Tomba MCP

Tomba, your unique B2B email finder and verifier, provides a distinctive lead database for effortless and effective outreach scaling.

GitHub

Tomba.io MCP Server

A Model Context Protocol (MCP) server for integrating with the Tomba.io API. This server provides comprehensive email discovery, verification, and enrichment capabilities through a standardized MCP interface.

Features

Tools (12 available)

Resources (7 available)

  • tomba://api/status - API status and account info
  • tomba://domain/{domain} - Domain information
  • tomba://email/{email} - Email information
  • tomba://similar/{domain} - Similar domains analysis
  • tomba://technology/{domain} - Technology stack information
  • tomba://docs/api - API documentation
  • tomba://docs/tools - Tools documentation

Prompts (16 pre-built workflows)

  • find_contact - Find complete contact info for a person
  • verify_email_list - Batch verify email addresses
  • research_company - Research company contacts and structure
  • enrich_lead - Enrich a lead with all available data
  • find_journalists - Find journalist contacts from articles
  • finder_phone - Find phone numbers for contacts
  • validate_phone - Validate a phone number
  • competitor_analysis - Analyze competitors using similar domains and technology
  • technology_audit - Comprehensive technology audit of a website
  • domain_insights - Get comprehensive insights about a domain including email count and technology
  • bulk_domain_research - Research multiple domains for email counts and basic information
  • find_target_companies - Find companies with advanced filters (size, type, revenue, industry)
  • market_research - Research companies in a market segment with comprehensive filtering
  • lead_generation - Generate leads by finding companies and their contacts
  • prospect_enrichment - Enrich company prospects with comprehensive data
  • industry_analysis - Analyze companies within an industry with detailed segmentation

Filter Options for Company Search Prompts

FilterAvailable Values
Size1-10 (Micro), 11-50 (Small), 51-250 (Mid-sized), 251-1K (Medium-large), 1K-5K (Large), 5K-10K (Very large), 10K-50K (Enterprise), 50K-100K (Massive), 100K+ (Global)
Typeeducation, government, nonprofit, private, public, personal
Revenue$0-$1M, $1M-$10M, $10M-$50M, $50M-$100M, $100M-$250M, $250M-$500M, $500M-$1B, $1B-$10B, $10B+
IndustryBased on LinkedIn Industry Codes V2 (140+ industries including Computer Software, Financial Services, Hospital & Health Care, etc.)

Transport Options

  • stdio - Standard input/output (default, for Claude Desktop)
  • http - HTTP server with REST endpoints

Installation

Prerequisites

  • Node.js 18 or higher
  • npm or yarn
  • Tomba API account (Sign up here)

Screenshots

Screenshot 1 Screenshot 2 Screenshot 3 Screenshot 4 Screenshot 5

Option 1: Install via NPX (Recommended)

The easiest way to use the Tomba MCP server is via npx, which doesn't require cloning the repository:

macOS/Linux

Add to your claude_desktop_config.json (~/Library/Application Support/Claude/claude_desktop_config.json):

{
    "mcpServers": {
        "tomba": {
            "command": "npx",
            "args": ["-y", "tomba-mcp-server"],
            "env": {
                "TOMBA_API_KEY": "your-api-key-here",
                "TOMBA_SECRET_KEY": "your-secret-key-here"
            }
        }
    }
}

Windows

Add to your claude_desktop_config.json (%APPDATA%\Claude\claude_desktop_config.json):

{
    "mcpServers": {
        "tomba": {
            "command": "npx",
            "args": ["-y", "tomba-mcp-server"],
            "env": {
                "TOMBA_API_KEY": "your-api-key-here",
                "TOMBA_SECRET_KEY": "your-secret-key-here"
            }
        }
    }
}

Note: The -y flag automatically accepts the installation prompt, and npx will always fetch the latest version.

