Nextmail

Name: Nextmail
Author: nextmailhq

by nextmailhqversion 1.0.6i★ –iRuns in the cloud

Registry namesh.nextmail/mcp

Install

Overview

Description from the maker (original English)

AI-native email for businesses, developers, and AI agents.

PopNx MCP’s three pillars

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

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi3 of 3 passedChecked from public information; code not scanned yet
UsageiVery new★ –

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: Chat & email

Install

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

Before you install

Basic checks: 3 of 3 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

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://api.nextmail.sh/mcp

Run this in your terminal

claude mcp add --transport http nextmail https://api.nextmail.sh/mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "nextmail": {
      "url": "https://api.nextmail.sh/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": {
    "nextmail": {
      "type": "http",
      "url": "https://api.nextmail.sh/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:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://api.nextmail.sh/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

The server asks you to sign in before it lists its tools.

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 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain nextmail.sh (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
✓ Pass
Endpoint responds
Responded in 1341 ms (HTTP 401)
✓ Pass
Sign-in with OAuth
Declares OAuth sign-in, so your AI app can take you to log in
… 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 Chat & emaili

More stars than 0% of the other 1850 servers in this category
Published to the registry more recently than 78% of the other 1850 servers in this category
Basic checks equal to or better than 100% of the other 1850 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 Nextmail safe?

It passed 3 of 3 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 (1.0.6) reached the registry 6 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: Vexa, emailmd, MCP WhatsApp Cloud

Alternatives

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

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

Vexa

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

by Vexa-aiWidely used★ 2.9KUpdated 2 months ago

Runs in the cloud✓ vexa.ai

Install

emailmd

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

by anypostGrowing↓ 5.3K/wk★ 1.4KUpdated 32 days ago

Computer or cloud✓ emailmd.dev

Install

MCP WhatsApp Cloud

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

by codesparEarly↓ 63/wk★ 277Updated 5 months ago

Runs on your computer

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.

Nextmail for AI agents

Email for AI agents and for the people who build them, from Nextmail. This repository connects your agent to your own Nextmail mailbox, and teaches it the jobs people most often hand to an agent: sending email from code, working through an inbox, catching verification emails in tests, and moving from Resend.

What is in it

One MCP server, https://api.nextmail.sh/mcp, the remote server Nextmail runs. Your client signs in with OAuth in the browser, and on the consent page you choose which permissions and which addresses the agent may use. You can narrow or remove the connection later under Account, Connected apps.
Four skills, in skills/: sending email with the SDKs, the API or the CLI; working in a mailbox over MCP; disposable inboxes for sign-up tests; and moving from Resend.

Install

Claude Code

/plugin marketplace add nextmailhq/mcp

/plugin install nextmail@nextmail

Claude, ChatGPT and other chat apps. Add https://api.nextmail.sh/mcp as a custom connector.

Codex. Add this to ~/.codex/config.toml:

[mcp_servers.nextmail]

url = "https://api.nextmail.sh/mcp"

Gemini CLI

gemini extensions install https://github.com/nextmailhq/mcp

Any agent that reads skills

npx skills add nextmailhq/mcp

Cursor, VS Code, Windsurf and other MCP clients. See https://nextmail.sh/docs/mcp/connect.md

Any other agent. Ask it to read this one Markdown page, which says how to connect over MCP, the command line or the API, and what to ask you before it sends anything: https://nextmail.sh/agent.md

No account yet

An agent can create the account for you, and your only part is the six-digit code emailed to you. It starts a sign-up with your address at POST https://api.nextmail.sh/signups, you give it the code, and POST https://api.nextmail.sh/signups/{id}/verify creates the account and gives the agent an API key for the command line and the API. Neither call needs a key, and npx @nextmail/cli signup --email does both steps. To connect over MCP as well, set a password from the welcome email, then sign in as above.

What it runs, sends and fetches

Nothing in this repository runs on your machine. The skills are written instructions, and the plugin adds one remote MCP server, which your client reaches over HTTPS at https://api.nextmail.sh/mcp once you have signed in. Its tools act on your Nextmail workspace, with the permissions you approved, and every tool is marked as reading or as making changes, so your client can ask before anything is sent or changed. The skills link to the documentation at https://nextmail.sh, and to the Nextmail SDK and CLI packages, which are installed only if you choose to.

Privacy, terms and support

Privacy policy: https://nextmail.sh/privacy
Terms: https://nextmail.sh/terms
Support: support@nextmail.sh
Documentation: https://nextmail.sh/docs/mcp/overview.md

License

MIT. See LICENSE.

Nextmail

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Chat & emaili

Common questions

Alternatives

Vexa

emailmd

MCP WhatsApp Cloud

README from the maker

Nextmail for AI agents

What is in it

Install

No account yet

What it runs, sends and fetches

Privacy, terms and support

License