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MCP server for ChangeDetection.io website monitoring and change history.
MCP server for ChangeDetection.io website monitoring and change history.
The ChangeDetection.io MCP server is well-structured with proper authentication and reasonable permissions scoped to its purpose. Code quality is solid with appropriate error handling. Minor findings include test discovery artifacts (hardcoded API key) and broad exception handling that do not materially impact security. Authentication is properly implemented via environment variables and the per-watch action limit provides a thoughtful safety mechanism. Supply chain analysis found 4 known vulnerabilities in dependencies (0 critical, 3 high severity). Package verification found 1 issue.
7 files analyzed · 10 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
This plugin requests these system permissions. Most are normal for its category.
Set these up before or after installing:
Environment variable: CHANGEDETECTION_BASE_URL
Environment variable: CHANGEDETECTION_API_KEY
Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-rusty4444-changedetection-mcp": {
"env": {
"CHANGEDETECTION_API_KEY": "your-changedetection-api-key-here",
"CHANGEDETECTION_BASE_URL": "your-changedetection-base-url-here"
},
"args": [
"changedetection-mcp"
],
"command": "uvx"
}
}
}From the project's GitHub README.
An MCP (Model Context Protocol) server that gives AI agents native access to ChangeDetection.io — the open-source website change detection and monitoring platform.
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 editsNo 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:
pip install changedetection-mcp
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"
}
}
}
}
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"
| 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) |
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_watchupdate_watchdelete_watchAfter 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.
git clone https://github.com/rusty4444/changedetection-mcp.git
cd changedetection-mcp
uv venv
source .venv/bin/activate
uv pip install -e ".[dev]"
MIT — see LICENSE.
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