Option 2: Install from Source

If you want to modify the server or contribute to development:

# Clone the repository
git clone https://github.com/tomba-io/tomba-mcp-server.git
cd tomba-mcp-server

# Install dependencies
yarn install

# Build the project
yarn build

Configuration

Claude Desktop Setup

To use this server with Claude Desktop, add the configuration to your claude_desktop_config.json file.

Using NPX (Recommended)

This method automatically uses the latest published version:

macOS/Linux (~/Library/Application Support/Claude/claude_desktop_config.json):

{
    "mcpServers": {
        "tomba": {
            "command": "npx",
            "args": ["-y", "tomba-mcp-server"],
            "env": {
                "TOMBA_API_KEY": "your-api-key-here",
                "TOMBA_SECRET_KEY": "your-secret-key-here"
            }
        }
    }
}

Windows (%APPDATA%\Claude\claude_desktop_config.json):

{
    "mcpServers": {
        "tomba": {
            "command": "npx",
            "args": ["-y", "tomba-mcp-server"],
            "env": {
                "TOMBA_API_KEY": "your-api-key-here",
                "TOMBA_SECRET_KEY": "your-secret-key-here"
            }
        }
    }
}

Using Local Installation

If you've built from source, use the absolute path to your installation:

macOS/Linux:

{
    "mcpServers": {
        "tomba": {
            "command": "node",
            "args": ["/ABSOLUTE/PATH/TO/tomba-mcp-server/server/index.js"],
            "env": {
                "TOMBA_API_KEY": "your-api-key-here",
                "TOMBA_SECRET_KEY": "your-secret-key-here"
            }
        }
    }
}

Windows:

{
    "mcpServers": {
        "tomba": {
            "command": "node",
            "args": [
                "C:\\ABSOLUTE\\PATH\\TO\\tomba-mcp-server\\server\\index.js"
            ],
            "env": {
                "TOMBA_API_KEY": "your-api-key-here",
                "TOMBA_SECRET_KEY": "your-secret-key-here"
            }
        }
    }
}

Important Notes:

  • Replace your-api-key-here and your-secret-key-here with your actual Tomba API credentials
  • For local installation, replace /ABSOLUTE/PATH/TO/tomba-mcp-server with the full path to your installation directory
  • Restart Claude Desktop after updating the configuration

Getting Tomba API Credentials

  1. Visit https://tomba.io
  2. Sign up for an account or log in
  3. Navigate to your dashboard
  4. Go to API settings
  5. Copy your API Key and Secret Key

Alternative: Using HTTP Transport

For HTTP transport with npx:

{
    "mcpServers": {
        "tomba": {
            "command": "npx",
            "args": [
                "-y",
                "tomba-mcp-server",
                "--transport",
                "http",
                "--port",
                "3000"
            ],
            "env": {
                "TOMBA_API_KEY": "your-api-key-here",
                "TOMBA_SECRET_KEY": "your-secret-key-here"
            }
        }
    }
}

For HTTP transport with local installation:

{
    "mcpServers": {
        "tomba": {
            "command": "node",
            "args": [
                "/ABSOLUTE/PATH/TO/tomba-mcp-server/server/index.js",
                "--transport",
                "http",
                "--port",
                "3000"
            ],
            "env": {
                "TOMBA_API_KEY": "your-api-key-here",
                "TOMBA_SECRET_KEY": "your-secret-key-here"
            }
        }
    }
}

Usage

Command-line Options

Usage: tomba-mcp-server [options]

Options:
  --transport <type>    Transport type: 'stdio' or 'http' (default: stdio)
  --port <number>       Port number for HTTP transport (default: 3000)
  --help                Show help message

Environment Variables:
  TOMBA_API_KEY         Your Tomba API key (required)
  TOMBA_SECRET_KEY      Your Tomba secret key (required)

