ChangeDetection.io MCP Server

Name: ChangeDetection.io MCP Server
Author: rusty4444

by rusty4444version 0.1.0i★ 3iRuns on your computer

Registry nameio.github.rusty4444/changedetection-mcp

How to install

What it does

MCP server for ChangeDetection.io website monitoring and change history.

Connects Runs on your computer
Account or key Needs CHANGEDETECTION_API_KEY · 1 setting to fill in (CHANGEDETECTION_BASE_URL)
Category Web & browsers

Install

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

Passed 3/3 checks · Runs on your computer · ✓ Commands checked Nov 13, 2026

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

You need a ChangeDetection.io MCP Server key (create it on the maker’s site) · 1 setting(s) to fill in (CHANGEDETECTION_BASE_URL) · Install Python (uv) on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Let AI install it

Copy this message into a Claude chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server ChangeDetection.io MCP Server for Claude on this computer, in this order: 1) Check uv with uv --version. If it is missing, tell me to install it from https://docs.astral.sh/uv/getting-started/installation/; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): { "mcpServers": { "changedetection": { "command": "uvx", "args": [ "changedetection-mcp" ], "env": { "CHANGEDETECTION_BASE_URL": "your-value", "CHANGEDETECTION_API_KEY": "your-value" } } } } 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For CHANGEDETECTION_API_KEY, CHANGEDETECTION_BASE_URL, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the ChangeDetection.io MCP Server tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install uv (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
uv --version
- A version number such as uv … = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: uv has no click-through installer. Copy the one-line command for your system (macOS or Windows) from uv’s official page into Terminal · no separate Python install needed; uv downloads it when required
Open the uv download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: uv --version
Install once; it works for everything that needs uv
Done
Sign up and create a ChangeDetection.io MCP Server key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
Open the ChangeDetection.io MCP Server site ↗
Done
3
Fill in 1 setting(s)
These are program settings, not keys. No sign-up needed; fill them in as the maker describes.
- CHANGEDETECTION_BASE_URL Base URL of the ChangeDetection.io instance, e.g. https://changedetection.example.com
Descriptions are as written by the maker.
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "changedetection": {
      "command": "uvx",
      "args": [
        "changedetection-mcp"
      ],
      "env": {
        "CHANGEDETECTION_BASE_URL": "your-value",
        "CHANGEDETECTION_API_KEY": "your-value"
      }
    }
  }
}

Paste the key only into the app’s field, never into a chat or to anyone

Done

Quit Claude and open it again
Done
Try it
Use ChangeDetection.io MCP Server and tell me what you can do for me, then show me one thing
✓ If Claude says it is using ChangeDetection.io MCP Server or shows a ChangeDetection.io MCP Server tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect ChangeDetection.io MCP Server yet

ChangeDetection.io MCP Server runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect ChangeDetection.io MCP Server

Steps for Claude →You need a ChangeDetection.io MCP Server key (create it on the maker’s site) · 1 setting(s) to fill in (CHANGEDETECTION_BASE_URL) · Install Python (uv) on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →You need a ChangeDetection.io MCP Server key (create it on the maker’s site) · 1 setting(s) to fill in (CHANGEDETECTION_BASE_URL) · Install Python (uv) on your computer first (one time)
Steps for Cursor →You need a ChangeDetection.io MCP Server key (create it on the maker’s site) · 1 setting(s) to fill in (CHANGEDETECTION_BASE_URL) · Install Python (uv) on your computer first (one time)
Steps for VS Code →You need a ChangeDetection.io MCP Server key (create it on the maker’s site) · 1 setting(s) to fill in (CHANGEDETECTION_BASE_URL) · Install Python (uv) on your computer first (one time)

B · Others in Web & browsers that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Firecrawl MCP Server✓ ChatGPT
webclaw✓ ChatGPT
Oxylabs MCP✓ ChatGPT

Works with Claude Code, with some setup first

You need a ChangeDetection.io MCP Server key (create it on the maker’s site) · 1 setting(s) to fill in (CHANGEDETECTION_BASE_URL) · Install Python (uv) on your computer first (one time)

