Email Spam Tester MCP Server

Email Spam Tester is a free, independent email deliverability testing tool built by Serhii Tanichev. This repository is the client side of its MCP server: how to connect an agent to it, what the four tools do, and how to read what they return. There is nothing to install on a server; the MCP endpoint is hosted with the tool.

Teams that work with dkim, dmarc and email deliverability and want a hosted endpoint instead of running a local process.

VERIFIED ACTIVE

LAST COMMIT 2026-09-18 · ★ 2 · #95 OF 98 MAINTAINED EMAIL · VERIFIED 2026-09-30

NOASSERTION · how we verify → /methodology

01 · Install Email Spam Tester

Claude Code

claude mcp add serg-tanichev-email-spam-tester-mcp --transport http https://email-spam-tester.com/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "serg-tanichev-email-spam-tester-mcp": {
      "url": "https://email-spam-tester.com/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

https://email-spam-tester.com/mcp

transport: streamable-http

endpoint alive - responded to MCP initialize · probed 2026-09-30

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 remote - your agent's requests go to email-spam-tester.com

endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect

repo age created 2026-09-13 - young repo, little track record yet

license no standard license detected - usage rights unclear; check the repo before commercial use

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

03 · Who maintains Email Spam Tester

email-spam-tester is maintained by serg-tanichev. It's the only MCP server we track from this author; the repo dates to Sep 2026.

04 · Facts

repository: github.com/serg-tanichev/email-spam-tester-mcp
category: email - ranked #95 of 98 actively-maintained email servers as of 2026-09-30.
registry: io.github.serg-tanichev/email-spam-tester (active, first published 2026-09-17)

05 · Email Spam Tester FAQ

What is Email Spam Tester?

Is Email Spam Tester still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-18. We re-verify nightly.

How do I install Email Spam Tester?

Run `claude mcp add serg-tanichev-email-spam-teste --transport http https://email-spam-tester.com/mcp`. You can also paste the ready-made client config above.

Does Email Spam Tester require authentication?

No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-09-30; you can connect without credentials.

06 · Alternatives to Email Spam Tester

Alternatives to Email Spam Tester

Maintained email servers if Email Spam Tester isn't the fit.

More email MCP servers · Abnormal Security MCP · Proton Mail (unofficial) · XCRS Mobile & TV Automation · SMTPing Email Verification · Inbox To Action