Examples:
  # Run with stdio transport (default)
  node server/index.js

  # Run with HTTP transport on default port (3000)
  node server/index.js --transport http

  # Run with HTTP transport on custom port
  node server/index.js --transport http --port 8080

Standalone HTTP Server

You can also run the server as a standalone HTTP service:

export TOMBA_API_KEY="your-api-key"
export TOMBA_SECRET_KEY="your-secret-key"
node server/index.js --transport http --port 3000

HTTP API Endpoints

  • POST /mcp - Send JSON-RPC requests
  • GET /mcp - Server-Sent Events for notifications (requires X-Session-Id header)
  • DELETE /mcp - Terminate a session (requires X-Session-Id header)
  • GET /health - Health check endpoint
  • GET /sessions - List active sessions (requires authentication)

Example HTTP Request

curl -X POST http://localhost:3000/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "tools/call",
    "params": {
      "name": "email_finder",
      "arguments": {
        "domain": "stripe.com",
        "firstName": "Patrick",
        "lastName": "Collison"
      }
    },
    "id": 1
  }'

🔧 Development

Development Commands

# Run in development mode
yarn dev

# Build the project
yarn build

# Run tests
yarn test

# Run tests in watch mode
yarn test:watch

# Run tests with coverage
yarn test:coverage

# Lint code
yarn lint

# Fix linting errors
yarn lint:fix

🔍 Debugging & Testing

MCP Inspector (Recommended)

The easiest way to test and debug your MCP server:

# Build and launch MCP Inspector
yarn debug

This opens a web interface where you can:

  • 📋 View all available tools
  • 🧪 Test tools interactively
  • 📊 Inspect requests/responses
  • 🐛 Debug in real-time

Alternative Debug Methods

# Debug TypeScript directly
yarn debug:dev

# Run integration tests
yarn test:integration

# Manual testing
yarn build
echo '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' | node server/index.js

VS Code Debugging

If using VS Code, use the included debug configurations:

  • Debug MCP Server: Debug the compiled JavaScript
  • Debug TypeScript: Debug TypeScript source directly
  • Debug with Inspector: Debug with MCP Inspector
  • Run Tests: Debug Jest tests

See DEBUG_GUIDE.md for comprehensive debugging instructions.

🧪 Testing Individual Tools

1. Domain Search

Search for email addresses associated with a domain name.

{
    "name": "domain_search",
    "arguments": {
        "domain": "tomba.io",
        "limit": 10,
        "page": 1
    }
}

Response:

{
  "data": {
    "organization": {
      "website_url": "tomba.io",
      "organization": "Tomba technology web service LLC",
      "location": {
        "country": "US",
        "city": "Claymont",
        "state": "Delaware",
        "street_address": "1228 claymont",
        "postal_code": "19703"
      },
      "social_links": {
        "twitter_url": "https://twitter.com/tombaplatforum",
        "facebook_url": "https://www.facebook.com/tombaplatforum",
        "linkedin_url": "https://www.linkedin.com/company/tomba-io"
      },
      "disposable": false,
      "webmail": false,
      "phone_number": "(850) 790-5575",
      "industries": "Information Technology and Services",
      "founded": "2021",
      "company_size": "1-10",
      "company_type": "privately held",
      "revenue": "$0-$1M",
      "accept_all": false,
      "description": "the most powerful email-finding tool which is able to list all the email addresses of people who are working in a particular company.",
      "pattern": "{l}.{first}",
      "total_similar": 35,
      "keywords": [
        "lead generation software"
      ],
      "ranking": 661495,
      "whois": {
        "registrar_name": "namecheap, inc.",
        "created_date": "2020-07-07T20:54:07+02:00",
        "referral_url": "https://www.namecheap.com/"
      },
      "last_updated": "2025-09-06T00:22:01+02:00"
    },
    "emails": [
      {
        "email": "b.mohamed@tomba.io",
        "first_name": "Mohamed",
        "last_name": "Ben rebia",
        "full_name": "Mohamed Ben rebia",
        "gender": "male",
        "phone_number": false,
        "type": "personal",
        "country": "DZ",
        "position": "CEO",
        "department": "executive",
        "seniority": "senior",
        "twitter": null,
        "linkedin": "https://www.linkedin.com/in/mohamed-ben-rebia",
        "score": 100,
        "verification": {
          "date": "2025-09-22T00:00:00+02:00",
          "status": "valid"
        },
        "sources": [
          {
            "uri": "https://github.com/tomba-io/generic-emails/blob/084fc1a63d3cdaf9a34f255bedc2baea49a8e8b9/src/lib/validation/hash.ts",
            "website_url": "github.com",
            "extracted_on": "2021-02-08T20:09:54+01:00",
            "last_seen_on": "2021-02-08T22:43:40+01:00",
            "still_on_page": true
          },
          ....
        ]
      },
      ...
      ...
      ...
      ...
      ...
    ]
  },
  "meta": {
    "total": 21,
    "pageSize": 10,
    "current": 1,
    "total_pages": 3,
    "params": {
      "domain": "tomba.io",
      "page": 1,
      "limit": 10,
      "department": null,
      "country": null,
      "type": "all",
      "live": false
    }
  }
}