Let AI install it

Copy this message into a Claude Code chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server ChangeDetection.io MCP Server for Claude Code on this computer, in this order: 1) Check uv with uv --version. If it is missing, tell me to install it from https://docs.astral.sh/uv/getting-started/installation/; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): claude mcp add --scope user changedetection --env CHANGEDETECTION_BASE_URL=your-value --env CHANGEDETECTION_API_KEY=your-value -- uvx changedetection-mcp 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For CHANGEDETECTION_API_KEY, CHANGEDETECTION_BASE_URL, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the ChangeDetection.io MCP Server tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install uv (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
uv --version
- A version number such as uv … = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: uv has no click-through installer. Copy the one-line command for your system (macOS or Windows) from uv’s official page into Terminal · no separate Python install needed; uv downloads it when required
Open the uv download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: uv --version
Install once; it works for everything that needs uv
Done
Sign up and create a ChangeDetection.io MCP Server key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
Open the ChangeDetection.io MCP Server site ↗
Done
3
Fill in 1 setting(s)
These are program settings, not keys. No sign-up needed; fill them in as the maker describes.
- CHANGEDETECTION_BASE_URL Base URL of the ChangeDetection.io instance, e.g. https://changedetection.example.com
Descriptions are as written by the maker.
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
5
Paste this command and press Enter
```
claude mcp add --scope user changedetection --env CHANGEDETECTION_BASE_URL=your-value --env CHANGEDETECTION_API_KEY=your-value -- uvx changedetection-mcp
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see ChangeDetection.io MCP Server listed as connected
Done
Try it
Use ChangeDetection.io MCP Server and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using ChangeDetection.io MCP Server or shows a ChangeDetection.io MCP Server tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

You need a ChangeDetection.io MCP Server key (create it on the maker’s site) · 1 setting(s) to fill in (CHANGEDETECTION_BASE_URL) · Install Python (uv) on your computer first (one time)

Let AI install it

Copy this message into a Cursor chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server ChangeDetection.io MCP Server for Cursor on this computer, in this order: 1) Check uv with uv --version. If it is missing, tell me to install it from https://docs.astral.sh/uv/getting-started/installation/; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): { "mcpServers": { "changedetection": { "command": "uvx", "args": [ "changedetection-mcp" ], "env": { "CHANGEDETECTION_BASE_URL": "your-value", "CHANGEDETECTION_API_KEY": "your-value" } } } } 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For CHANGEDETECTION_API_KEY, CHANGEDETECTION_BASE_URL, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the ChangeDetection.io MCP Server tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install uv (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
uv --version
- A version number such as uv … = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: uv has no click-through installer. Copy the one-line command for your system (macOS or Windows) from uv’s official page into Terminal · no separate Python install needed; uv downloads it when required
Open the uv download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: uv --version
Install once; it works for everything that needs uv
Done
Sign up and create a ChangeDetection.io MCP Server key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
Open the ChangeDetection.io MCP Server site ↗
Done
3
Fill in 1 setting(s)
These are program settings, not keys. No sign-up needed; fill them in as the maker describes.
- CHANGEDETECTION_BASE_URL Base URL of the ChangeDetection.io instance, e.g. https://changedetection.example.com
Descriptions are as written by the maker.
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the ChangeDetection.io MCP Server settings, CHANGEDETECTION_API_KEY, CHANGEDETECTION_BASE_URL is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use ChangeDetection.io MCP Server and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using ChangeDetection.io MCP Server or shows a ChangeDetection.io MCP Server tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

You need a ChangeDetection.io MCP Server key (create it on the maker’s site) · 1 setting(s) to fill in (CHANGEDETECTION_BASE_URL) · Install Python (uv) on your computer first (one time)

Let AI install it

Copy this message into a VS Code chat. The AI checks your computer, tells you which file it will change, and waits for your OK every time.

Please install the MCP server ChangeDetection.io MCP Server for VS Code on this computer, in this order: 1) Check uv with uv --version. If it is missing, tell me to install it from https://docs.astral.sh/uv/getting-started/installation/; do not install it yourself. 2) Use only this config (already checked by PopNx MCP): { "servers": { "changedetection": { "type": "stdio", "command": "uvx", "args": [ "changedetection-mcp" ], "env": { "CHANGEDETECTION_BASE_URL": "your-value", "CHANGEDETECTION_API_KEY": "your-value" } } } } 3) Tell me the full path of the file you will change, or the command you will run, and wait for my OK. 4) For CHANGEDETECTION_API_KEY, CHANGEDETECTION_BASE_URL, leave "your-value" in place and tell me to paste the real value myself into the file or the app’s field. Never ask me to type a key in chat. 5) Do what we agreed, then check that the ChangeDetection.io MCP Server tools really show up.

