mcp-bastion-langchain

Security middleware for LangChain powered by MCP-Bastion.

Protects your LangChain agents from prompt injection, PII leakage, and resource exhaustion.

Install

pip install mcp-bastion-langchain

Usage

Callback (automatic protection)

from langchain_openai import ChatOpenAI
from mcp_bastion_langchain import BastionSecurityCallback

llm = ChatOpenAI(callbacks=[BastionSecurityCallback()])
llm.invoke("Hello, what is MCP?")

Tool decorator

from mcp_bastion_langchain import secure_tool

@secure_tool
def my_tool(query: str) -> str:
    return f"Result for {query}"

Features

  • Content filtering on all LLM prompts and tool inputs
  • Rate limiting per caller
  • Prompt injection detection
  • PII redaction

License

Same terms as the MCP-Bastion project: see LICENSE. Non-commercial use is free with required citation/attribution; copyright terms apply. Commercial use as defined in the License may need a separate agreement (COMMERCIAL_LICENSE.md).

Project links

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Key dates

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  • Released:
Newer release available (5.0.0)

1 maintainer

PyPI data
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Avatar for vaquarkhan from gravatar.com vaquarkhan

Credits

Author: Vaquar Khan

GitHub Statistics

Data verified by PyPI on 
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

Other/Proprietary License (See LICENSE and COMMERCIAL_LICENSE.md in the MCP-Bastion repository.)

Requires

Python >=3.10

Provides Extra

dev

Tags

bastion langchain llm mcp pii prompt-injection security

Classifiers

Report project as malware

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