2. Email Finder

Generate likely email addresses from domain, first name, and last name.

{
    "name": "email_finder",
    "arguments": {
        "domain": "example.com",
        "firstName": "John",
        "lastName": "Doe"
    }
}

Response:

{
    "data": {
        "email": "b.mohamed@tomba.io",
        "first_name": "Mohamed",
        "last_name": "Ben rebia",
        "full_name": "Mohamed Ben rebia",
        "website_url": "tomba.io",
        "company": "Tomba technology web service LLC",
        "position": "CEO",
        "country": "DZ",
        "gender": "male",
        "twitter": null,
        "linkedin": "https://www.linkedin.com/in/mohamed-ben-rebia",
        "score": 100,
        "accept_all": null,
        "phone_number": false,
        "verification": {
            "date": "2025-09-22T00:00:00+02:00",
            "status": "valid"
        },
        "sources": [
            {
                "uri": "https://github.com/tomba-io/generic-emails/blob/084fc1a63d3cdaf9a34f255bedc2baea49a8e8b9/src/lib/validation/hash.ts",
                "website_url": "github.com",
                "extracted_on": "2021-02-08T20:09:54+01:00",
                "last_seen_on": "2021-02-08T22:43:40+01:00",
                "still_on_page": true
            }
        ]
    }
}

3. Email Verifier

Verify email address deliverability and check database presence.

{
    "name": "email_verifier",
    "arguments": {
        "email": "b.mohamed@tomba.io"
    }
}

Response:

{
    "data": {
        "email": {
            "email": "b.mohamed@tomba.io",
            "result": "deliverable",
            "status": "valid",
            "score": 99,
            "smtp_provider": "Google Workspace",
            "mx": {
                "records": [
                    "aspmx.l.google.com",
                    "alt2.aspmx.l.google.com",
                    "alt1.aspmx.l.google.com",
                    "alt4.aspmx.l.google.com",
                    "alt3.aspmx.l.google.com"
                ]
            },
            "mx_check": true,
            "smtp_server": true,
            "smtp_check": true,
            "accept_all": false,
            "greylisted": false,
            "block": true,
            "gibberish": false,
            "disposable": false,
            "webmail": false,
            "regex": true,
            "whois": {
                "registrar_name": "namecheap, inc.",
                "referral_url": "https://www.namecheap.com/",
                "created_date": "2020-07-07T20:54:07+02:00"
            }
        },
        "sources": [
            {
                "uri": "https://github.com/tomba-io/generic-emails/blob/084fc1a63d3cdaf9a34f255bedc2baea49a8e8b9/src/lib/validation/hash.ts",
                "website_url": "github.com",
                "extracted_on": "2021-02-08T20:09:54+01:00",
                "last_seen_on": "2021-02-08T22:43:40+01:00",
                "still_on_page": true
            }
        ]
    }
}

4. Email Enrichment

Enrich an email address with additional contact information.

