Schema | JSON Canvas MCP Server

JSON Canvas MCP Server

Describes the environment variables required to run the server.

Name	Required	Description	Default
`FORMAT`	No	Default output format for canvas files	json
`OUTPUT_PATH`	No	Directory where canvas files will be saved	./output

Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.

This server publishes no instructions, or was last inspected before Glama recorded them.

Features and capabilities supported by this server

Protocol revision2025-11-25

Capability	Details
`tools`	{ "listChanged": false }
`prompts`	{ "listChanged": false }
`resources`	{ "subscribe": false, "listChanged": false }
`experimental`	{}

Functions exposed to the LLM to take actions

Name	Description
create_canvasC	Create a JSON Canvas from nodes (and optional edges) and write it as a date-prefixed .canvas file under OUTPUT_PATH.
validate_canvasB	Validate canvas data against the JSON Canvas 1.0 specification.
read_canvasB	Read a .canvas file from OUTPUT_PATH and return its nodes and edges.
list_canvasesA	List the .canvas files available in OUTPUT_PATH.
edit_canvasA	Edit a stored .canvas file: add, update, and/or remove nodes and edges in one atomic write. Operations apply in order — add_nodes, update_nodes, add_edges, update_edges, remove_edge_ids, remove_node_ids — and removing a node also removes its connected edges. If any operation fails the file is left unchanged. Returns the updated canvas.
export_canvasA	Export a stored canvas to another format: 'markdown' (an outline that follows the edges) or 'svg' (a standalone vector image). SVG renders each node's title line only.
search_canvasesA	Case-insensitive substring search across stored canvases. Matches node text, labels, file paths, URLs, and IDs, plus edge labels. Searches every canvas in OUTPUT_PATH unless a filename is given.

Interactive templates invoked by user choice

Name	Description
No prompts

Contextual data attached and managed by the client

Name	Description
`canvas_schema`	JSON Schema for validating canvas files.
`canvas_viewer`	Interactive read-only viewer for a JSON Canvas (MCP Apps UI).
`basic_example`	A simple canvas with two text nodes connected by an edge.

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/Cam10001110101/obsidian-jsoncanvas'

If you have feedback or need assistance with the MCP directory API, please join our Discord server