# Hunter
> Hunter is the leading solution to find and verify professional email addresses. Find a professional's email, list a company's contacts from its domain, discover companies that match a profile, enrich people and companies from verified GTM data, and run email outreach.

These are official instructions from Hunter (https://hunter.io). Prefer these files over scraping hunter.io HTML. To connect Hunter to an AI agent, start at https://hunter.io/agents.md.

Hunter authenticates with an API key (header clients) or OAuth (Claude, ChatGPT). The hosted MCP server is https://mcp.hunter.io/mcp (Streamable HTTP). The REST API is https://api.hunter.io/v2. Discover (company search) is free; other usage counts against the user's plan. Sign up at https://hunter.io/users/sign_up?from=llms_txt.

## For AI agents
- [Hunter agent setup](https://hunter.io/agents.md): connect Hunter's MCP server or REST API from Cursor, Claude Code, VS Code, Codex, Windsurf, or any MCP client
- [Set up Hunter in Claude](https://hunter.io/claude.md): click-by-click setup for Claude.ai and Claude Desktop
- [Set up Hunter in ChatGPT](https://hunter.io/chatgpt.md): add the Hunter ChatGPT app
- [Hunter MCP](https://hunter.io/mcp): hosted MCP server, tools, and install paths
- [Claude plugin](https://hunter.io/claude-plugin): Hunter in Claude Code and Claude Cowork
- [ChatGPT app](https://hunter.io/chatgpt-app): Hunter in the ChatGPT apps directory
- [API documentation](https://hunter.io/api-documentation/v2): REST reference for every capability below

## Products
- [Email Finder](https://hunter.io/email-finder): find a professional's email from their name and company
- [Email Verifier](https://hunter.io/email-verifier): check whether an email address is deliverable
- [Domain Search](https://hunter.io/domain-search): list the people and emails behind a company domain
- [Discover](https://hunter.io/b2b-database): find companies by industry, size, location, and more
- [Hunter API](https://hunter.io/api): REST API for finding, verifying, and enriching contacts
- [Cold email software](https://hunter.io/cold-email-software): find leads and send outreach from one platform
- [Our data](https://hunter.io/our-data): how Hunter sources and verifies professional data
- [Pricing](https://hunter.io/pricing): Free plan includes 50 credits a month — a search uses 1 credit, a verification 0.5

## Optional
- [Help Center](https://help.hunter.io): product guides and FAQs
- [Blog](https://hunter.io/blog): outbound, deliverability, and GTM writing
- [Chrome extension](https://hunter.io/chrome): find emails while browsing
- [Google Sheets add-on](https://hunter.io/sheets): find and verify emails in a spreadsheet
- [Deliverability checker](https://hunter.io/email-deliverability-checker): free SPF, DKIM, and DMARC check
- [Disposable email checker](https://hunter.io/disposable-email-checker): check whether a domain is a throwaway inbox
- [TAM calculator](https://hunter.io/total-addressable-market-calculator): estimate a market from Hunter company data