ChatRail

Name: ChatRail
Author: chatrail

by chatrailversion 0.1.0i★ –iRuns in the cloud

Registry namedev.chatrail/chatrail

Install

Overview

Description from the maker (original English)

Inspect WhatsApp connections, groups, message delivery, schedules and webhooks in ChatRail.

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 checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

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: 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

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://www.chatrail.dev/v1/mcp

Run this in your terminal

claude mcp add --transport http chatrail https://www.chatrail.dev/v1/mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "chatrail": {
      "url": "https://www.chatrail.dev/v1/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": {
    "chatrail": {
      "type": "http",
      "url": "https://www.chatrail.dev/v1/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://www.chatrail.dev/v1/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 chatrail.dev (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 Chat & emaili

More stars than 0% of the other 1765 servers in this category
Published to the registry more recently than 38% of the other 1765 servers in this category
Basic checks equal to or better than 100% of the other 1765 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 ChatRail 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 (0.1.0) reached the registry 43 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:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Vexa

by Vexa-ai

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

Runs in the cloud★ 2,949Apache-2.0Updated 2 months ago

Install

emailmd

by anypost

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

Computer or cloud★ 1,385MITUpdated 31 days ago

Install

MCP WhatsApp Cloud

by codespar

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

Runs on your computer★ 277MITUpdated 5 months 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.

ChatRail MCP server

Operate a ChatRail workspace from Claude, Cursor, VS Code and any other Model Context Protocol client. Check the health of your WhatsApp connections, look up groups, trace why a message failed, manage scheduled messages and replay webhook deliveries without leaving your editor.

ChatRail is a WhatsApp API for developers: send and receive WhatsApp messages over HTTP from a number you already have. See the MCP documentation for the full reference.

Privacy by design

Message bodies, recipient phone numbers and credentials are never returned by any tool.
Tools that change state return a preview first and apply only when called again with confirm: true.
Every call is scoped to one workspace and recorded in its audit log.

Two ways to connect

1. Hosted server with OAuth (recommended)

Point any client that supports remote MCP servers at:

https://www.chatrail.dev/v1/mcp

Your client opens a browser window where a workspace owner, admin or developer approves access. Nothing to install and no key to copy.

Claude Code

claude mcp add --transport http chatrail https://www.chatrail.dev/v1/mcp

Cursor (~/.cursor/mcp.json)

"mcpServers": { "chatrail": { "url": "https://www.chatrail.dev/v1/mcp" } } }

VS Code (.vscode/mcp.json)

"servers": { "chatrail": { "type": "http", "url": "https://www.chatrail.dev/v1/mcp" } } }

2. Local stdio server with an API key

For clients that only run local servers, or when you would rather use an API key. This package runs on your machine and forwards requests to the hosted server.

In the ChatRail dashboard, create a workspace API key with the mcp:read scope. Add mcp:write if the assistant may reschedule, cancel, react or replay.
Add the server to your client.

Claude Desktop (claude_desktop_config.json)

"mcpServers": { "chatrail": { "command": "npx", "args": ["-y", "chatrail-mcp"], "env": { "CHATRAIL_API_KEY": "cr_live_..." } } } }

The package is published on npm as chatrail-mcp, so npx fetches it from the registry. If you need a version that is not published yet, run it straight from the repository instead:

"args": ["-y", "github:chatrail/chatrail_mcp"]

Docker

docker build -t chatrail-mcp .

docker run -i --rm -e CHATRAIL_API_KEY=cr_live_... chatrail-mcp

Variable	Required	Description
`CHATRAIL_API_KEY`	Yes, to call tools	Workspace API key with `mcp:read` (and optionally `mcp:write`).
`CHATRAIL_MCP_URL`	No	Override the endpoint. Defaults to `https://www.chatrail.dev/v1/mcp`.

Without a key the server still starts and lists its tools, so you can inspect it before signing up.

Tools

Tool	Scope	What it does
`list_connections`	read	Every WhatsApp connection in the workspace with its state and health.
`get_connection`	read	One connection with its state, health and recent state history.
`list_whatsapp_groups`	read	Groups visible to a connected number, with ids and participant counts.
`get_whatsapp_group`	read	Name, description, settings and member counts for one group.
`list_messages`	read	Recent messages with their delivery state.
`get_message`	read	One message and its delivery timeline.
`explain_message_failure`	read	A structured explanation of why a message failed.
`list_scheduled_messages`	read	Messages waiting to be sent, soonest first.
`list_webhook_deliveries`	read	Recent webhook deliveries and their outcomes.
`reschedule_message`	write	Change when a scheduled message is sent. Previews first.
`cancel_scheduled_message`	write	Cancel a message that has not been sent. Previews first.
`react_to_message`	write	Set or remove an emoji reaction on a message. Previews first.
`replay_webhook`	write	Requeue a dead or skipped webhook delivery. Previews first.

Plans

MCP access is included on the ChatRail Core + AI and Team plans. See pricing.

Development

npm install

npm run build CHATRAIL_API_KEY=cr_test_... node dist/index.js

tools.json is the tool catalog served when no API key is configured. It is exported from the hosted server and should be refreshed when the hosted tools change.

Agent skill

ChatRail publishes a skill file that tells an agent when to use ChatRail, what a person has to set up, how to send and receive, and the rules for sending. This MCP server operates a workspace and cannot send messages, so the skill points to the REST API for sending.

Give your agent this line:

Read https://www.chatrail.dev/SKILL.md and follow it to set up ChatRail.

Or install it with the skills CLI, which installs agent skills from a GitHub repository:

npx skills add chatrail/chatrail_mcp

Or copy it into Claude Code by hand:

mkdir -p ~/.claude/skills/chatrail

curl -fsSL https://www.chatrail.dev/SKILL.md -o ~/.claude/skills/chatrail/SKILL.md

The canonical file is https://www.chatrail.dev/SKILL.md. A copy lives in this repository at skills/chatrail/SKILL.md so tools that install skills from GitHub can find it.

License

MIT

ChatRail

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

ChatRail MCP server

Privacy by design

Two ways to connect

1. Hosted server with OAuth (recommended)

2. Local stdio server with an API key

Tools

Plans

Development

Agent skill

Links

License