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"How to Query a Knowledge Graph Using an Ontology" matching MCP servers:

  • mcp-query

    ottimis
    F
    license
    A
    quality
    D
    maintenance
    A local MCP server for secure database querying from Claude Code, with Apple Keychain credential storage, permission-based access control, and audit logging.
    Last updated
    5

  • erlik-graph

    malkreide
    A
    license
    -
    quality
    B
    maintenance
    Enables LLMs to perform OSINT link-analysis by exposing transforms (DNS, WHOIS, Shodan, etc.) as MCP tools for autonomous investigation and graph enrichment.
    Last updated
    MIT

  • ms-graph-mcp

    MSPbotsAI
    A
    license
    -
    quality
    C
    maintenance
    Exposes Azure Entra ID user and license management as MCP tools over HTTP-SSE, enabling operations such as user creation, group assignment, and license management via Microsoft Graph API.
    Last updated
    Apache 2.0

  • query-sanitizer-mcp

    vidoluco
    F
    license
    -
    quality
    C
    maintenance
    A local DLP middleware that redacts sensitive information from prompts using local models before they reach external LLMs. It provides tools to sanitize queries, restore placeholders in responses, and manage a ledger of redactions to maintain data privacy.
    Last updated
    1

  • MCP Microsoft Graph Server

    tcpatter
    -
    license
    -
    quality
    -
    maintenance
    Provides secure access to Microsoft Entra ID (Azure AD) resources including users, devices, and applications through Microsoft Graph API. Enables querying organizational data with comprehensive audit logging to Azure Blob Storage.
    Last updated
  • WhisperGraph by whisper-sec

    WhisperGraphofficial

    whisper-sec
    A
    license
    A
    quality
    B
    maintenance
    Self-hostable MCP server for WhisperGraph — a graph of 7.39B nodes / 39B edges mapping DNS, BGP, GeoIP, WHOIS, and threat intelligence. Six read-only tools (Cypher query + schema introspection + threat assessment), six resources, eight investigation prompts. stdio and Streamable HTTP transports.
    Last updated
    8
    68
    1
    Apache 2.0

  • A-SOC Trust MCP Server

    agntor
    A
    license
    -
    quality
    -
    maintenance
    Provides agent certification and trust verification tools for AI agents, enabling certification checks, trust score calculations, audit ticket issuance, and emergency kill switch activation through the A-SOC trust network.
    Last updated
    1

  • SQL Query Tools MCP Server

    negrip
    F
    license
    -
    quality
    D
    maintenance
    MCP server for connecting to SQL Server in readonly mode. Allows any MCP client to explore the schema and run SELECT queries against a SQL Server database.
    Last updated

  • mcpypi

    rsp2k
    A
    license
    -
    quality
    D
    maintenance
    MCP server for comprehensive PyPI package intelligence, providing tools for dependency analysis, security scanning, health scoring, license compliance, and trend tracking.
    Last updated
    MIT

  • mcp-hayabusa

    chiomao23
    F
    license
    -
    quality
    C
    maintenance
    Enables EVTX (Windows Event Log) analysis via Hayabusa, providing tools to scan event logs and retrieve detection rules.
    Last updated
  • ODEI MCP Server by odei-ai

    ODEI MCP Serverofficial

    odei-ai
    F
    license
    A
    quality
    C
    maintenance
    Provides access to ODEI's constitutional knowledge graph, AI safety guardrails, and EVM smart contract auditing tools. It enables users to query structured domain nodes, validate agent actions, and perform security audits directly through an MCP client.
    Last updated
    4

  • Vulnerability Registry MCP

    orcohen5
    A
    license
    A
    quality
    D
    maintenance
    An MCP server that exposes a legacy vulnerability database as tools for LLM clients, enabling security analysts to query vulnerabilities using natural language through six specialized tools for vendor lookup, vulnerability search, and risk analysis.
    Last updated
    6
    MIT

  • PR Guardian MCP

    maiv3n
    A
    license
    A
    quality
    C
    maintenance
    Analyzes GitHub Pull Request diffs for security vulnerabilities and data leaks, using a deterministic filter to skip trivial changes and an AI-powered analysis for logic changes.
    Last updated
    1
    MIT

  • Dangerous MCP

    ShaojieJiang
    A
    license
    A
    quality
    C
    maintenance
    A demonstration server that reveals security risks by accessing sensitive environment variables, illustrating how MCP tools can potentially leak user data without explicit consent.
    Last updated
    1
    8
    MIT

  • OpenCTI MCP Server

    zxzinn
    A
    license
    A
    quality
    D
    maintenance
    A Model Context Protocol server that facilitates integration with OpenCTI, allowing users to query and retrieve cyber threat intelligence data via a standardized interface.
    Last updated
    16
    39
    MIT