Joplin MCP
Exposes a Joplin note collection as a tool set to MCP clients, running on Cloudflare Workers. It enables semantic search over indexed notes, notebook browsing, and creating/updating/deleting notes and notebooks via the Joplin Data API.
README
Joplin MCP
An MCP server that exposes a Joplin note collection as a tool set, running as a stateful agent on Cloudflare Workers. Point an MCP client (Claude, etc.) at the deployed endpoint and it can browse notebooks and notes, and create/update/delete notes and notebooks directly against your own Joplin instance.
How it works
Every tool call goes straight to the Joplin Data API on your live instance — there's no index or cache in between.
MCP client ──HTTP/SSE──► Worker (/mcp) ──► JoplinMCP (Durable Object)
│
JoplinClient ──► Joplin Data API
JoplinMCP is a McpAgent hosted on a Durable Object.
Tools
| Tool | Description |
|---|---|
get_note |
Fetch a single note by ID — title, body, metadata |
list_notebooks |
List all notebooks with IDs and names |
list_notes |
List notes in a given notebook |
create_note |
Create a note in a notebook |
update_note |
Update a note's title, body, or notebook |
delete_note |
Permanently delete a note |
create_notebook |
Create a notebook, optionally nested |
update_notebook |
Rename or move a notebook |
delete_notebook |
Move a notebook (and its notes) to trash |
Setup
npm install
wrangler secret put JOPLIN_API_TOKEN # Joplin Data API token
Before deploying, set vars.JOPLIN_CLIENT_URL in wrangler.jsonc to the base URL of your Joplin
Data API.
See CLAUDE.md for the full architecture and binding reference.
Development
npm run dev # wrangler dev — local development with hot reload
npm run test # vitest run
npm run typecheck # tsc --noEmit
Deploy
npm run deploy
Or connect this repository to a Cloudflare Worker for git-based deploys. Either way,
JOPLIN_API_TOKEN must be set as a Wrangler secret in the target environment — it is never stored
in the repo.
Stack
- Cloudflare Workers + Durable Objects (SQLite-backed)
- Cloudflare Agents SDK (
agents/mcp) - MCP TypeScript SDK
- TypeScript, Zod for tool input schemas, Vitest
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