# Hunter MCP > Hunter MCP connects your AI agent directly to Hunter.io's powerful lead data engine. It finds professional email addresses based on a company domain, verifies if those emails are deliverable, and builds verified contact lists for targeted sales campaigns. Stop guessing addresses; start sending messages that actually get opened. ## Overview - **Category:** sales-automation - **Price:** Free - **Tags:** email-finder, email-verification, lead-enrichment, prospecting, contact-discovery, sales-intelligence ## Description Use this MCP to power your outreach efforts by validating and enriching prospect data without leaving your primary workflow. Instead of manually checking email databases or relying on outdated contacts, your agent can now perform real-time domain searches. Need a specific person's address? The tool finds it using just their name and the company domain. It also checks if any given email address is valid and safe to send to. If you’re building large lists for marketing campaigns, you can create and manage those lead groups directly through your agent. Because Vinkius hosts this connector, you connect once from Claude, Cursor, or Windsurf, giving your AI client immediate access to all these advanced data tools. You simply ask your agent to find emails, check a domain, or verify an address, and it handles the rest. ## Tools ### domain_search Searches for all potential professional email addresses tied to a specific company domain. ### list_recipients Generates and retrieves the list of intended recipients for an outreach campaign. ### email_finder Locates a specific person's email address using their full name and company domain. ### email_verifier Checks an entered email address to confirm if it is valid, deliverable, or unsafe to use. ### email_count Counts the total number of professional emails available for a given domain. ### list_leads Retrieves and manages existing lead lists that have already been saved by the user. ### list_lead_lists Shows a list of all the lead groups or lists you've created so far. ### get_account Retrieves general account information for the integrated Hunter.io service. ### list_campaigns Lists all past or current outreach campaigns you've run through the platform. ### get_campaign Retrieves detailed information about a specific, named campaign. ## Prompt Examples **Prompt:** ``` Find all email addresses at stripe.com. ``` **Response:** ``` I found 47 email addresses at stripe.com. Most common pattern: {first}@stripe.com. Top results: john@stripe.com (CEO, confidence: 95%), sarah@stripe.com (VP Engineering, confidence: 91%), and 45 more. ``` **Prompt:** ``` Find the email for Sarah Johnson at Acme Corp. ``` **Response:** ``` Found: sarah.johnson@acmecorp.com (confidence: 92%). Email pattern at acmecorp.com: {first}.{last}. Verified status: valid. Position: VP Marketing. Sources: 3 public pages. ``` **Prompt:** ``` Verify if contact@oldstartup.io is still valid. ``` **Response:** ``` Verification result: INVALID. The MX records for oldstartup.io are not configured — the domain's email server is unreachable. Do not send to this address. I recommend removing it from your outreach list. ``` ## Capabilities ### Discovering Company Emails Finds multiple professional email addresses associated with any given company domain. ### Locating Specific Contacts Pinpoints a specific person's email using only their name and the company they work for. ### Validating Email Deliverability Checks if an email address is genuinely valid, deliverable, and safe to send messages to right now. ### Building Prospect Lists Creates and manages groups of verified contacts for outreach or campaign use. ### Analyzing Domain Size Provides a count of total emails available for a specific company domain. ## Use Cases ### Scaling a cold email list for a new market A growth marketer needs 100 verified contacts at Acme Corp. They ask their agent to run the `domain_search` tool on acmecorp.com, which returns hundreds of potential addresses. The marketer then uses the MCP's ability to create and manage lead lists to segment the best ones for immediate use. ### Validating an old client list A sales rep gets a spreadsheet with 500 contacts that might be stale. Instead of sending them all, they ask their agent to run `email_verifier` on the whole batch first. The agent flags every invalid address, so the rep only sends emails to confirmed, active accounts. ### Targeting a specific VP at a competitor A recruiter needs to contact the VP of Marketing at TechGlobal Inc. They use their agent with `email_finder`, providing the name and domain. The agent returns the exact, verified email address in seconds, allowing immediate outreach. ### Planning a large-scale campaign A marketing manager needs to know how many prospects they can target at TargetCo. They first use `email_count` to gauge the size of the domain's email pool, then use `list_campaigns` to check historical data before generating new leads. ## Benefits - Stop guessing addresses. Use the `email_verifier` tool to confirm if any address is genuinely deliverable before your agent sends a message, saving you time and keeping your domain reputation clean. - Build massive prospect lists instantly. The MCP lets you use `domain_search` to find every professional email attached to a company's website, far faster than manual scraping. - Never lose track of leads again. You can use `list_lead_lists` and `list_leads` to manage and categorize all your verified contacts in one place for future campaigns. - Need a specific contact? The `email_finder` tool lets you locate an individual's email by name, skipping the guesswork when targeting decision-makers. - Streamline campaign management. By listing existing campaigns with `list_campaigns`, you can ensure your agent knows exactly which outreach sequence to work on next. ## How It Works The bottom line is you give your AI client the key, and it uses that power to run data enrichment tasks on demand. 1. Subscribe to the Hunter MCP on Vinkius and copy your API key from your Hunter.io dashboard. 2. Connect that key within your preferred AI client (like Cursor or Claude). 3. Ask your agent a specific task, such as 'Find all emails at examplecorp.com' or 'Verify contact@examplecorp.com', and get the results directly. ## Frequently Asked Questions **How does Hunter MCP help me find emails for a whole company?** You use the `domain_search` tool to input a company website's domain. The MCP will then return multiple professional email addresses associated with that entire organization. **Can I verify if an address is valid using Hunter MCP?** Yes, you use the `email_verifier` tool. It checks the MX records and deliverability status of any provided email, telling you immediately if it's safe to send to. **Is list_lead_lists for saving my contacts?** Yes, `list_lead_lists` lets you view all the organized groups of verified leads you have built. You can then ask your agent to interact with those lists using other tools. **What is the difference between email_finder and domain_search?** `domain_search` finds everything at a domain level, while `email_finder` targets one specific person. You use it when you know the name but need confirmation of the email. **Does Hunter MCP help me plan an outreach campaign?** You can manage this using `list_campaigns`. This tool allows your agent to see what campaigns have run before, ensuring your new efforts fit into existing strategies.