{
    "name": "email_enrichment",
    "arguments": {
        "email": "b.mohamed@tomba.io"
    }
}

Response:

{
    "data": {
        "email": "b.mohamed@tomba.io",
        "first_name": "Mohamed",
        "last_name": "Ben rebia",
        "full_name": "Mohamed Ben rebia",
        "website_url": "tomba.io",
        "company": "Tomba technology web service LLC",
        "position": "CEO",
        "country": "DZ",
        "gender": "male",
        "twitter": null,
        "linkedin": "https://www.linkedin.com/in/mohamed-ben-rebia",
        "score": 100,
        "accept_all": null,
        "phone_number": false,
        "verification": {
            "date": "2025-09-22T00:00:00+02:00",
            "status": "valid"
        },
        "sources": [
            {
                "uri": "https://github.com/tomba-io/generic-emails/blob/084fc1a63d3cdaf9a34f255bedc2baea49a8e8b9/src/lib/validation/hash.ts",
                "website_url": "github.com",
                "extracted_on": "2021-02-08T20:09:54+01:00",
                "last_seen_on": "2021-02-08T22:43:40+01:00",
                "still_on_page": true
            }
        ]
    }
}

5. Author Finder

Find email addresses of article authors from a URL.

{
    "name": "author_finder",
    "arguments": {
        "url": "https://example.com/article"
    }
}

Response:

{
    "data": {
        "email": "b.mohamed@tomba.io",
        "first_name": "Mohamed",
        "last_name": "Ben rebia",
        "full_name": "Mohamed Ben rebia",
        "website_url": "tomba.io",
        "company": "Tomba technology web service LLC",
        "position": "CEO",
        "country": "DZ",
        "gender": "male",
        "twitter": null,
        "linkedin": "https://www.linkedin.com/in/mohamed-ben-rebia",
        "score": 100,
        "accept_all": null,
        "phone_number": false,
        "verification": {
            "date": "2025-09-22T00:00:00+02:00",
            "status": "valid"
        },
        "sources": [
            {
                "uri": "https://github.com/tomba-io/generic-emails/blob/084fc1a63d3cdaf9a34f255bedc2baea49a8e8b9/src/lib/validation/hash.ts",
                "website_url": "github.com",
                "extracted_on": "2021-02-08T20:09:54+01:00",
                "last_seen_on": "2021-02-08T22:43:40+01:00",
                "still_on_page": true
            }
        ]
    }
}

6. LinkedIn Finder

Find email addresses from LinkedIn profile URLs.

{
    "name": "linkedin_finder",
    "arguments": {
        "url": "https://linkedin.com/in/johndoe"
    }
}

Response:

{
    "data": {
        "email": "b.mohamed@tomba.io",
        "first_name": "Mohamed",
        "last_name": "Ben rebia",
        "full_name": "Mohamed Ben rebia",
        "website_url": "tomba.io",
        "company": "Tomba technology web service LLC",
        "position": "CEO",
        "country": "DZ",
        "gender": "male",
        "twitter": null,
        "linkedin": "https://www.linkedin.com/in/mohamed-ben-rebia",
        "score": 100,
        "accept_all": null,
        "phone_number": false,
        "verification": {
            "date": "2025-09-22T00:00:00+02:00",
            "status": "valid"
        },
        "sources": [
            {
                "uri": "https://github.com/tomba-io/generic-emails/blob/084fc1a63d3cdaf9a34f255bedc2baea49a8e8b9/src/lib/validation/hash.ts",
                "website_url": "github.com",
                "extracted_on": "2021-02-08T20:09:54+01:00",
                "last_seen_on": "2021-02-08T22:43:40+01:00",
                "still_on_page": true
            }
        ]
    }
}

7. Phone Finder

Search for phone numbers based on email, domain, or LinkedIn profile.