This message has no key in it. If a key is needed, the AI will ask you to paste it yourself into the file or the app’s field.

1
Install uv (if you don’t have it)
Already installed? Check first · Open Terminal, type this command and press Enter
uv --version
- A version number such as uv … = installed, skip this step
- "command not found" (on Windows: "is not recognized") = not installed yet, or installed but Terminal needs to be closed and reopened
How to open Terminal
Mac: press ⌘ + Space, type Terminal, press Enter
Windows: open Start, type Windows PowerShell, then Open
Not installed: uv has no click-through installer. Copy the one-line command for your system (macOS or Windows) from uv’s official page into Terminal · no separate Python install needed; uv downloads it when required
Open the uv download page ↗
When it’s done, close Terminal, open it again and run the same command. You should see a version number: uv --version
Install once; it works for everything that needs uv
Done
Sign up and create a ChangeDetection.io MCP Server key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
Open the ChangeDetection.io MCP Server site ↗
Done
3
Fill in 1 setting(s)
These are program settings, not keys. No sign-up needed; fill them in as the maker describes.
- CHANGEDETECTION_BASE_URL Base URL of the ChangeDetection.io instance, e.g. https://changedetection.example.com
Descriptions are as written by the maker.
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the ChangeDetection.io MCP Server settings, CHANGEDETECTION_API_KEY, CHANGEDETECTION_BASE_URL is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use ChangeDetection.io MCP Server and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using ChangeDetection.io MCP Server or shows a ChangeDetection.io MCP Server tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use ChangeDetection.io MCP Server💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add --scope user changedetection --env CHANGEDETECTION_BASE_URL=your-value --env CHANGEDETECTION_API_KEY=your-value -- uvx changedetection-mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "changedetection": {
      "command": "uvx",
      "args": [
        "changedetection-mcp"
      ],
      "env": {
        "CHANGEDETECTION_BASE_URL": "your-value",
        "CHANGEDETECTION_API_KEY": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "changedetection": {
      "command": "uvx",
      "args": [
        "changedetection-mcp"
      ],
      "env": {
        "CHANGEDETECTION_BASE_URL": "your-value",
        "CHANGEDETECTION_API_KEY": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "changedetection": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "changedetection-mcp"
      ],
      "env": {
        "CHANGEDETECTION_BASE_URL": "your-value",
        "CHANGEDETECTION_API_KEY": "your-value"
      }
    }
  }
}

Values you fill in

CHANGEDETECTION_BASE_URL required env
Base URL of the ChangeDetection.io instance, e.g. https://changedetection.example.com
CHANGEDETECTION_API_KEY secret required env
ChangeDetection.io API key

Descriptions are as written by the maker.

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

At a glance

GitHub stars i: 3
Downloads per weeki: 66/wk
Licence i: MIT
Connection: Runs on your computer
Transport: stdio
Latest versioni: 0.1.0
Categoryi: Web & browsers
Published to registryi: May 18, 2026
Code last changedi: Oct 10, 2026
Maker: rusty4444
Packages: pypi: changedetection-mcp
Repo: rusty4444/changedetection-mcp
Website: github.com
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 16, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account rusty4444, which owns the repo
✓ Pass
Still maintained
Code last changed 37 days ago
✓ Pass
Has a licence
Uses MIT
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Published vulnerabilities (OSV.dev)

No entries on OSV.dev for changedetection-mcp@0.1.0

Checks only this package version, not every dependency · checked Nov 15, 2026

What we check → · JSON

Makers: ask for a re-check or report wrong info

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Web & browsersi

More stars than 86% of the other 1532 servers in this category
Published to the registry more recently than 8% of the other 1532 servers in this category
Basic checks equal to or better than 100% of the other 1532 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 ChangeDetection.io MCP Server 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?

You need to fill in: CHANGEDETECTION_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 37 days ago, and the latest version (0.1.0) reached the registry 6 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Browser Use, changedetection.io (official), Apify MCP Server, Actionbook, Flowershow

Similar alternatives

Same category, other makers, commands already checked. Official ones first, then by stars.

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

Browser Use

Lets AI do web tasks for you, such as filling forms, searching and extracting data, in the maker’s cloud browsers or on your computer.

by browser-useWidely used↓ 1.7M/wk★ 121.1KUpdated 26 days ago

Computer or cloud✓ service owner · browser-use.com

Install

changedetection.io (official)

Official changedetection.io MCP: web page change tracking, back-in-stock and price alerts.

by dgtlmoonWidely used★ 35.8KUpdated 11 days ago

Runs in the cloud✓ service owner · changedetection.io

How to connect

Apify MCP Server

Extract data from any website with thousands of scrapers, crawlers, and automations on Apify Store ⚡

by apifyWidely used★ 16.3KUpdated 3 days ago

Runs in the cloud✓ service owner · apify.com

How to connect

Actionbook

