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Scale Gymnasium provides 45+ MCP (Model Context Protocol) servers with over 300 tools for agent interactions. All servers operate offline with mock data, except for Brave Search which requires an API key and internet connection.

Server Categories

Local Custom Servers

31 custom-built Python/Typescript servers

Python Packages

6 open source PyPI packages

NPM Packages

6 open source Node.js packages

By Domain


Local Custom Servers

Custom-built MCP servers providing domain-specific functionality.
Calendar event management system with full CRUD operations for scheduling.Key Features:
  • Create, read, update, and delete calendar events
  • Search events by time range, tags, and keywords
  • Support for attendees, locations, and descriptions
  • Uses Unix timestamps with UTC timezone
Reminder management system with repetition support.Key Features:
  • Add reminders with due dates
  • Optional repetition intervals (second, minute, hour, day, week, month)
  • Automatic repetition generation (up to 12 weeks, max 100 repetitions)
Accounting system simulating QuickBooks functionality for financial record management.Key Features:
  • Manage invoices, bills, customers, and vendors
  • Account management and categorization
  • Search and filter capabilities
Customer Relationship Management system for managing contacts, companies, deals, leads, and engagements.Key Features:
  • Manage contacts and companies
  • Track deals through sales stages
  • Lead management with ratings (hot, warm, cold)
  • Record engagements (emails, calls, notes)
Deal Stages: appointmentscheduled, qualifiedtobuy, presentationscheduled, decisionmakerboughtin, contractsent, closedwon, closedlost
Contact management system for storing and retrieving personal and business contacts.Key Features:
  • Store contact information (name, email, phone, address)
  • Search contacts by various fields
  • Support for tags and metadata
Stock market information server providing S&P 500 company information and price history.Key Features:
  • S&P 500 ticker information (500+ companies)
  • Historical price data (OHLCV format)
  • 2 years of data (Oct 2023 - Oct 2025)
E-commerce platform for managing shopping carts and product catalogs.Key Features:
  • Product catalog with categories and variants
  • Shopping cart management
  • Order placement and tracking
  • Discount code support
Apartment rental search and management system.Key Features:
  • Search apartments by location, price, amenities
  • 103 apartments across 33 UK cities
  • Filter by bedrooms, bathrooms, square footage
Crime statistics API for UK postcodes with rate limiting.Key Features:
  • Query crime stats by postcode
  • 89 UK postcodes across 13 cities
  • API rate limiting (100 calls per 30 minutes)
System information and utility server.Key Features:
  • Get current date and time
  • Timezone conversions
  • System information
Email client for sending, receiving, and managing emails.Key Features:
  • Folder management (Inbox, Sent, Drafts, Trash)
  • Search, reply, and forward capabilities
  • Attachment support
Filesystem operations server for file and directory management.Key Features:
  • File CRUD operations
  • Directory listing and navigation
  • File search and metadata
Database system simulating Airtable’s functionality.Key Features:
  • Full CRUD on databases, tables, records
  • Dynamic field creation and schema management
  • Complex queries and filtering
Project management system simulating Linear’s issue tracking.Key Features:
  • Issue management with states
  • Projects and team organization
  • Comments and discussions
Issue States: backlog, todo, in-progress, done, cancelled
Workspace system replicating Notion’s pages and databases.Key Features:
  • Page hierarchy and navigation
  • Database management
  • Block-based content
  • Rich filtering and sorting
Customer support ticketing system.Key Features:
  • Ticket management with states and priorities
  • User roles (end-user, agent, admin)
  • Comments and conversation threads
  • Multi-channel support
Ticket States: new, open, pending, solved, closedPriorities: low, normal, high, urgent
Team communication platform with channels and messages.Language: TypeScript (Node.js)
Weather information service with forecasts and alerts.Language: TypeScript (Node.js)Key Features:
  • Current weather and 14+ day forecasts
  • Historical data, hourly data
  • Alerts, air quality, astronomy data
Vacation rental property search with dynamically generated listings.Key Features:
  • 147,000+ cities worldwide (dynamically generated)
  • Price calculation based on location and property type
  • Availability checking and guest validation
Optional search filters: checkin, checkout, adults, children, infants, pets, min_price, max_price, offset, limit
Flight search system with realistic routing and scheduling.Key Features:
  • One-way and round-trip searches
  • Cabin classes: economy, business, first
  • Dynamic pricing based on route
  • Most airports worldwide (dynamically generated)
Optional search_flights arguments: trip_type, return_date, passengers, cabin_class, carry_on_bag, checked_bags, offset, limit

Open Source Python Packages

Installed via PyPI and run using uvx.
Package: mcp-server-calculatorMathematical expression evaluator with operators, trigonometry, and logarithmic functions.Supports: +, -, *, /, ^, %, sin, cos, tan, log, exp, pi, e
Package: mcp-server-gitGit repository operations for version control management.Sample repos available at /data/repos/
Package: excel-mcp-serverExcel spreadsheet operations for .xlsx files.
Package: office-word-mcp-serverMicrosoft Word document operations for .docx files.
Package: office-powerpoint-mcp-serverPowerPoint presentation operations for .pptx files.
Package: cli-mcp-serverSafe command-line interface with restricted commands.Allowed Commands: ls, cat, findWorking Directory: /data

Open Source NPM Packages

Installed via npm and run using npx or node.
Package: @modelcontextprotocol/server-memoryKnowledge graph memory system for maintaining context.
Package: @geobio/code_execution_serverPython code execution with virtual environment isolation.Workspace: /data/repos/mcp_code_executor_workspace
Package: mcp-server-code-runnerMulti-language code execution.Supported: Python, JavaScript/Node.js, Shell
Package: @wonderwhy-er/desktop-commanderDesktop automation and system control.
Package: mongodb-mcp-serverMongoDB database operations and queries.Connection: mongodb://app_user:app_password@localhost:27017/video_game_store
Package: @modelcontextprotocol/server-brave-search
This is the only server that requires internet connectivity and an API key (BRAVE_API_KEY).

Next Steps

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