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What are MCP Servers?

MCP (Model Context Protocol) servers extend your AI assistant with specialized tools and capabilities. Each server provides focused functionality - from accessing documentation and databases to processing documents and analyzing data. Benefits:
  • Specialized Tools: Each server provides domain-specific capabilities
  • Easy Integration: Add servers to NimbleBrain Studio with one click
  • Natural Language: Control everything through conversation
  • Composable: Use multiple servers together for powerful workflows
All MCP servers work seamlessly in NimbleBrain Studio. Configure once, then interact naturally through conversation.

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Available Servers

Browse all available MCP servers alphabetically. Each server displays its category for easy reference.

Abstract API

Data IntelligenceComprehensive API suite for data enrichment, validation, and intelligence services.Tools: Email validation, IP geolocation, phone validation, company data

ClickHouse

Data AnalyticsHigh-performance analytics database access. Execute queries, analyze data, and generate insights.Tools: SQL execution, schema exploration, data analysis

DeepL

Language & TranslationHigh-quality neural machine translation supporting 30+ languages.Tools: Text translation, document translation, language detection

Echo

Development ToolsTest and debug MCP server connections. Perfect for development and troubleshooting.Tools: 2 basic tools for testing

Finnhub

FinanceReal-time stock data, company fundamentals, financial news, and market analysis.Tools: Stock quotes, company profiles, financials, news

GitHub

Development ToolsBrowse repositories, read code, search issues, and manage pull requests directly from your AI assistant.Tools: Repository access, code search, issue management

IPInfo

Data IntelligenceIP address intelligence and geolocation data. Identify locations, ISPs, ASNs, and more.Tools: IP lookup, geolocation, ISP data, ASN information

National Parks

Travel & RecreationExplore US National Parks with detailed information about parks, trails, campgrounds, and visitor centers.Tools: Park search, trail information, campground data

OpenWeatherMap

Weather & ClimateCurrent weather, forecasts, historical data, and air quality information for any location.Tools: Current weather, forecasts, air quality, weather maps

PDF.co

Document ProcessingComprehensive PDF toolkit with 18 tools for conversion, manipulation, security, OCR, barcodes, and watermarks.Tools: 18 tools across 6 categories

PostgreSQL

DatabasesIndustrial-strength database management with AI-powered natural language queries, intelligent index optimization, and comprehensive health monitoring.Tools: 9 tools for querying, optimization, and health checks

Ref

Development ToolsToken-efficient access to 1000+ documentation sites. 60-95% fewer tokens than traditional tools with session-aware de-duplication.Tools: Smart documentation search, URL-to-markdown conversion

Reverse Text

UtilitiesReverse text and get character/word statistics. Zero configuration, instant results, complete privacy.Tools: Text reversal, character counting

Tavily

Search & ResearchAI-powered web search optimized for LLMs. Real-time results, content extraction, web crawling, and site mapping.Tools: Search, extract, crawl, map

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Getting Started

1

Choose a Server

Browse the servers above and click on any that interest you. Each server page has detailed documentation about its capabilities.
2

Add to Studio

In NimbleBrain Studio:
  1. Navigate to MCP Servers in the sidebar
  2. Click Add Server or Browse Registry
  3. Search for your chosen server
  4. Click Add to Workspace
  5. Configure any required API keys or settings
3

Start Using

Open a playbook and start asking questions naturally. Your AI assistant will automatically use the appropriate server tools to help you.Example: “Search for React hooks documentation” (uses Ref)Example: “What’s the weather in San Francisco?” (uses OpenWeatherMap)
Many workflows benefit from using multiple servers together:
Servers: Ref + GitHub + PostgreSQLUse case: Build features with documentation lookup, code examples from repos, and database queriesExample:
1. "Search for Stripe payment intent documentation" (Ref)
2. "Show me payment processing code in our main repo" (GitHub)
3. "Create orders table schema in PostgreSQL" (PostgreSQL)
Servers: Tavily + Ref + ClickHouseUse case: Research topics, access technical documentation, and analyze dataExample:
1. "Research current trends in AI agents" (Tavily)
2. "Find LangChain documentation on agents" (Ref)
3. "Analyze our user engagement metrics" (ClickHouse)
Servers: PDF.co + DeepL + RefUse case: Process documents, translate content, and lookup technical specsExample:
1. "Extract text from this PDF invoice" (PDF.co)
2. "Translate the extracted text to Spanish" (DeepL)
3. "Search for invoice processing best practices" (Ref)
Servers: Abstract API + IPInfo + PostgreSQLUse case: Validate and enrich user data, store in databaseExample:
1. "Validate this email address" (Abstract API)
2. "Get geolocation for this IP" (IPInfo)
3. "Store validated user data in users table" (PostgreSQL)
Servers: Finnhub + Tavily + ClickHouseUse case: Track stocks, research companies, analyze financial dataExample:
1. "Get Tesla stock quote and fundamentals" (Finnhub)
2. "Research latest Tesla news and analyst opinions" (Tavily)
3. "Analyze our portfolio performance data" (ClickHouse)

