Summary
Wraps the Hunter.io API for email discovery and verification directly into your MCP client. Useful when you need to find professional email addresses associated with a domain, verify if an email exists, or enrich contact data during research and outreach workflows. Hosted through Pipeworx's gateway, so you can connect via a simple HTTP URL without running a local server. The source doesn't list specific tools, but Hunter.io typically offers domain search, email finder, and verification endpoints. You can either call tools directly or use the ask_pipeworx interface to query in natural language. If you're building lead lists, validating contacts, or doing any kind of B2B prospecting from Claude, this gives you programmatic access to Hunter's database without leaving your agent environment.
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mcp-hunter
Hunter.io MCP — wraps the Hunter.io email finder & verification API (hunter.io)
Part of Pipeworx — an MCP gateway connecting AI agents to 1476+ live data sources.
Tools
| Tool | Description |
|---|---|
domain_search | Find email addresses for a domain on Hunter.io. Returns the email pattern plus a list of professional/work emails with names, positions, departments, and confidence scores. Example: domain_search({ domain: "stripe.com" }) |
email_finder | Find the most likely professional/work email address for a specific person at a domain on Hunter.io. Returns the email, a confidence score, position, and the number of corroborating sources. Example: email_finder({ domain: "stripe.com", first_name: "Patrick", last_name: "Collison" }) |
email_verifier | Verify an email address with Hunter.io email verification. Checks deliverability, MX records, SMTP, and whether the address is disposable or webmail. Returns a status, result, and confidence score. Example: email_verifier({ email: "patrick@stripe.com" }) |
Quick Start
Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):
{
"mcpServers": {
"hunter": {
"url": "https://gateway.pipeworx.io/hunter/mcp"
}
}
}
What this endpoint actually serves
tools/list at https://gateway.pipeworx.io/hunter/mcp returns the tools in the table
above plus the shared Pipeworx meta-tools — ask_pipeworx,
discover_tools, search_within, remember/recall and the rest of the
gateway-wide set. So the tool count you see is larger than this table: a
single-pack endpoint currently lists roughly 30 shared tools alongside the
pack's own. The connection's initialize response states its exact scope, and
is the authoritative answer for a given day.
This is deliberate, not multiplexing by accident. The meta-tools are what let a
scoped connection answer a question this pack does not cover — via
ask_pipeworx, which routes across the whole catalog — without you adding a
second MCP server. There is currently no way to mount a pack endpoint without
them; if the extra schemas cost you more context than the routing is worth,
connect to the full gateway once rather than to several pack endpoints.
Or connect to the full Pipeworx gateway to get every pack's tools listed directly, instead of just this one's:
{
"mcpServers": {
"pipeworx": {
"url": "https://gateway.pipeworx.io/mcp"
}
}
}
Both URLs reach the same gateway and the same 1476+ data sources. The
only difference is which pack's tools are listed directly; ask_pipeworx
reaches all of them from either one.
Using with ask_pipeworx
Instead of calling tools directly, you can ask questions in plain English — this works on the pack endpoint above as well as on the full gateway:
ask_pipeworx({ question: "your question about Hunter data" })
The gateway picks the right tool and fills the arguments automatically.
More
License
MIT
No MCP client? Call it over HTTP
curl -X POST https://gateway.pipeworx.io/v1/tools/domain_search \
-H 'Content-Type: application/json' \
-d '{"domain":"stripe.com"}'
No account needed for the first calls. Inspect any tool: GET https://gateway.pipeworx.io/v1/tools/domain_search. Find one: POST https://gateway.pipeworx.io/v1/tools/search_packs with {"query":"..."}.
Featured
Fastest browser for AI agents to run web automation tasks, always free.
Download Free life-time →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →