if model == current_model else " "
print(f" {marker} {i}. {model}")
def handle_model_switch(available_models: list[str], current_model: str) -> tuple[str, bool]:
"""
Handle model switching
Returns:
tuple: (new_model, should_restart_conversation)
"""
print("\n📋 Select a model:")
for i, model in enumerate(available_models, 1):
marker = "✓" if model == current_model else " "
print(f" {marker} {i}. {model}")
try:
choice = input("\nEnter number (or press Enter to cancel): ").strip()
if choice:
idx = int(choice) - 1
if 0 <= idx < len(available_models):
new_model = available_models[idx]
print(f"\n✅ Switched to: {new_model}")
print("🔄 Starting new conversation with new model...\n")
return new_model, True
else:
print("❌ Invalid choice")
except (ValueError, IndexError):
print("❌ Invalid input")
return current_model, False
async def stream_response(client, user_input: str):
"""
Stream response from the agent
"""
print("\n🤖 Assistant: ", end='', flush=True)
try:
await client.query(user_input)
# Show loading indicator
print("⏳ thinking...", end='', flush=True)
# Stream the response
first_chunk = True
async for msg in client.receive_response():
# Clear loading indicator on first message
if first_chunk:
print("\r🤖 Assistant: ", end='', flush=True)
first_chunk = False
# Handle different message types
if hasattr(msg, 'type'):
if msg.type == 'content_block_delta':
# Streaming text delta
if hasattr(msg, 'delta') and hasattr(msg.delta, 'text'):
print(msg.delta.text, end='', flush=True)
elif msg.type == 'content_block_start':
# Start of content block
if hasattr(msg, 'content_block') and hasattr(msg.content_block, 'text'):
print(msg.content_block.text, end='', flush=True)
# Fallback to original content handling
if hasattr(msg, 'content'):
for content_block in msg.content:
if hasattr(content_block, 'text'):
print(content_block.text, end='', flush=True)
print() # New line after response
except Exception as e:
print(f"\r\n❌ Error: {e}")
print("Please check your LiteLLM gateway is running and configured correctly.")

137
cookbook/anthropic_agent_sdk/main.py
View File

@ -6,50 +6,17 @@ LiteLLM acts as a unified interface, allowing you to use any LLM provider (OpenA
through the Claude Agent SDK by pointing it to the LiteLLM gateway.
"""
import os
import asyncio
import httpx
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions
class Config:
"""Configuration for LiteLLM Gateway connection"""
# LiteLLM proxy URL (default to local instance)
LITELLM_PROXY_URL = os.getenv("LITELLM_PROXY_URL", "http://localhost:4000")
# LiteLLM API key (master key or virtual key)
LITELLM_API_KEY = os.getenv("LITELLM_API_KEY", "sk-1234")
# Model name as configured in LiteLLM (e.g., "bedrock-claude-sonnet-4", "gpt-4", etc.)
LITELLM_MODEL = os.getenv("LITELLM_MODEL", "bedrock-claude-sonnet-4.5")
async def fetch_available_models(base_url: str, api_key: str) -> list[str]:
"""
Fetch available models from LiteLLM proxy /models endpoint
"""
try:
async with httpx.AsyncClient() as client:
response = await client.get(
f"{base_url}/models",
headers={"Authorization": f"Bearer {api_key}"},
timeout=10.0
)
response.raise_for_status()
data = response.json()
return [model["id"] for model in data.get("data", [])]
except Exception as e:
print(f"⚠️ Warning: Could not fetch models from proxy: {e}")
print("Using default model list...")
# Fallback to default models
return [
"bedrock-claude-sonnet-3.5",
"bedrock-claude-sonnet-4",
"bedrock-claude-sonnet-4.5",
"bedrock-claude-opus-4.5",
"bedrock-nova-premier",
]
from common import (
Config,
fetch_available_models,
setup_litellm_env,
print_header,
handle_model_list,
handle_model_switch,
stream_response,
)
async def interactive_chat():
@ -59,28 +26,14 @@ async def interactive_chat():
config = Config()
# Configure Anthropic SDK to point to LiteLLM gateway
# Note: We don't add /anthropic to the base URL - LiteLLM handles routing
litellm_base_url = config.LITELLM_PROXY_URL.rstrip('/')
os.environ["ANTHROPIC_BASE_URL"] = litellm_base_url
os.environ["ANTHROPIC_API_KEY"] = config.LITELLM_API_KEY
litellm_base_url = setup_litellm_env(config)
# Fetch available models from proxy
available_models = await fetch_available_models(litellm_base_url, config.LITELLM_API_KEY)
current_model = config.LITELLM_MODEL
print("=" * 70)
print("🤖 Claude Agent SDK with LiteLLM Gateway - Interactive Chat")
print("=" * 70)
print(f"🚀 Connected to: {litellm_base_url}")
print(f"📦 Current model: {current_model}")
print("\nType your messages below. Commands:")
print(" - 'quit' or 'exit' to end the conversation")
print(" - 'clear' to start a new conversation")
print(" - 'model' to switch models")
print(" - 'models' to list available models")
print("=" * 70)
print()
print_header(litellm_base_url, current_model)
while True:
# Configure agent options for each conversation
@ -113,75 +66,21 @@ async def interactive_chat():
continue
if user_input.lower() == 'models':
print("\n📋 Available models:")
for i, model in enumerate(available_models, 1):
marker = "✓" if model == current_model else " "
print(f" {marker} {i}. {model}")
handle_model_list(available_models, current_model)
continue
if user_input.lower() == 'model':
print("\n📋 Select a model:")
for i, model in enumerate(available_models, 1):
marker = "✓" if model == current_model else " "
print(f" {marker} {i}. {model}")
try:
choice = input("\nEnter number (or press Enter to cancel): ").strip()
if choice:
idx = int(choice) - 1
if 0 <= idx < len(available_models):
current_model = available_models[idx]
print(f"\n✅ Switched to: {current_model}")
print("🔄 Starting new conversation with new model...\n")
conversation_active = False
else:
print("❌ Invalid choice")
except (ValueError, IndexError):
print("❌ Invalid input")
new_model, should_restart = handle_model_switch(available_models, current_model)
if should_restart:
current_model = new_model
conversation_active = False
continue
if not user_input:
continue
# Send query to agent with loading indicator
print("\n🤖 Assistant: ", end='', flush=True)
try:
await client.query(user_input)
# Show loading indicator
print("⏳ thinking...", end='', flush=True)
# Stream the response
first_chunk = True
async for msg in client.receive_response():
# Clear loading indicator on first message
if first_chunk:
print("\r🤖 Assistant: ", end='', flush=True)
first_chunk = False
# Handle different message types
if hasattr(msg, 'type'):
if msg.type == 'content_block_delta':
# Streaming text delta
if hasattr(msg, 'delta') and hasattr(msg.delta, 'text'):
print(msg.delta.text, end='', flush=True)
elif msg.type == 'content_block_start':
# Start of content block
if hasattr(msg, 'content_block') and hasattr(msg.content_block, 'text'):
print(msg.content_block.text, end='', flush=True)
# Fallback to original content handling
if hasattr(msg, 'content'):
for content_block in msg.content:
if hasattr(content_block, 'text'):
print(content_block.text, end='', flush=True)
print() # New line after response
except Exception as e:
print(f"\r\n❌ Error: {e}")
print("Please check your LiteLLM gateway is running and configured correctly.")
# Stream response from agent
await stream_response(client, user_input)
def main():