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20 Best Email MCP Servers: compared and ranked, September 2026Ranked from 2,467 matching servers on stars, growth, downloads and maintenance. Updated .

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  • F
    license
    Not graded
    quality
    B
    maintenance
    Enables natural-language queries about sales metrics, returning interactive charts inline in chat via MCP Apps with a markdown fallback for unsupported hosts.
    -
  • A
    license
    A
    quality
    B
    maintenance
    diagramzu-mcp lets an AI client (Claude, Cursor, ChatGPT, etc.) author Mermaid diagrams in a shared workspace that a team can read, comment on, embed, and present at a clean URL — rather than just generating a one-off diagram. Hosted endpoint https://mcp.diagramzu.ai/mcp or local npx -y @diagramzu/mcp. Also listed in the official MCP registry as ai.diagramzu/mcp.
    14
    12 npm
    1
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    MCP server that lets Claude, Cursor, or any MCP-compatible client drive Sheepit projects — enabling campaign management, destination configuration, dashboard creation, and insights queries directly from a chat interface.
    40
    8 npm
    1
    MIT
  • F
    license
    A
    quality
    B
    maintenance
    A lightweight MCP server for managing personal finances locally. It allows users to log transactions, view summaries, manage categories, and interact with their budget via any MCP-compatible LLM client.
    12
    -
  • A
    license
    C
    quality
    C
    maintenance
    Enables evidence-backed business decisions by connecting questions to experiment and metric data, applying statistical analyses, and producing rollout, hold, or investigate verdicts with reproducible audit traces.
    500
    MIT
  • A
    license
    Not graded
    quality
    B
    maintenance
    Enables MCP-compatible agents to render privacy-first, deterministic Chart.js charts locally as PNG, SVG, PDF, or JSON, with configurable Sotheby's-inspired editorial themes per session.
    MIT
  • A
    license
    Not graded
    quality
    B
    maintenance
    Enables AI assistants to generate and render individual and composite Human Design charts, explore authorized chart and library data, and manage account usage and Website Builder projects with secure OAuth and entitlement filtering.
    1
    MIT
  • A
    license
    Not graded
    quality
    C
    maintenance
    Exposes tools and resources for human-supervised geological modelling from borehole data, including validation, 3D implicit model construction with GemPy, and uncertainty analysis, with a deterministic audit trail.
    MIT
  • A
    license
    Not graded
    quality
    D
    maintenance
    An MCP server for interacting with Microsoft PowerBI REST API, providing tools for data cleaning, transformation, analysis, and visualization within PowerBI.
    4
    MIT
  • A
    license
    Not graded
    quality
    B
    maintenance
    An MCP server that generates and manages nifdi diagrams as SVG files, bundled with skills that teach models in depth, placement grammar, and build workflow through natural language.
    Apache 2.0
  • A
    license
    Not graded
    quality
    B
    maintenance
    Enables local AI assistants to inspect Windows disk usage with treemap and folder X-ray views, retrieve cleanup previews, and receive application removal guidance, while exposing only non-destructive commands through MCP.
    MIT
  • A
    license
    Not graded
    quality
    B
    maintenance
    A virtual statistician MCP server that provides real statistical methods—design of experiments, hypothesis testing, regression, SPC, MSA—via tested Python libraries, with plain-language interpretations and plotted outputs.
    MIT
  • A
    license
    Not graded
    quality
    F
    maintenance
    Enables connecting to any SQL database, exploring schemas, running queries, and visualizing results with interactive charts from Claude Desktop.
    MIT