Excalidraw Architect MCP vs Portravo

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create_diagram

Create a new Excalidraw diagram of any supported type. Two input modes: 1. **Graph types** (``architecture``, ``flowchart``) - pass ``nodes`` and ``connections``. The tool handles layout, styling, and rendering; no coordinates needed. 2. **Typed diagrams** (every other type) - pass ``diagram_type`` and a ``spec`` object shaped for that type. Call ``list_diagram_types`` to choose a type and ``get_diagram_schema`` to see its spec shape.

mermaid_to_excalidraw

Convert Mermaid flowchart syntax into an Excalidraw diagram. Supports the mermaid flowchart subset that AI agents commonly generate: - Directions: graph TD, LR, BT, RL - Node shapes: [text], {text}, ((text)), ([text]) - Edge types: -->, ---, -.-> ==> with |label| - Subgraphs: subgraph Title ... end Component types are auto-detected from node labels (e.g., a node labeled "PostgreSQL DB" automatically gets database styling).

modify_diagram

Modify an existing Excalidraw diagram created by this tool. Supports iterative editing: add components, remove nodes, update labels, and rewire connections - without recreating the entire diagram. IMPORTANT: Call get_diagram_info first to understand the current diagram state before making modifications. For **typed diagrams** (sequence, pyramid, bar, swimlane, ...) there is a single operation: {"op": "update_spec", "patch": {"tiers": [...], "title": "New title"}} The patch is deep-merged into the stored spec and the diagram re-rendered. Lists are replaced wholesale, so send the complete list to change one entry. The node/connection operations below apply to architecture and flowchart diagrams only.