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# Framework Integrations
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Pre-built integrations with popular AI frameworks including LangChain and LlamaIndex callback handlers.
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## Capabilities
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### LangChain Integration
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```python { .api }
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from portkey_ai.langchain import PortkeyLangchainCallbackHandler
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class PortkeyLangchainCallbackHandler:
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    """Callback handler for LangChain integration with Portkey observability"""
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    def __init__(
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        self,
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        api_key: Optional[str] = None,
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        base_url: Optional[str] = None,
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        **kwargs
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    ): ...
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```
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### LlamaIndex Integration
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```python { .api }
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from portkey_ai.llamaindex import PortkeyLlamaCallbackHandler
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class PortkeyLlamaCallbackHandler:
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    """Callback handler for LlamaIndex integration with Portkey observability"""
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    def __init__(
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        self,
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        api_key: Optional[str] = None,
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        base_url: Optional[str] = None,
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        **kwargs
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    ): ...  
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```
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## Usage Examples
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```python
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# LangChain integration
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from langchain.llms import OpenAI
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from portkey_ai.langchain import PortkeyLangchainCallbackHandler
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handler = PortkeyLangchainCallbackHandler(
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    api_key="PORTKEY_API_KEY"
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)
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llm = OpenAI(callbacks=[handler])
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response = llm("What is AI?")
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# LlamaIndex integration
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from llama_index.core import SimpleDirectoryReader
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from portkey_ai.llamaindex import PortkeyLlamaCallbackHandler
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handler = PortkeyLlamaCallbackHandler(
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    api_key="PORTKEY_API_KEY"
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)
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# Use with LlamaIndex operations
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```