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Server Categories

  • By Use Case
  • By Authentication
  • By Token Efficiency
Building Applications:
  • Ref (documentation)
  • GitHub (code examples)
  • PostgreSQL (database)
  • ClickHouse (analytics)
Content & Documents:
  • PDF.co (PDF processing)
  • DeepL (translation)
  • Reverse Text (text utilities)
Research & Information:
  • Tavily (web search)
  • Ref (technical docs)
  • Finnhub (financial data)
  • OpenWeatherMap (weather)
Data Validation:
  • Abstract API (validation & enrichment)
  • IPInfo (IP intelligence)

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Common Questions

Adding servers to Studio is simple:
  1. Click MCP Servers in the Studio sidebar
  2. Click Add Server or Browse Registry
  3. Search for the server you want
  4. Click Add to Workspace
  5. Configure any required settings (API keys, credentials)
  6. Click Save & Enable
The server is now available in all your playbooks!
It depends on the server:No API key needed:
  • Echo MCP Server
  • Reverse Text
Free API key available:
  • Ref (free tier with registration)
  • Tavily (1,000 requests/month free)
  • GitHub (free tier)
  • OpenWeatherMap (free tier)
Paid API key required:
  • PDF.co
  • Abstract API
  • IPInfo
  • Finnhub
  • DeepL
  • National Parks
Database credentials:
  • PostgreSQL
  • ClickHouse
Yes! This is one of the most powerful features of MCP servers.Your AI assistant will automatically choose the right server based on your request. You can seamlessly combine servers in a single conversation.Example:
You: "Search for Stripe API documentation"
AI: Uses Ref to find documentation

You: "Show me example code from our payments repo"
AI: Uses GitHub to find code examples

You: "Check our database for payment records"
AI: Uses PostgreSQL to query database
All in one natural conversation!
Studio shows you which tools are being called in real-time. You’ll see indicators like:
  • 🔧 Using ref_search_documentation
  • 🔧 Using github_read_file
  • 🔧 Using execute_sql
The AI assistant automatically selects the appropriate server based on your request. You don’t need to specify which server to use - just ask naturally!
There are several options:
  1. Check the MCP Registry: Browse https://github.com/modelcontextprotocol/servers for community servers
  2. Request a Server: Contact NimbleBrain support to request specific integrations
  3. Build Your Own: MCP servers are open source! You can build custom servers for your specific needs
  4. Use Generic Tools: Many tasks can be accomplished with existing servers like Tavily (web search), Ref (documentation), or GitHub (code access)
Usage limits and costs vary by server:Free Forever:
  • Echo, Reverse Text (unlimited)
Free Tiers:
  • Ref (unlimited with fair use)
  • Tavily (1,000 requests/month)
  • GitHub (rate limits apply)
  • OpenWeatherMap (60 calls/minute)
Credit/API-based:
  • PDF.co (credit per operation)
  • Abstract API (tiered monthly limits)
  • IPInfo (tiered pricing)
  • Finnhub (tiered pricing)
  • DeepL (character-based pricing)
Infrastructure:
  • PostgreSQL (your database costs)
  • ClickHouse (your database costs)
Check each server’s documentation page for detailed pricing information.

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Best Practices

Start Simple

Begin with one or two servers that match your immediate needs. Get comfortable with how they work before adding more.Recommended first servers:
  • Ref (for documentation)
  • Tavily (for web search)
  • PostgreSQL (if you use databases)

Configure Once, Use Everywhere

Set up your API keys and credentials once in Studio settings. They’ll work across all your playbooks automatically.Tip: Use environment variables for sensitive credentials.

Combine Servers

The real power comes from using multiple servers together. Research with Tavily, reference docs with Ref, store data with PostgreSQL.Think workflows, not individual tools.

Monitor Usage

Keep an eye on API usage for paid services. Most servers show usage in their dashboards.Set up alerts for approaching limits on critical services.

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Need Help?

Documentation

Detailed guides for each MCP server with examples, troubleshooting, and best practices.

Discord Community

Join our Discord to ask questions, share workflows, and learn from other users.

Support

Contact our support team for technical assistance and feature requests.
New servers added regularly! Check back often or follow our Discord for announcements about new MCP server integrations.