Tomba MCP Server

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 (28 available)

Email Discovery

• Domain Search: Find all email addresses associated with a domain
• Email Finder: Generate likely email addresses from names and domains
• Author Finder: Discover email addresses of article authors
• LinkedIn Finder: Find emails from LinkedIn profile URLs
• Email Count: Get total email counts for domains
• Email Sources: Find where an email address was found on the web
• Email Format: Get the email format patterns used by a domain

Verification

• Email Verifier: Verify email deliverability and check database presence

Enrichment

• Email Enrichment: Enrich emails with additional contact data
• Person Enrichment: Find person data by email (name, position, social profiles)
• Company Enrichment: Find company data by domain (industry, size, location)
• Combined Enrichment: Combined person + company enrichment by email

Phone

• Phone Finder: Search phone numbers by email, domain, or LinkedIn
• Phone Validator: Validate phone numbers and check carrier info

Domain Intelligence

• Domain Status: Check if a domain is webmail or disposable
• Autocomplete: Company name suggestions with logo and domain info
• Similar Finder: Find similar domains based on a target domain
• Technology Finder: Discover technology stacks used by websites
• Location: Get employees location count by country

Company Search

• Companies Search: Search for companies using natural language queries with advanced filters

Account & Management

• Account Info: Get current account information, plan, and credits
• Usage Info: Get API usage statistics across all endpoints
• List Flags: List submitted data flags with status and credit refunds
• Create Flag: Report incorrect data (hard bounces, invalid emails) for credit recovery
• List Leads: List leads with optional domain filter
• Create Lead: Add a new lead to a list
• List Keys: List API keys
• Get Logs: Get recent API request logs

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
• phone_finder - 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

Performance & Reliability

Timeout

All API calls have a 120-second timeout. Tomba searches run in real time against live infrastructure — response times vary with the target company's SMTP server speed, website responsiveness, and the depth of catch-all detection.

Retry with Exponential Backoff

All API calls automatically retry up to 3 times with exponential backoff on:

• 429 Too Many Requests (rate limit exceeded)
• 5xx server errors

Retry delays: 1s → 2s → 4s.

Rate Limits

Rate limits are enforced per endpoint and per plan:

No credits are charged when Tomba cannot provide a result. Duplicate requests within 30 days are not counted again.

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

Note: The npm package has been renamed from tomba-mcp-server to @tomba-io/tomba-mcp-server. Please update your configurations accordingly.

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-io/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-io/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

OpenClaw Skill

This repository includes workspace-local skills in skills/. The Cursor plugin (.cursor-plugin/plugin.json) loads them as well.

skills/tomba-contact-intelligence/SKILL.md is the main skill. It helps the agent pick the right Tomba MCP tools for contact discovery, company research, email verification, phone lookup, and prospect enrichment workflows.

Each MCP tool also has its own skill folder, skills/tomba-<tool-name>/SKILL.md. Each one covers the tool's inputs, workflow, expected output, and an example call:

To use it:

1. Open this repository as your OpenClaw workspace, or copy the skills/tomba-* directories you need into your OpenClaw skills directory.
2. Ensure the Tomba MCP server is configured and available to OpenClaw.
3. Start a new OpenClaw session so the skill is loaded.

Example prompts:

• "Find the best contact for partnerships at stripe.com and verify the email before you return it."
• "Research fintech companies in Germany, then identify likely sales contacts for the top matches."
• "Enrich this prospect with email, phone, company technology, and similar competitors: [email protected]"

Claude Code Plugin

This repository is also a Claude Code plugin marketplace (.claude-plugin/). The plugin bundles every skill in skills/ and connects to the hosted MCP server at https://mcp.tomba.io/mcp:

/plugin marketplace add tomba-io/tomba-mcp-server
/plugin install tomba@tomba

Then run /mcp and authenticate the tomba server with OAuth. No API keys are needed. Plugin skills are namespaced, for example /tomba:tomba-domain-search zapier.com.

Codex Plugin

.codex-plugin/plugin.json packages the same skills for OpenAI Codex. It loads the remote server from .mcp.json. After installing the plugin, sign in with OAuth:

codex mcp login tomba

To use API keys instead of OAuth, send the X-Tomba-Key and X-Tomba-Secret headers, or Authorization: Bearer <base64(ta_key:ts_secret)>, to https://mcp.tomba.io/mcp.

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-io/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-io/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-io/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": "[email protected]",
        "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": "[email protected]",
        "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": "[email protected]"
    }
}

Response:

{
    "data": {
        "email": {
            "email": "[email protected]",
            "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": "[email protected]"
    }
}

Response:

{
    "data": {
        "email": "[email protected]",
        "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": "[email protected]",
        "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": "[email protected]",
        "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-io/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.

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

• GitHub Issues
• Email Support
• Website