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tldraw

io.github.tldraw/tldraw
Design & Creative Productivity Public & reachable MCP 2025-11-25

What this MCP does

Creates, edits, searches, and persists collaborative diagrams and visual content on tldraw canvases.

Capabilities

Tools

6 tools
exec
Execute Code
Execute JavaScript code on a tldraw canvas. The code runs in the widget with access to the live `editor` instance, helper functions, and normal js. Use the `search` tool first to discover available Editor methods and shape types. Each canvas has a unique `canvasId`. Omit `canvasId` to create a new blank canvas. To edit an existing canvas, pass the `canvasId` that was returned by a previous exec call. Shapes and text grow depending on the amount of text they have. Use clever scripting to ensure there are no unintended overlaps. Examples: - Create a rectangle: editor.createShape({ _type: 'rectangle', shapeId: 'box1', x: 200, y: 120, w: 320, h: 180, text: 'Hello' }) - Connect shapes with an arrow: editor.createShape({ _type: 'arrow', shapeId: 'a1', fromId: 'box1', toId: 'box2', x1: 0, y1: 0, x2: 100, y2: 0 }) - Select and zoom: editor.select('box1'); editor.zoomToSelection() - Read shapes: return editor.getCurrentPageShapes() - Distribute evenly: editor.distributeShapes(editor.getSelectedShapeIds(), 'horizontal') - Box around shapes: boxShapes(['box1', 'box2'], { text: 'Group label', color: 'blue' }) - Stack shapes dynamically: editor.createShape({ _type: 'rectangle', shapeId: 'a', x: 0, y: 0, w: 300, h: 200, text: 'First box\nwith wrapping text' }); const bounds = editor.getShapePageBounds('a'); editor.createShape({ _type: 'rectangle', shapeId: 'b', x: 0, y: bounds.maxY + 20, w: 300, h: 200, text: 'Below first' })
Input schema 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['code'], 'properties': {'code': {'type': 'string', 'description': 'JavaScript code to execute. Has access to `editor` (tldraw Editor instance) and helper functions.'}, 'canvasId': {'type': 'string', 'description': 'Canvas ID to edit. Omit to create a new blank canvas. Pass a canvasId from a previous exec result to continue editing that canvas.'}}}
_exec_callback
Exec Callback
App-only: widget calls this to resolve a pending exec request.
Input schema 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['channel'], 'properties': {'error': {'type': 'string'}, 'result': {'type': 'object', 'required': ['success'], 'properties': {'error': {'type': 'string'}, 'result': {}, 'success': {'type': 'boolean'}, 'canvasId': {'type': 'string'}}}, 'channel': {'type': 'string'}, 'execKey': {'type': 'string'}}}
_get_canvas_state
Get Canvas State
App-only: get the latest checkpoint for a canvas by its canvasId.
Read only Idempotent
Input schema 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['canvasId'], 'properties': {'canvasId': {'type': 'string', 'minLength': 1}}}
read_checkpoint
Read Checkpoint
App-only: read shapes from a checkpoint by ID.
Read only Idempotent
Input schema 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['checkpointId'], 'properties': {'checkpointId': {'type': 'string', 'minLength': 1}}}
save_checkpoint
Save Checkpoint
App-only: save shapes to a checkpoint (from user edits). shapesJson and assetsJson must be JSON array strings.
Input schema 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['checkpointId', 'shapesJson'], 'properties': {'canvasId': {'type': 'string'}, 'assetsJson': {'type': 'string'}, 'shapesJson': {'type': 'string'}, 'bindingsJson': {'type': 'string'}, 'checkpointId': {'type': 'string', 'minLength': 1}}}
search
Search Editor API
Search the tldraw Editor API spec by writing JavaScript that receives a `spec` object and returns a result. The spec contains: spec.members (all Editor methods/properties with name, kind, signature, description, category), spec.categories (category names), spec.types.shapes (focused shape type definitions with props), spec.types.shapeTypes (list of all shape type strings), spec.helpers (exec helper functions with descriptions, params, examples). Examples: - Find shape methods: return spec.members.filter(m => m.category === "shapes").map(m => ({ name: m.name, signature: m.signature })) - Get arrow shape props: return spec.types.shapes.find(s => s.shapeType === "arrow") - List all categories: return spec.categories - Find a helper: return spec.helpers.find(h => h.name === "createArrowBetweenShapes")
Read only Idempotent
Input schema 
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['code'], 'properties': {'code': {'type': 'string', 'description': 'JavaScript code that receives `spec` and returns a result. Must use `return` to produce output.'}}}
History

Recent tool changes

Added
save_checkpoint
Sept. 17, 2026, 12:52 p.m.
Added
read_checkpoint
Sept. 17, 2026, 12:52 p.m.
Added
_get_canvas_state
Sept. 17, 2026, 12:52 p.m.
Added
_exec_callback
Sept. 17, 2026, 12:52 p.m.
Added
exec
Sept. 17, 2026, 12:52 p.m.
Added
search
Sept. 17, 2026, 12:52 p.m.
Discover

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