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20 Best Email MCP Servers: compared and ranked, September 2026Ranked from 2,412 matching servers on stars, growth, downloads and maintenance. Updated .

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"Integrating Claude AI with Microsoft Outlook" matching MCP servers:

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    Enables searching for relevant tables and retrieving data from Microsoft Sentinel's data lake using natural language, supporting security hunting scenarios like password-spray detection and impossible travel checks.
    2
    MIT
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    maintenance
    Enables an AI agent to send or draft email as the signed-in user through Microsoft Graph, including multiple recipients, HTML or plain-text bodies, and file attachments. Uses delegated least-privilege PKCE authentication so messages can be staged as drafts for approval or sent directly.
    MIT
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    Brings Outlook.com Smart Network Data Services (SNDS) API into MCP clients, allowing users to query IP reputation data such as volume, complaint rates, and spam verdicts using natural language.
    6
    MIT
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    Encrypted token store for Claude Code sessions, providing MCP tools for secure secret management with macOS Keychain integration, per-project allowlists, and native dialog input.
    6
    34 npm
    6
    Cryptographic Autonomy 1.0 (Combined Work Exception)
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    Implements a secure MCP server with API Key and JWT authentication, providing tools like echo, login, secure_action, and admin_action. Includes MCP Inspector integration for testing and debugging.
    1
    3
    MIT
  • A
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    Deterministic pre-execution safety certification for autonomous AI agents. Evaluates proposed actions across scope, reversibility, and sensitivity constraints — returns Certified, Warning, Escalate, or Blocked decisions with cryptographic audit trails. 3 tools: certify_action, check_budget, get_certification_history. Built on the QAE Safety Kernel (Rust + PyO3 bindings, pip install qae-safety).
    3
    1
    Apache 2.0
  • A
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    A
    quality
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    Zero-knowledge proof generation MCP server. AI agents can prove identity claims (Coinbase KYC, Country, Google OIDC, Google Workspace, Microsoft 365) without revealing personal data. Runs in AWS Nitro Enclave TEE with x402 USDC payments.
    8
    MIT
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    MCP server for AI-driven VAPT orchestration, enabling agents to plan and execute authorized security scans through a control plane that enforces scope, sanitization, budget, rate limits, human approval, and audit logging.
    127
    MIT
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    quality
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    Connects AI assistants to the Vectra AI security platform to enable intelligent analysis of threat detection data and automated incident response workflows. It allows users to investigate threats, take response actions, and generate security reports using natural language.
    23
    6
    MIT
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    Enables detection of AI-generated content from ChatGPT, GPT-4, and Gemini models through the BACH AI Content Detector API.
    1
    MIT
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    Enables AI agents to operate through a local, signed boundary that blocks prompt injection and secret leakage, verifies outputs, preserves cross-session memory, and provides offline-verifiable receipts. It also exposes 900+ MCP tools for discoverable agent actions.
    7
    MIT
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    C
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    A multi-agent AI security layer that protects LLMs from prompt injection, jailbreaks, and policy violations via MCP tools.
    33 PyPI
    MIT
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    A secure MCP server that allows Claude to read and write local files on your machine with explicit approval gating for each access.
    MIT
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    A
    maintenance
    An MCP server that provides tools for deterministic EU AI Act risk classification and documentation generation, enabling human-in-the-loop AI system assessments inside Claude Code.
    57 PyPI
    1
    MIT