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Time and timezone conversion capabilities for AI assistants.

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The Notion MCP Server is the official integration from Notion that connects AI assistants directly to your Notion workspace via the Notion REST API. With 3,500+ GitHub stars, it is the canonical MCP tool for bringing Notion's knowledge management capabilities into Claude Desktop, Cursor, Windsurf, and any MCP-compatible client. The server exposes a rich set of tools: search your entire workspace by keyword and return matching pages and databases; retrieve full page content and block trees; create new pages inside any parent page or workspace section; update, append, or delete block content on existing pages; list all databases your integration has access to; query database entries with filter and sort parameters; retrieve individual blocks or nested children by block ID; and add comments to pages. Authentication uses a Notion integration token — create an internal integration at notion.so/my-integrations, share specific pages or databases with it, and set NOTION_API_KEY in your environment. Install with a single npx command. The Notion MCP Server is especially powerful for AI workflows that span documentation retrieval, project planning, and knowledge capture — Claude can read product specs from Notion, draft new pages from conversation output, log structured data into databases, and search across thousands of notes without any manual copy-paste.

The Linear MCP server connects your AI assistant directly to Linear's project management platform via an officially hosted remote endpoint at mcp.linear.app — no local installation required. This is Linear's own first-party server, authenticated with OAuth 2.1 and centrally managed so you always run the latest version without updates. Available tools let you search issues by keyword, team, cycle, or filter; create new issues with title, description, and assignee; update status, priority, labels, and comments; and navigate Linear's project and cycle structure. In Claude Code, add it with: `claude mcp add --transport http linear-server https://mcp.linear.app/mcp`, then run /mcp to complete the OAuth flow. For older clients, use the mcp-remote bridge for backwards compatibility. Claude Desktop and Claude.ai users can connect via Settings > Connectors. Cursor and Codex have native support via their MCP config. Linear is used by thousands of engineering and product teams to plan, track, and ship software — the Linear MCP server brings that data into every AI-powered workflow without copy-paste or context-switching.

The HubSpot MCP Server is HubSpot's official Model Context Protocol integration, giving AI assistants direct read and write access to your CRM data — contacts, companies, deals, tickets, and pipelines — without leaving your conversation. Built and maintained by HubSpot, the server connects to the HubSpot APIs using your private app access token and exposes tools that let Claude search contacts by email or name, retrieve company records, create and update deal stages, log notes on CRM objects, list pipeline stages, and query ticket queues. This eliminates the round-trip of switching tabs to look up a contact or manually log an interaction. Setup requires a HubSpot account with a Private App — create one at app.hubspot.com/private-apps, grant the scopes your workflow needs (contacts read/write, crm.objects.deals, crm.objects.tickets), and copy the generated access token into your environment as HUBSPOT_ACCESS_TOKEN. Once connected, Claude can power CRM workflows like: "Find all contacts at Acme Corp and list their recent activity," "Create a new deal in the Prospecting stage for $15,000," or "Log a meeting note on this contact." The server supports Claude Desktop, Cursor, Windsurf, Cline, and any MCP-compatible client. It is especially valuable for sales, RevOps, and support teams who want AI-assisted CRM work without manual data entry or tab-switching.

The MongoDB MCP server is the official Model Context Protocol integration from MongoDB, giving AI assistants conversational access to both MongoDB Community Server and MongoDB Atlas cloud databases. With this MCP server, developers can ask Claude, Cursor, or Windsurf to query collections with natural-language filters that translate to MongoDB query syntax, run aggregation pipelines for analytics, insert and update documents, inspect collection schemas and index definitions, list databases and collections, and even manage Atlas clusters — all without leaving the AI interface. Common workflows include debugging slow queries by asking the AI to explain query plans, generating sample data for development environments, building dynamic dashboards by asking Claude to aggregate and summarize collection data, and automating routine maintenance like dropping orphaned indexes or counting documents matching conditions. The server works with MongoDB Atlas (via Atlas connection string) and self-hosted MongoDB 4.4+ instances. Authentication uses a standard MongoDB URI. Install with: `npx mongodb-mcp-server`. Compatible with Claude Desktop, Cursor, VS Code, Windsurf, and all MCP-compliant clients. With official backing from the MongoDB team and strong community adoption, this is the definitive MCP server for MongoDB AI integration.