SMTPing Email Verification MCP Server

Official Model Context Protocol server for SMTPing. It lets Claude, Cursor, VS Code, Windsurf and any MCP client verify email addresses in a conversation. Its 5 documented tools cluster into verify, read & search, check. It runs locally over stdio via the published package.

People who work with verify and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in JavaScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-27 · ★ 2 · #52 OF 98 MAINTAINED EMAIL · VERIFIED 2026-09-30

MIT · JavaScript servers · how we verify → /methodology

01 · Install SMTPing Email Verification

before you install - you'll need

SMTPING_API_KEY

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add smtping-smtping-mcp -- npx -y @smtping/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "smtping-smtping-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@smtping/mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

repo age created 2026-09-27 - young repo, little track record yet

license MIT - declared in the repository

npm package @smtping/mcp - published under the repo owner's npm scope (@smtping)

registry namespace io.github.smtping is GitHub-verified and matches the repo owner

03 · What SMTPing Email Verification can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can verify one address: status plus band (safe, avoid, judgement), and verify a list as one bulk job (up to 100,000), waits for results.

Capability map

Tools grouped from the project's README - what SMTPing Email Verification lets an agent do.

Verify

2 tools - e.g. Verifies one address: status plus band (safe, avoid, judgement); Verifies a list as one bulk job (up to 100,000), waits for results

verify_email · verify_list

read & search

2 tools - e.g. Progress and results of a bulk job; Remaining credits and plan

get_bulk_job · get_credits

Check

1 tool - e.g. Looks up one address in the spamtrap, disposable, spambot or complainer list

check_threat

Latest releases

v1.0.0 · 2026-09-27

04 · Who maintains SMTPing Email Verification

SMTPing Email Verification is maintained by smtping. It's the only MCP server we track from this author; the repo dates to Sep 2026.

05 · Facts

repository: github.com/smtping/smtping-mcp
website: https://smtping.com/email-verification-mcp
category: email - ranked #52 of 98 actively-maintained email servers as of 2026-09-30.
release cadence: 1 release in the last 90 days (latest 2026-09-27)
registry: io.github.smtping/smtping-mcp (active, first published 2026-09-27)
packages: npm:@smtping/mcp

06 · SMTPing Email Verification FAQ

Is SMTPing Email Verification still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-27 and it shipped 1 release in the last 90 days. We re-verify nightly.

What can SMTPing Email Verification do?

With this server connected, an agent can verify one address: status plus band (safe, avoid, judgement), and verify a list as one bulk job (up to 100,000), waits for results.

How do I install SMTPing Email Verification?

Run `npx -y @smtping/mcp`. The README documents one environment variable (SMTPING_API_KEY) to set first. You can also paste the ready-made client config above.

Does SMTPing Email Verification run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to SMTPing Email Verification

Alternatives to SMTPing Email Verification

Maintained email servers if SMTPing Email Verification isn't the fit.

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