Tool to delete an existing custom attribute. Use after confirming the attribute ID to be removed.

Tool to delete a lead. Use after confirming the lead's ID to remove it from your Hunter.io account.

Tool to delete a leads list by its ID. Use after confirming the leads list ID to remove it from your Hunter.io account.

Tool to search and retrieve companies matching specified criteria using filters or natural language queries. Use when you need to discover companies from Hunter's B2B dataset based on industry, location, size, or other characteristics.

Tool to search all email addresses for a given domain or company. Use when you need public emails and metadata for outreach or enrichment. Rate-limited; HTTP 429 returned on excess requests — honor the Retry-After header.

Tool to get the total number of email addresses Hunter has for a domain or company with breakdowns by type, department, and seniority. Use when you need email volume statistics without consuming API credits (this call is free).

Tool to find the most likely email address for a person at a domain or company. Use when you have a person's name and a domain or company and need to infer their email. Results include a confidence score and status; treat emails with status 'accept_all' or 'risky' as lower reliability. Each call consumes API credits — avoid re-enriching the same contact.

Tool to verify the deliverability of an email address. Use when you need to ensure an address is valid and reachable. Response may include statuses accept_all or risky, indicating uncertain deliverability; do not treat these as fully valid without explicit review. For bulk verification, honor Retry-After headers on HTTP 429 responses and use exponential backoff.

Tool to retrieve details of a specific custom attribute. Use when you need the label and slug for an attribute ID.

Tool to retrieve details of a specific lead by ID. Use after confirming the lead's ID to fetch its full record.

Tool to retrieve details of a specific leads list by ID. Use when you need to inspect the contents of an existing leads list.

Tool to get all email campaigns in your Hunter account. Campaigns are returned in reverse-chronological order by creation date. Use when you need to retrieve and filter campaigns by status (started/archived) with pagination support.

Tool to list all custom lead attributes in your account. Use when you need to retrieve your account's custom lead attributes after authenticating.

Tool to list all leads saved in your account with optional filters. Use when you need to retrieve leads with specific criteria after confirming your API key.

Tool to list all leads lists in your account. Use when you need to retrieve and paginate through your leads lists.

Tool to find all information associated with an email address or LinkedIn profile including name, location, job title and social handles. Use when you need to enrich contact data with additional personal and professional details.

Tool to update an existing custom attribute's label. Use when renaming a custom attribute after creation.

Tool to update details of an existing lead by ID. Use when you need to modify saved lead attributes after creation.

Tool to update the name of a specific leads list. Use when renaming an existing leads list.

Tool to create or update a lead by email in one call. Use when you want to ensure a lead exists with the provided information without checking its existence first.