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PopNx MCPMCP servers for people who use AI · explained in plain words

Securessmtp

by zainsaeed615version 1.0.0i★ –iRuns in the cloud
Registry namecom.securessmtp/securessmtp

Install

Overview

Description from the maker (original English)

Send email, manage sending domains, and read delivery analytics from your SecureSMTP account.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

  • Connection: Runs in the cloud
  • Transport: Streamable HTTP
  • Category: Marketing & social media

Install

Pick the AI app you use, then copy the settings.

Before you install

  • Basic checks: 1 of 1 passed
  • Runs on the maker’s server: what you ask it goes through their server.
  • The registry lists no key to fill in.

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

  1. Open Settings → Connectors
  2. Press Add custom connector
  3. Paste the address below and press Add
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Add2https://…3
https://securessmtp.com/api/mcp

Run this in your terminal

claude mcp add --transport http securessmtp https://securessmtp.com/api/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "securessmtp": {
      "url": "https://securessmtp.com/api/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "securessmtp": {
      "type": "http",
      "url": "https://securessmtp.com/api/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

  1. Open ChatGPT on the web → Settings → Connectors (Apps)
  2. Press Create or Add (some plans need Developer mode under Advanced first)
  3. Paste the address below, give it a name and save
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Create2https://…3
https://securessmtp.com/api/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified against the domain securessmtp.com (the registry checks domain ownership)

  • … Not checked yet

    Still maintained

    We have not read this repo from GitHub yet

  • … Not checked yet

    Has a licence

    We have not read this repo from GitHub yet

  • … Not checked yet

    Endpoint responds

    Not checked yet; we check endpoints in rotation

  • … Not checked yet

    Sign-in with OAuth

    Not checked yet; we check endpoints in rotation

  • … Not checked yet

    No hidden instructions in tool descriptions

    Not checked yet; we read the tool list when we check the endpoint

Compared with others in Marketing & social mediai

  • More stars than 0% of the other 2961 servers in this category
  • Published to the registry more recently than 41% of the other 2961 servers in this category
  • Basic checks equal to or better than 100% of the other 2961 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Securessmtp safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 39 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: MCP YouTube Transcript, Google Analytics MCP, BibiGPT YouTube Video Summarizer

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

An MCP server retrieving transcripts of YouTube videos

Runs on your computer★ 495MITUpdated 9 days ago
Install

GA4 MCP server for AI agents: schema discovery, server-side aggregation, analysis-ready defaults.

Runs on your computer★ 244MITUpdated 9 days ago
Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

SecureSMTP MCP server

Connect SecureSMTP to Claude and other MCP clients. Send transactional mail, manage sending domains, and read delivery analytics for your account — in natural language.

  • Endpoint: https://securessmtp.com/api/mcp (Streamable HTTP)
  • Auth: OAuth 2.1 (one-click, recommended) or a site API key as a Bearer token
  • Cost: free — every call runs against your own account and stays within your plan limits

What it can do

ToolWhat it does
get_accountPlan tier, email quota (used / limit / remaining), number of sending domains
list_sending_domainsList the account's sending domains and their verification status
add_sending_domainAdd a sending domain; returns the DNS records to publish
verify_domainVerify a sending domain's DNS (SPF / DKIM)
get_deliverabilityDelivery status counts for the last 30 days (delivered / opened / bounced / …)
send_emailSend a transactional email — enforces the same quota, spam scoring, and suppression as the API

Every tool is scoped to a single site, so a connection can only ever see or act on that account.

Connect from Claude Code

OAuth (opens a browser to approve):

claude mcp add --transport http securessmtp https://securessmtp.com/api/mcp

Or with a site API key (no browser step):

claude mcp add --transport http securessmtp https://securessmtp.com/api/mcp \

--header "Authorization: Bearer "

Connect from claude.ai (custom connector)

Requires a claude.ai Pro/Team/Enterprise plan (custom connectors are not available on the free tier).

  1. Settings → Connectors → Add custom connector
  2. URL: https://securessmtp.com/api/mcp
  3. Approve access when the SecureSMTP consent screen appears, and pick which site to grant.

Where to get an API key

Sign in at securessmtp.com, open a site, and copy its API key — the same key the WordPress plugin and REST API use.

How auth works

  • OAuth 2.1 with PKCE and dynamic client registration. Discovery lives at /.well-known/oauth-protected-resource and /.well-known/oauth-authorization-server. Access tokens are short-lived; refresh tokens rotate.
  • API key — send the site key as Authorization: Bearer .

Links

  • Website: https://securessmtp.com
  • API docs: https://securessmtp.com/docs/api
  • Support: https://securessmtp.com/contact

Connect from any MCP client

The server is remote (Streamable HTTP). Use OAuth (a browser approval) or send your site API key as a Bearer header. Endpoint: https://securessmtp.com/api/mcp

Claude Code (CLI)
claude mcp add --transport http securessmtp https://securessmtp.com/api/mcp

with an API key instead of OAuth:

claude mcp add --transport http securessmtp https://securessmtp.com/api/mcp \ --header "Authorization: Bearer "

Cursor — ~/.cursor/mcp.json (or .cursor/mcp.json in a project)
{

"mcpServers": { "securessmtp": { "url": "https://securessmtp.com/api/mcp" } } }

With an API key instead of OAuth, add headers:

{

"mcpServers": { "securessmtp": { "url": "https://securessmtp.com/api/mcp", "headers": { "Authorization": "Bearer " } } } }

VS Code (GitHub Copilot) — .vscode/mcp.json
{

"servers": { "securessmtp": { "type": "http", "url": "https://securessmtp.com/api/mcp" } } }

Codex CLI, Claude Desktop, Windsurf, Cline (stdio clients)

Clients that only speak stdio connect through the mcp-remote bridge, which also handles the OAuth browser flow for you.

Codex CLI — ~/.codex/config.toml:

[mcp_servers.securessmtp]

command = "npx" args = ["-y", "mcp-remote", "https://securessmtp.com/api/mcp"]

Claude Desktop / Windsurf / Cline — the JSON mcpServers block:

{

"mcpServers": { "securessmtp": { "command": "npx", "args": ["-y", "mcp-remote", "https://securessmtp.com/api/mcp"] } } }

Getting an API key

Sign in at securessmtp.com, open a site, and copy its API key. OAuth needs no key — you approve access in the browser and pick which site to grant.

Ask PopNx