{
    "name": "phone_finder",
    "arguments": {
        "domain": "tomba.io"
    }
}

Response:

{
    "data": {
        "domain": "tomba.io",
        "valid": true,
        "local_format": "(850) 790-5575",
        "intl_format": "+1 850-790-5575",
        "e164_format": "+18507905575",
        "rfc3966_format": "tel:+1-850-790-5575",
        "country_code": "US",
        "line_type": "FIXED_LINE_OR_MOBILE",
        "carrier": "",
        "timezones": ["America/New_York"]
    }
}

8. Phone Validator

Validate phone numbers and check carrier information.

{
    "name": "phone_validator",
    "arguments": {
        "phone": "+213667945402"
    }
}

Response:

{
    "data": {
        "valid": true,
        "local_format": "0667 94 54 02",
        "intl_format": "+213 667 94 54 02",
        "e164_format": "+213667945402",
        "rfc3966_format": "tel:+213-667-94-54-02",
        "country_code": "DZ",
        "line_type": "MOBILE",
        "carrier": "Mobilis",
        "timezones": ["Europe/Paris"]
    }
}

9. Email Count

Get the total number of email addresses for a domain.

{
    "name": "email_count",
    "arguments": {
        "domain": "tomba.io"
    }
}

Response:

{
    "domain": "tomba.io",
    "total": 245,
    "personalEmails": 198,
    "genericEmails": 47,
    "department": {
        "engineering": 45,
        "sales": 38,
        "marketing": 32,
        "hr": 15,
        "finance": 12,
        "legal": 8,
        "executive": 25,
        "support": 28,
        "other": 42
    },
    "seniority": {
        "junior": 89,
        "senior": 125,
        "executive": 31
    },
    "source": "tomba_email_count"
}

10. Similar Finder

Find similar domains based on a specific domain.

{
    "name": "similar_finder",
    "arguments": {
        "domain": "tomba.io"
    }
}

Response:

{
    "data": [
        {
            "website_url": "summit.com",
            "name": "Summit",
            "industries": "Wholesale"
        },
        {
            "website_url": "hunter.io",
            "name": "Hunter",
            "industries": "Information Technology and Services"
        },
        {
            "website_url": "voilaNorbert.com",
            "name": "VoilaNorbert",
            "industries": "Information Technology and Services"
        }
    ]
}

11. Technology Finder

Instantly reveal the technology stack of any website.

{
    "name": "technology_finder",
    "arguments": {
        "domain": "tomba.io"
    }
}

Response:

{
    "domain": "tomba.io",
    "data": [
        {
            "slug": "intercom",
            "name": "Intercom",
            "icon": "Intercom.png",
            "website": "https://www.intercom.com",
            "categories": {
                "id": 10,
                "slug": "analytics",
                "name": "Analytics"
            }
        }
    ]
}

12. Companies Search

Search for companies using natural language queries with advanced filters including location, industry, size, and revenue.

{
    "name": "companies_search",
    "arguments": {
        "filters": {
            "location_city": {
                "include": ["san francisco"]
            },
            "industry": {
                "include": ["technology"]
            },
            "size": {
                "include": ["51-200", "201-500"]
            }
        },
        "page": 1,
        "limit": 10
    }
}

Response:

{
    "data": {
        "companies": [
            {
                "name": "Tech Company Inc",
                "domain": "techcompany.com",
                "industry": "Technology",
                "location": {
                    "city": "San Francisco",
                    "state": "California",
                    "country": "United States"
                },
                "size": "51-200",
                "revenue": "$10M-$50M"
            }
        ],
        "total": 150,
        "page": 1
    }
}

Available Filters:

