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

Features and capabilities supported by this server

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.

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

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