Email Verifier MCP server

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by verifox.ai·ai.verifox/email-verifier·v1.2.1

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Verify email deliverability & find business emails (single or bulk) via the Verifox API.

A85/100grade A

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Safety scan

A85/100

full report

Adoption

Growing

0 stars26 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Email Verifier tools (6, 2 write)

write = sends, deletes, buys or posts

find_emailwrite actionFree
Find ONE person's business email from their name and company domain. Generates ~50 permutations and SMTP-verifies each, waits for the result, and returns the best match (or not_found). Charges 10 Fox Credits per find.
find_emailsFree
Bulk-find business emails for a LIST of contacts (name + company domain each). Submits the list, waits for completion, and returns the found email per contact. Up to 1000 contacts. Charges 10 Fox Credits per contact. Large lists that don't finish quickly return a jobId to poll with get_job.
get_creditsFree
Get the current Fox Credit balance for the Verifox account tied to the API key. Free — no credits charged. Use it to check remaining balance before a big verify/find run (verify = 1 credit/email, find = 10 credits/contact).
get_jobFree
Check an async job started by verify_emails, find_email, or find_emails. Returns results if finished, otherwise the current status. Use the type shown in the submitting tool's response.
verify_emailwrite actionFree
Verify whether ONE email address is deliverable. Checks syntax, MX, SMTP, catch-all, disposable, free-provider and role detection, and returns a 0-100 quality score. Charges 1 Fox Credit per uncached email.
verify_emailsFree
Bulk-verify a LIST of email addresses. Submits the whole list, waits for completion, and returns one result per email (same fields as verify_email). Best for cleaning lead lists. Charges 1 Fox Credit per email. Large lists that don't finish quickly return a jobId to poll with get_job.

Public scan report

scanner v0.1.9 · 2026-09-25 · same rubric, same numbers if you re-run it

no findings

Code scan2 source files scanned25/25
Live reliabilityremote reachable in 1322ms20/20
Tool poisoning6 tool descriptions checked15/15
Auth qualityAPI key sent as a header8/15
Maintenancelast push 65 days ago12/15
Maintainer identitynamespace and repository owner differ; website matches verified namespace5/10

Overall 85/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

How Email Verifier compares

Against every graded Email MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 85/100; higher than 78% of 916 Email servers
Tools: 6; the typical Email server has 7
Tools that change things: 33%; typical: 25%. Fewer write tools means less an agent can break
Uptime: 100%; of our recent checks; the typical remote Email server answers 100%
Response time: 356 ms; faster than 45% of 609 Email servers
Downloads a week: 26; more than 9% of 235 Email servers with a package

What its tools let an agent do: 4 read · 2 change

Install Email Verifier in Claude Code, Cursor or VS Code

claude mcp add --transport http email-verifier https://mcp.verifox.ai/mcp

Add to Cursor

What the publisher says

From the Email Verifier repository's README, as published. We do not edit it. Read it on GitHub

Verifox MCP Server

MCP (Model Context Protocol) server that gives Claude and other AI assistants the Verifox API — verify email deliverability and find business emails, both single and in bulk.

Quick start (published package)

Add to your Claude Desktop config (~/Library/Application Support/Claude/claudedesktopconfig.json) or Claude Code MCP config — no install needed, npx fetches it:

{
  "mcpServers": {
    "verifox": {
      "command": "npx",
      "args": ["-y", "verifox-mcp"],
      "env": {
        "VERIFOX_API_KEY": "foxkey_your_key_here"
      }
    }
  }
}

Get a free API key (1,000 credits) at https://verifox.ai/dashboard/api. Restart Claude Desktop and ask it to "verify these emails".

Tools

Verify and find are async for large lists: the bulk tools wait ~55s inline, and hand back a jobId to finish via get_job if a job runs longer. Cached verifications cost 0 credits.