Let your AI agent operate any website through a real, logged-in browser session.

by actionbookGrowing★ 1.6KUpdated 28 days ago

Runs in the cloud✓ service owner · actionbook.app

How to connect

Flowershow

Publish Markdown and HTML from your AI session as a live website. No account needed.

by flowershowGrowing★ 1.1KUpdated 21 days ago

Runs in the cloud✓ service owner · flowershow.app

How to connect

Browser Use — Cloud or install on your computer · Needs a key · In Claude’s directory
changedetection.io (official) — Runs in the cloud, nothing to install · No key needed
Apify MCP Server — Runs in the cloud, nothing to install · Needs a key
Actionbook — Runs in the cloud, nothing to install · No key needed
Flowershow — Runs in the cloud, nothing to install · No key needed

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.

ChangeDetection.io MCP Server

An MCP (Model Context Protocol) server that gives AI agents native access to ChangeDetection.io — the open-source website change detection and monitoring platform.

Features

Watch Management — Create, list, update, delete, and trigger rechecks on watches
Change History — Browse snapshot history and get diffs between any two points in time
Per-watch action fuse — get_snapshot_diff arms a configurable limit on follow-up mutating actions for that watch so one noisy page cannot cascade into unlimited rechecks or edits
Tag Management — Organise watches with tags/groups
Search — Full-text search through watches by URL or title
System Info — Quick health and stats readout

Why This Exists

No MCP server existed for ChangeDetection.io despite it being one of the most popular self-hosted tools (31k+ GitHub stars). This server fills that gap, letting AI agents:

"Watch this product page and notify me when it changes"
"Show me all my failed watches"
"What changed on this page yesterday?"
"Set up a watch for this job listing"

Quick Start

Prerequisites

A running ChangeDetection.io instance (self-hosted or SaaS)
An API key from Settings → API

Installation

pip install changedetection-mcp

Configuration

Add to your MCP client config (Claude Desktop, Cursor, Hermes Agent, etc.):

"mcpServers": { "changedetection": { "command": "changedetection-mcp", "env": { "CHANGEDETECTION_BASE_URL": "http://localhost:5000", "CHANGEDETECTION_API_KEY": "your-api-key-here" } } } }

Usage with Hermes Agent

Create ~/.hermes/skills/changedetection/SKILL.md (see skill/ directory) or configure as an MCP server:

hermes mcp add changedetection --command "changedetection-mcp"

hermes config set changedetection.base_url "http://localhost:5000" hermes config set changedetection.api_key "your-api-key"

API Coverage

Tool	Description
`list_watches`	List all watches (optional tag filter, limit/offset)
`get_watch`	Get full details of a single watch
`create_watch`	Create a new watch from a URL
`update_watch`	Update an existing watch (pause, rename, change schedule, etc.)
`delete_watch`	Delete a watch and all its history
`recheck_watch`	Trigger an immediate recheck
`get_watch_history`	List change history snapshots for a watch
`get_snapshot_diff`	Get diff between two snapshots
`search_watches`	Full-text search by URL or title
`list_tags`	List all tags/groups
`create_tag`	Create a tag for organisation
`get_system_info`	Get server stats (watch count, uptime, version)

Safety Fuse: Per-Watch Action Limit

When an agent asks for a page diff, that diff can prompt follow-up actions such as immediate rechecks, watch edits, or deletes. To stop one noisy site from triggering a cascade, get_snapshot_diff arms a per-watch fuse before returning.

By default, each diff allows 3 mutating MCP actions for that watch. The fuse applies to:

recheck_watch
update_watch
delete_watch

After the budget is exhausted, those tools return a clear blocked message instead of calling the ChangeDetection.io API. The fuse is in-process and per watch UUID; watches without an armed fuse are unaffected.

Configuration:

# Default: 3. Set 0 to disable the fuse globally.

export CHANGEDETECTION_MCP_ACTION_LIMIT_PER_WATCH=3

Per call, override the default with the optional action_limit argument on get_snapshot_diff:

get_snapshot_diff(uuid="...", from_timestamp="previous", to_timestamp="latest", action_limit=1)

Use action_limit=0 to disable the fuse for that watch, or call get_snapshot_diff again with a higher value to re-arm it.

Development

git clone https://github.com/rusty4444/changedetection-mcp.git

cd changedetection-mcp uv venv source .venv/bin/activate uv pip install -e ".[dev]"

License

MIT — see LICENSE.

ChangeDetection.io MCP Server

What it does

Install

Install uv (if you don’t have it)

Sign up and create a ChangeDetection.io MCP Server key

Fill in 1 setting(s)

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install uv (if you don’t have it)

Sign up and create a ChangeDetection.io MCP Server key

Fill in 1 setting(s)

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install uv (if you don’t have it)

Sign up and create a ChangeDetection.io MCP Server key

Fill in 1 setting(s)

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install uv (if you don’t have it)

Sign up and create a ChangeDetection.io MCP Server key

Fill in 1 setting(s)

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

At a glance

Which apps can use it

Related guides

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

Published vulnerabilities (OSV.dev)

Discussion

User reviews

Compared with others in Web & browsersi

Common questions

Similar alternatives

Browser Use

changedetection.io (official)

Apify MCP Server

Actionbook

Flowershow

README from the maker

ChangeDetection.io MCP Server

Features

Why This Exists

Quick Start

Prerequisites

Installation

Configuration

Usage with Hermes Agent

API Coverage

Safety Fuse: Per-Watch Action Limit

Development

License