Canvs

Server Details

AI-powered diagrams, mind maps, flowcharts on a free unlimited collaborative whiteboard

Status: Healthy
Last Tested: 2026-03-05 22:31
Transport: Streamable HTTP
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Available Tools

13 tools

add_elementsInspect

Main method for creating canvas and adding elements. ⚠️ IMPORTANT: Call get_guide first and follow its instructions! If room_url is NOT provided - creates a NEW canvas and returns room_url. If room_url IS provided - adds elements to that canvas. IMPORTANT: When creating new canvas, ALWAYS include room_url in your response to the user! Element types: rectangle, ellipse, diamond, text, arrow, line. TEXT IN SHAPES: use containerId on text element pointing to shape id. ARROWS: Position at EDGE of source shape. Auto-bound within 30px. Colors: strokeColor, backgroundColor (hex).

ParametersJSON Schema

Name	Required	Description
`timeout`	No	Room lifetime in seconds (default: 3600, max: 86400). Only used when creating new canvas
`elements`	Yes	Array of element definitions to create
`room_url`	No	Room URL or ID. If not provided, creates a new canvas

add_elements_from_mermaidInspect

Add elements from Mermaid diagram. ⚠️ IMPORTANT: Call get_guide first and follow its instructions! If room_url is NOT provided - creates a NEW canvas and returns room_url. If room_url IS provided - adds diagram elements to that canvas. IMPORTANT: When creating new canvas, ALWAYS include room_url in your response to the user! Supports Flowchart, Sequence, and Class diagrams. FLOWCHART EXAMPLE: "flowchart TD\n A[Start] --> B{Decision}\n B -->|Yes| C[OK]\n B -->|No| D[Cancel]" SEQUENCE EXAMPLE: "sequenceDiagram\n Alice->>Bob: Hello\n Bob-->>Alice: Hi" CLASS EXAMPLE: "classDiagram\n class Animal{\n +name: string\n +eat()\n }\n Animal <|-- Dog"

ParametersJSON Schema

Name	Required	Description
`config`	No	Optional Mermaid configuration
`mermaid`	Yes	Mermaid diagram definition (flowchart, sequence, or class diagram)
`timeout`	No	Room lifetime in seconds (default: 3600, max: 86400). Only used when creating new canvas
`room_url`	No	Room URL or ID. If not provided, creates a new canvas

align_elementsInspect

Align elements on a canvas. Requires room_url from add_elements.

ParametersJSON Schema

Name	Required	Description
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on
`alignment`	Yes	Alignment direction
`elementIds`	Yes	Array of element IDs to align

delete_elementsInspect

Delete elements from a canvas. Requires room_url from add_elements. Pass ids array of element IDs to delete.

ParametersJSON Schema

Name	Required	Description	Default
`ids`	Yes	Array of element IDs to delete
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on

distribute_elementsInspect

Lay out elements sequentially without overlapping, with a 10% gap between each pair. First element stays as anchor, others are placed after it. Requires room_url from add_elements.

ParametersJSON Schema

Name	Required	Description
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on
`direction`	Yes	Distribution direction
`elementIds`	Yes	Array of element IDs to distribute

get_guideInspect

⚠️ MANDATORY FIRST STEP - Call this tool BEFORE using any other Canvs tools! Returns comprehensive instructions for creating whiteboards: tool selection strategy, iterative workflow, and examples. Following these instructions ensures correct diagrams.

ParametersJSON Schema

Name	Required	Description	Default
No parameters

get_imageInspect

Get SVG render of the canvas from the browser. Requires an active browser session.

ParametersJSON Schema

Name	Required	Description	Default
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on

group_elementsInspect

Group elements on a canvas. Requires room_url from add_elements.

ParametersJSON Schema

Name	Required	Description	Default
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on
`elementIds`	Yes	Array of element IDs to group

lock_elementsInspect

Lock elements on a canvas. Requires room_url from add_elements.

ParametersJSON Schema

Name	Required	Description	Default
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on
`elementIds`	Yes	Array of element IDs to lock

query_elementsInspect

Query elements on a canvas. Requires room_url from add_elements. Returns elements matching optional filters.

ParametersJSON Schema

Name	Required	Description
`type`	No	Filter by element type
`filter`	No	Additional key-value filters (e.g., {locked: true})
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on

ungroup_elementsInspect

Ungroup elements on a canvas. Pass element IDs — all groups containing those elements will be removed. Requires room_url from add_elements.

ParametersJSON Schema

Name	Required	Description	Default
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on
`elementIds`	Yes	Array of element IDs to ungroup

unlock_elementsInspect

Unlock elements on a canvas. Requires room_url from add_elements.

ParametersJSON Schema

Name	Required	Description	Default
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on
`elementIds`	Yes	Array of element IDs to unlock

update_elementsInspect

Update elements on a canvas. Requires room_url from add_elements. Pass elements array with id and fields to update.

ParametersJSON Schema

Name	Required	Description	Default
`elements`	Yes	Array of element updates (each must have id)
`room_url`	Yes	Room URL (from create_canvas) or room ID to operate on

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