  • location_city: Filter by city with include/exclude arrays
  • location_state: Filter by state with include/exclude arrays
  • location_country: Filter by country with include/exclude arrays
  • industry: Filter by industry (based on LinkedIn Industry Codes V2 - 140+ industries)
  • type: Filter by company type: education, government, nonprofit, private, public, personal
  • size: Filter by company size: 1-10, 11-50, 51-250, 251-1K, 1K-5K, 5K-10K, 10K-50K, 50K-100K, 100K+
  • revenue: Filter by revenue range: $0-$1M, $1M-$10M, $10M-$50M, $50M-$100M, $100M-$250M, $250M-$500M, $500M-$1B, $1B-$10B, $10B+
  • founded: Filter by founding year with include/exclude arrays
  • keywords: Filter by keywords with include/exclude arrays
  • sic: Filter by SIC codes with include/exclude arrays
  • naics: Filter by NAICS codes with include/exclude arrays
  • similar: Filter by similar domains with include/exclude arrays

Rate Limiting & Usage

API Rate Limits

Tomba.io implements rate limiting based on your subscription plan:

  • Free Plan: 50 requests per month
  • Growth Plan: 5,000 requests per month + 10,000 verifications requests
  • Pro Plan: 10,000 requests per month
  • Enterprise Plan: 50,000 requests per month
  • Custom Plan: Custom limits

Learn more about Tomba Pricing Plans.

Rate Limit Headers

Each API response includes rate limit information:

X-RateLimit-Limit: 1000
X-RateLimit-Remaining: 999
X-RateLimit-Reset: 1609459200

Learn more about Tomba API Rate Limits.

Handling Rate Limits

When you exceed your rate limit, the API returns a 429 Too Many Requests status with:

{
    "error": {
        "type": "rate_limit",
        "message": "Rate limit exceeded. Please try again in 60 seconds",
        "code": 429
    }
}

Best Practices

  1. Monitor Usage: Check your dashboard at tomba.io/dashboard
  2. Implement Backoff: Handle 429 responses with exponential backoff
  3. Batch Operations: Use domain search for multiple emails from the same domain
  4. Cache Results: Store results locally to avoid duplicate requests
  5. Plan Accordingly: Upgrade your plan based on usage patterns

Usage Tips

  • Domain search returns multiple emails per request (more efficient than individual lookups)
  • Email verification consumes credits only for valid email formats
  • Phone finder may return multiple numbers per request
  • Enrichment provides comprehensive data in a single request

Troubleshooting

Server Not Starting in Claude Desktop

  1. Check Node.js version: Ensure you have Node.js 18 or higher

    node --version

  2. Using NPX:

    • Ensure you have a stable internet connection for the first run
    • The -y flag should auto-accept the installation
    • NPX will cache the package after first use

  3. Using Local Installation:

    • Verify absolute path is correct in your config
    • Ensure server/index.js exists: ls -la server/index.js
    • Make sure you ran yarn build successfully

  4. Verify API credentials: Ensure your Tomba API keys are correct

  5. Check Claude logs:

    • macOS: ~/Library/Logs/Claude/mcp*.log
    • Windows: %APPDATA%\Claude\logs\mcp*.log

NPX-Specific Issues

"npx command not found":

  • Ensure npm is installed: npm --version
  • NPX comes with npm 5.2.0+, update if needed: npm install -g npm

Package not found:

  • Verify the package is published: npm view tomba-mcp-server
  • Try clearing npm cache: npm cache clean --force

Always downloading package:

  • This is normal behavior with -y flag
  • NPX caches the package after first download
  • For a permanent installation, use local installation method

Authentication Errors

  • Verify your API keys at https://app.tomba.io/dashboard
  • Ensure environment variables are properly set in the config
  • Check that your API subscription is active

Tools Not Responding

  • Check your Tomba API rate limits
  • Verify network connectivity
  • Review server logs for error messages

About Tomba

Founded in 2020, Tomba prides itself on being the most reliable, accurate, and in-depth source of email address data available anywhere. We process terabytes of data to produce our Email finder API.

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Contributing

  1. Fork it (https://github.com/tomba-io/tomba-mcp-server/fork)
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request

License

Please see the License file for more information.

Support

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