Duplicacy-MCP
A tiny bridge that reads Duplicacy backup metrics from a Prometheus exporter and exposes them as an MCP server, enabling LLMs to monitor backup status, progress, and health.
---
## What you get
| Type | What for | MCP URI / Tool id |
|---------------|------------------------------------------------------------|----------------------------------|
| **Resources** | Browse backup status, progress, and health read-only | `duplicacy://status`
`duplicacy://progress`
`duplicacy://health` |
| **Tools** | Query backup history, list snapshots, and check prune status | `get_backup_status`
`get_backup_history`
`list_snapshots`
`get_prune_status` |
Everything is exposed over a single JSON-RPC endpoint (`/mcp`).
LLMs / Agents can: `initialize` -> `readResource` -> `listTools` -> `callTool` ... and so on.
---
## Quick-start (Docker Compose)
```yaml
services:
duplicacy-mcp:
image: drumsergio/duplicacy-mcp:0.1.0
ports:
- "127.0.0.1:8080:8080"
environment:
- DUPLICACY_EXPORTER_URL=http://duplicacy-exporter:9750
```
> **Security note:** The HTTP transport listens on `127.0.0.1:8080` by default. If you need to expose it on a network, place it behind a reverse proxy with authentication.
## Install via npm (stdio transport)
```sh
npx duplicacy-mcp
```
Or install globally:
```sh
npm install -g duplicacy-mcp
duplicacy-mcp
```
This downloads the pre-built Go binary from GitHub Releases for your platform and runs it with stdio transport. Requires at least one [published release](https://github.com/GeiserX/duplicacy-mcp/releases).
## Local build
```sh
git clone https://github.com/GeiserX/duplicacy-mcp
cd duplicacy-mcp
# (optional) create .env from the sample
cp .env.example .env && $EDITOR .env
go run ./cmd/server
```
## Configuration
| Variable | Default | Description |
|--------------------------|----------------------------|------------------------------------------------------|
| `DUPLICACY_EXPORTER_URL` | `http://localhost:9750` | Duplicacy Prometheus exporter URL (without trailing /)|
| `LISTEN_ADDR` | `127.0.0.1:8080` | HTTP listen address (Docker sets `0.0.0.0:8080`) |
| `TRANSPORT` | _(empty = HTTP)_ | Set to `stdio` for stdio transport |
Put them in a `.env` file (from `.env.example`) or set them in the environment.
## Testing
Tested with [Inspector](https://modelcontextprotocol.io/docs/tools/inspector) and it is currently fully working. Before making a PR, make sure this MCP server behaves well via this medium.
## Example configuration for client LLMs
```json
{
"schema_version": "v1",
"name_for_human": "Duplicacy-MCP",
"name_for_model": "duplicacy_mcp",
"description_for_human": "Monitor Duplicacy backup status, progress, and health via Prometheus metrics.",
"description_for_model": "Interact with a Duplicacy backup monitoring server that reads metrics from a Prometheus exporter. First call initialize, then reuse the returned session id in header \"Mcp-Session-Id\" for every other call. Use readResource to fetch URIs that begin with duplicacy://. Use listTools to discover available actions and callTool to execute them.",
"auth": { "type": "none" },
"api": {
"type": "jsonrpc-mcp",
"url": "http://localhost:8080/mcp",
"init_method": "initialize",
"session_header": "Mcp-Session-Id"
},
"contact_email": "acsdesk@protonmail.com",
"legal_info_url": "https://github.com/GeiserX/duplicacy-mcp/blob/main/LICENSE"
}
```
## Credits
[Duplicacy](https://duplicacy.com/) -- lock-free deduplication cloud backup
[duplicacy-exporter](https://github.com/GeiserX/duplicacy-exporter) -- Prometheus exporter for Duplicacy
[MCP-GO](https://github.com/mark3labs/mcp-go) -- modern MCP implementation
[GoReleaser](https://goreleaser.com/) -- painless multi-arch releases
## Maintainers
[@GeiserX](https://github.com/GeiserX).
## Contributing
Feel free to dive in! [Open an issue](https://github.com/GeiserX/duplicacy-mcp/issues/new) or submit PRs.
Duplicacy-MCP follows the [Contributor Covenant](http://contributor-covenant.org/version/2/1/) Code of Conduct.
## Other MCP Servers by GeiserX
- [cashpilot-mcp](https://github.com/GeiserX/cashpilot-mcp) — Passive income monitoring
- [genieacs-mcp](https://github.com/GeiserX/genieacs-mcp) — TR-069 device management
- [lynxprompt-mcp](https://github.com/GeiserX/lynxprompt-mcp) — AI configuration blueprints
- [pumperly-mcp](https://github.com/GeiserX/pumperly-mcp) — Fuel and EV charging prices
- [telegram-archive-mcp](https://github.com/GeiserX/telegram-archive-mcp) — Telegram message archive
## Related Projects
| Project | Description |
|---------|-------------|
| [duplicacy-cli-cron](https://github.com/GeiserX/duplicacy-cli-cron) | Docker-based encrypted dual-storage backup automation using Duplicacy CLI |
| [duplicacy-exporter](https://github.com/GeiserX/duplicacy-exporter) | Real-time Prometheus exporter for Duplicacy backups |
| [duplicacy-ha](https://github.com/GeiserX/duplicacy-ha) | Home Assistant custom integration for monitoring Duplicacy backups |
| [duplicacy-container](https://github.com/GeiserX/duplicacy-container) | Container image and Helm chart for running Duplicacy on Kubernetes |