"Free Network Graph Visualization Tools (No Account Required)" matching MCP servers:

Enables assistants and agents to query calendar availability from Google, Outlook, iCloud, or ICS feeds and return free time slots for specified days, date ranges, or pasted messages. It exposes read-only tools for finding availability and checking calendar readability without exposing calendar addresses.

Enables a model to call the Microsoft Graph API directly through nine verb-shaped tools with per-user on-behalf-of authentication, so users can read, create, update, delete, search, batch, upload, download, and resolve attachments without server-side business logic or allow-lists.

An MCP server for Microsoft Graph, exposing 60 tools across calendar, email, meetings, Teams chat, files, people, directory, tasks, and OneNote over stdio or Streamable HTTP.

Enables AI assistants to securely access your own Microsoft 365 data—Outlook mail and calendar, OneDrive, SharePoint, Teams chat, To Do, Planner, Entra ID, and Intune—through Microsoft Graph with delegated permissions.

Enables reading and editing Excel workbooks stored on SharePoint, OneDrive or Teams through Microsoft Graph without a browser, with every write starting as a dry run, checked against the version you read, and verified by reading the cells back. Includes device-code sign-in, workbook aliases, range filling, and dependency-free operation on Node 18+.

Enables AI assistants to interact with Microsoft 365 through the Microsoft Graph API, including searching Teams messages, managing chats, and sending messages.

Provides AI agents with secure, allowlisted access to Atlassian Teamwork Graph data (Jira, Confluence, and related services) via the twg CLI, enabling read and write operations over the Model Context Protocol.

Enables Claude to perform exact math, date and holiday calculations, CSV/SQLite/PDF and text processing, filesystem and system diagnostics, network requests, and ffmpeg-based media operations through small purpose-built tools.

Enables Claude to access and manage multiple Google accounts at once across Gmail, Calendar, Drive, Contacts, and Tasks, with unified search and document text extraction.

Enables natural-language discovery and execution of Microsoft Graph operations through a small fixed tool surface backed by a retrieval index, with per-user OAuth identity.

Enables to manage your Outlook mailbox via Microsoft Graph (write access) with delegated permissions, providing MCP tools to create, modify, and send emails, folders, categories, rules, and automatic replies.

Enables deterministic calculations for AI API and subscription costs, meeting time zones, recurring schedules, and cron next-run previews, returning normalized inputs, units, assumptions, dated sources, and links to results.

Enables Claude and Gemini to access and manage multiple Google accounts simultaneously across services such as Gmail, Drive, Calendar, YouTube, Sheets, Analytics, AdSense, and Fitness, with create, read, update, and delete operations. It runs locally without external intermediaries to keep account access private.

Enables a family assistant to search documents, inspect, fill, edit, and sign files, manage scheduled work and runs, and perform web searches, with each tool gated by the caller's groups.

MCP server for document conversion and processing, enabling AI assistants to handle various document formats.

MCP server that provides tools to control a server-owned Pomodoro timer, allowing focus, pause, resume, skip, reset, and stats operations.

Enables AI assistants to securely operate Microsoft 365 services, including Outlook email drafting/sending, Teams messaging, and user profile retrieval, through MCP over Streamable HTTP. Deployable on Google Cloud Run with managed authentication via Microsoft Entra ID.

Enables AI assistants to convert and process various document formats through an MCP server interface.

Enables delegated Microsoft Entra-authenticated access to Microsoft 365 user profile data, exposing read, capability, and description tools for AI assistants.

Generates PDF slide decks from Markdown using any MCP-compatible AI client. Free, no authentication, max 10 slides, output URL valid 90 days.

Provides task and project management tools for AI agents, including todo list management, prioritization frameworks like Eisenhower Matrix and RICE scoring, time estimation using PERT, daily standup generation, and sprint burndown calculation.

MCP server for accurately reading and writing Excel .xlsx files while preserving structure, styles, and formulas. Provides tools for inspecting, editing, and aggregating spreadsheet data, with optional LibreOffice recalculation.

Provides direct access to Microsoft Graph API with multi-tenant account management, allowing users to interact with Microsoft 365 services across multiple tenants through a single flexible graph-request tool.

Enables AI agents to read, write, and edit Office documents via LibreOffice with token-efficient design. Supports multiple formats including DOCX, XLSX, PPTX, and legacy formats through LibreOffice bridge.

Provides a read-only MCP interface to Kaiten, letting an agent retrieve cards, spaces, boards, columns, lanes, discussions, checklists, tags, custom properties, sprints and time-tracking reports with paging, filtering and long-text continuation. It also lists card and comment attachments and downloads selected originals as local files, with hashes and safe unique names, for further agent analysis.

Turns markdown the agent produced into a link that renders as a typeset, paginated document with tables, Mermaid and math. The document is encoded in the URL, so nothing is uploaded and no account is needed.

Enables AI agents to review, validate, and apply APA 7 formatting to Microsoft Word .docx documents, create or edit documents, and format or verify references in Spanish or English.

Enables Claude.ai and Claude Code to read and write a single Gmail mailbox, including search, drafts, sending, and label management.

Enables MCP clients to securely access and operate a Microsoft 365 tenant through the full Microsoft Graph API, covering mail, calendar, files, Teams, SharePoint, Planner, OneNote, Excel, admin, security, and more with 219 tools and guarded write capability.

Enables AI assistants to interact with Microsoft 365 services (users, mail, calendar, files) via Microsoft Graph API.

Provides read-only access to Microsoft 365 services including SharePoint, OneDrive, Outlook, Teams, and Calendar through the Microsoft Graph API, enabling users to search, browse, and retrieve content across their M365 suite.

Enables Claude Desktop to interact with multiple Gmail accounts via MCP, providing tools for sending, searching, reading, labeling, filtering, thread management, drafts, and attachments. It also ensures correct thread replies and recoverable deletes.

A comprehensive server that enables AI applications to interact with Microsoft 365 and Azure AD services through standardized Model Context Protocol interfaces.

Provides seamless integration with macOS native applications including Messages, Notes, Contacts, Mail, Reminders, Calendar, and Maps, enabling natural language control and automation of Apple ecosystem apps.

Enables AI assistants to read, create, edit Word/Excel/PPT files and manage the filesystem on the user's computer via natural language.

A tiny TypeScript wrapper that exposes five stdio MCP servers (Gmail, Calendar, Sheets, Docs, Drive) as Streamable HTTP endpoints, enabling a single Docker host to serve all Google services to any MCP client.

MCP server that provides document conversion and processing tools, enabling AI assistants to handle document formats through natural language.

A local MCP server that connects multiple Google accounts to Claude Desktop, enabling unified email search and send, calendar events, and full CRUD on Google Docs, Sheets, and Forms.

MCP server for Deckrun — generate presentation PDFs, narrated videos, and audio from Markdown. Built for AI agents and IDEs. Free tier: no API key required — generate PDFs instantly. Paid tier: set DECKRUN_API_KEY to unlock video, audio, and account tools.

Checks AI-written Japanese business text for double honorifics (二重敬語) and the honorific chains the 「敬語の指針」 guideline deems inappropriate, returning each offending span with its reason and suggested fix, and can rewrite the text with those fixes applied. Runs offline and read-only, so agents get the same deterministic answer on every pass.