Local development

Run straight from source with Bun (no build):

cd mcp
bun install

{
  "mcpServers": {
    "verifox": {
      "command": "bun",
      "args": ["run", "/FULL/PATH/TO/Verifox-api/mcp/src/index.ts"],
      "env": {
        "VERIFOX_API_URL": "https://api.verifox.ai",
        "VERIFOX_API_KEY": "foxkey_your_key_here"

{ "mcpServers": { "verifox": { "command": "bun", "args": ["run", "/FULL/PATH/TO/Verifox-api/mcp/src/index.ts"], "env": { "VERIFOXAPIURL": "https://api.verifox.ai", "VERIFOXAPIKEY": "foxkeyyourkey_here" } } } }

`VERIFOX_API_URL` defaults to `https://api.verifox.ai` when unset. For local
development against the API on port 8001, set it to `http://localhost:8001`.

### 3. Restart Claude Desktop

The tools will appear in Claude's tool list.

## Remote (HTTP) mode

The same server also runs as a **streamable-HTTP** MCP endpoint (for Smithery,
claude.ai connectors, and other remote MCP clients). Set `MCP_TRANSPORT=http`
(or a `PORT`) and it listens on `POST /mcp` with a `GET /health` check:

MCP_TRANSPORT=http PORT=8080 node dist/index.js

or: docker build -t verifox-mcp . && docker run -p 8080:8080 verifox-mcp

In HTTP mode the Verifox API key is read **per request** from the
`Authorization: Bearer <foxkey>` header (also accepts `x-api-key` or `?api_key=`)
— so one hosted endpoint serves many users, each on their own credits.

## Usage Examples

In Claude Desktop, just ask:

- "Scan stripe.com for security issues"
- "Check if john@google.com is a valid email"
- "Score these emails: admin@stripe.com, test@mailinator.com, john.doe@microsoft.com"
- "Find the email for Patrick Collison at stripe.com"
- "Run OSINT on tesla.com — find subdomains and emails"
- "Test the email server for turnix.co"
- "Check DMARC policy for google.com"

## Environment Variables

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Email Verifier: common questions

Is Email Verifier MCP server safe?: Yes, by our scan: it is graded A (85/100). Read the Email Verifier safety report
How do I install Email Verifier?: It runs remotely at mcp.verifox.ai. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Email Verifier need an API key?: Yes. The registry entry asks for VERIFOX_API_KEY, x-api-key.
Is Email Verifier maintained?: The last commit was 105 days ago (2026-07-22). The latest release is v1.2.1.
Is Email Verifier up?: 100% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of Email Verifier?: Servers from other publishers that do the same job: MailProbe MCP server, emailmd MCP server and Shipmail MCP server. Compare all Email Verifier alternatives.
How does Email Verifier compare with other Email MCP servers?: safety score 85/100 (higher than 78% of 916 Email servers); tools 6 (the typical Email server has 7); tools that change things 33% (typical: 25%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to Email Verifier

Same job from other publishers: the closest match first, then the best rated.

All Email Verifier alternatives →

MailProbe
Verify email addresses in real time: deliverability, disposable and role addresses, typo fixes.
not reviewed
Growing
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emailmd
Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.
not reviewed
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A
Shipmail
Modern email for your business. Inboxes, calendars, newsletters and an API for your agents.
not reviewed
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Parse-DMARC MCP Server
Lightweight DMARC parser: auto-fetch email reports, visualize compliance in a single all-in-one app
not reviewed
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MisarMail MCP Server
Send transactional email, run campaigns, manage contacts and automations, audit deliverability.
not reviewed
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A

Run it through the gateway

With the gateway added, ask your agent for it by name:

agent prompt

call ai.verifox/email-verifier → find_email

Free per call. Metered, capped by your key, logged for reliability.

Add the gateway (gw.mcp.market)

Rating: —
Safety grade: A · 85/100
Stars: 0
Downloads/wk: 26
Price: Free
Licence: NOASSERTION
Transport: Remote · mixed
Uptime: 100% · 28/28 checks
Version: 1.2.1
Category: Email
Last release: 2026-07-22

Credentials it needs

VERIFOX_API_KEYsecretYour Verifox API key (foxkey_...). Get 1,000 free credits at https://verifox.ai/dashboard/api

Endpoint

https://mcp.verifox.ai/mcp

streamable-http

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