Is it safe to check my password using this tool?

Yes. This agent uses the K-Anonymity model. Only the first 5 characters of your password's SHA-1 hash are sent to the HIBP server. The full password or full hash never leaves your local environment, making it cryptographically safe.

Where can I get an API Key?

You can purchase an API key directly from the [HIBP website](https://haveibeenpwned.com/API/Key). It requires a small monthly subscription to prevent mass scraping and abuse.

Have I Been Pwned MCP Server for LangChain 5 tools — connect in under 2 minutes

Name: Have I Been Pwned
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 5 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect Have I Been Pwned through the Vinkius and LangChain agents can call every tool natively — combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token — get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "have-i-been-pwned": {
            "transport": "streamable_http",
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
        }
    }) as client:
        tools = client.get_tools()
        agent = create_react_agent(
            ChatOpenAI(model="gpt-4o"),
            tools,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using Have I Been Pwned, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Have I Been Pwned MCP Server

Connect your AI agent to Have I Been Pwned, the internet's most trusted resource for tracking data breaches. Protect yourself by staying informed about where your sensitive information may have been leaked.

LangChain's ecosystem of 500+ components combines seamlessly with Have I Been Pwned through native MCP adapters. Connect 5 tools via the Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures — with LangSmith tracing giving full visibility into every tool call, latency, and token cost.

What you can do

Account Search — Instantly check if an email or username has been involved in any of the thousands of tracked data breaches
Paste Search — Discover if your information is circulating on public paste sites (like Pastebin)
Password Safety — Safely verify if a password has ever appeared in a breach using the secure K-Anonymity model (your full password is never sent to the server)
Breach Catalog — Explore the full history of major internet data breaches, including what types of data were stolen (passwords, emails, phone numbers, etc.)

The Have I Been Pwned MCP Server exposes 5 tools through the Vinkius. Connect it to LangChain in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Have I Been Pwned to LangChain via MCP

Follow these steps to integrate the Have I Been Pwned MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 5 tools from Have I Been Pwned via MCP

Why Use LangChain with the Have I Been Pwned MCP Server

LangChain provides unique advantages when paired with Have I Been Pwned through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents — combine Have I Been Pwned MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across Have I Been Pwned queries for multi-turn workflows

Have I Been Pwned + LangChain Use Cases

Practical scenarios where LangChain combined with the Have I Been Pwned MCP Server delivers measurable value.

RAG with live data: combine Have I Been Pwned tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query Have I Been Pwned, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain Have I Been Pwned tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every Have I Been Pwned tool call, measure latency, and optimize your agent's performance

Have I Been Pwned MCP Tools for LangChain (5)

These 5 tools become available when you connect Have I Been Pwned to LangChain via MCP:

check_password_safety

Uses k-anonymity; your full password is never sent to the server. Check if a password has ever appeared in a data breach (safe, k-anonymity search)

get_breach_details

Get details for a specific data breach by name

list_all_breaches

List all data breaches currently recorded in the system

search_account_breaches

Search for all data breaches an email or account has been involved in

search_account_pastes

Search for all public pastes (like Pastebin) containing the email or account

Example Prompts for Have I Been Pwned in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with Have I Been Pwned immediately.

"Has my email 'test@example.com' been involved in any breaches?"

"Is the password 'P@ssword123' safe to use?"

Troubleshooting Have I Been Pwned MCP Server with LangChain

Common issues when connecting Have I Been Pwned to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Have I Been Pwned + LangChain FAQ

Common questions about integrating Have I Been Pwned MCP Server with LangChain.

How does LangChain connect to MCP servers?

Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.

Which LangChain agent types work with MCP?

All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.