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20 Best GitHub MCP Servers: compared and ranked, October 2026Ranked from 1,788 matching servers on stars, growth, downloads and maintenance. Updated .

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  • A
    license
    Not graded
    quality
    C
    maintenance
    A clean-room SHARP-on-MCP compliant FHIR R4 MCP server that enables AI agents to interact with any FHIR R4 endpoint using SHARP context headers, without server-side OAuth. It provides clinical tools, lab results, imaging, and interactive MCP-UI dashboards.
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    Enables rendering, validation, formatting, and inspection of D2 diagrams via the Model Context Protocol, using WASM for rendering without requiring the d2 binary.
    6
    MIT
  • A
    license
    A
    quality
    A
    maintenance
    Renders word-sized charts — sparklines, bars, bullets and 100+ more types — to self-contained SVG with generated alt text, small enough to sit inline in a model's reply or a table cell. Three tools: find the right chart for a question, get its wiring, and render it.
    3
    4,334 npm
    201
    MIT
  • A
    license
    A
    quality
    F
    maintenance
    MCP server for AI Diagram Maker — generate software engineering diagrams from natural language, code, ASCII diagram, images, or Mermaid. Inline diagram rendering using MCP apps UI and diagram URL in responses. Works with Cursor, Claude Desktop, Claude Code, and any MCP-compatible AI.
    5
    45 npm
    10
    MIT
  • F
    license
    A
    quality
    D
    maintenance
    Enables LLMs to generate visual summary reports from CSV datasets using MCP Resources, Tools, and Prompts, without exposing raw data to the model.
    10
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  • F
    license
    A
    quality
    C
    maintenance
    An MCP server that lets Claude or ChatGPT read, create, and edit mind maps stored in a GitHub repository, with support for local and HTTP transport.
    8
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  • A
    license
    A
    quality
    C
    maintenance
    MCP server for romaco-charts. Control your trading chart from Claude, Cursor, or any MCP-compatible AI agent.
    27
    14 npm
    1
    Apache 2.0
  • A
    license
    A
    quality
    D
    maintenance
    MCP server for generating diagrams, charts, and visualizations using Gemini image generation on Vertex AI. Supports auto-detection of diagram types, multiple style modes, and iterative refinement.
    3
    10 npm
    1
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    Computes biorhythm values (physical, emotional, intellectual) and generates a PNG chart showing sine curves based on birth date and optional target date.
    1
    MIT
  • A
    license
    A
    quality
    C
    maintenance
    A graph layout server that computes node coordinates and edge paths from structure using elkjs, enabling agents to offload layout calculations without rendering.
    5
    6 npm
    Apache 2.0
  • A
    license
    A
    quality
    C
    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.
    19
    72 npm
    1
    MIT
  • F
    license
    A
    quality
    B
    maintenance
    Data-visualization MCP server for ROOT Workspace. It enables creating and iterating on charts (Vega-Lite, Python plots) with a persistent kernel and vision loop.
    8
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