Draw diagrams and flowcharts on a shared board you and Muse can edit together
Connects to a shared Excalidraw whiteboard hosted by Holon. Muse can read a board, add boxes, text, arrows and frames, erase shapes, and place images, so you can sketch a diagram or flowchart together in real time and open it in the browser.
Try asking Muse: "Sketch a flowchart of our onboarding steps on a shared board I can open in the browser."
Source: Found in the official MCP Registry (io.github.holon-sh/excalidraw) · First listed November 15, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 11 min ago.
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://excalidraw.holonlabs.io/mcp/excalidrawNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Excalidraw is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
In Claude, open Settings, then Connectors.
Choose Add custom connector, give it a name, and paste the link.
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://excalidraw.holonlabs.io/mcp/excalidrawResponse time at the last check: 157ms. Worked in n/a of checks over 30 days.
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
read_boardRead a shared Excalidraw board and open it. Returns its shapes and the URL where anyone can watch and edit it live. Leave out board to start a new one.drawDraw on a board: boxes (rectangle, ellipse, diamond), text, arrows between two shapes, and frames that hold shapes under a name. Everyone with the board open sees it at once. Give shapes your own short ids to join them with arrows and put them in frames in the same call. Leave oueraseErase shapes from a board by id. An arrow attached to an erased shape stays, so erase it too if it should go. The shapes in an erased frame stay.syncFor the board's page: send the Excalidraw elements it changed and where its pointer is. With since, also receive the elements changed elsewhere and everyone else's cursors.put_imageFor the board's page: store the file of an image on the board, as a data URL.get_imageFor the board's page: read the file of an image on the board, as a data URL. Without one, the board has no such file.https://excalidraw.holonlabs.io/mcp/excalidrawNot in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Excalidraw to help me. It is a free service with an MCP server at https://excalidraw.holonlabs.io/mcp/excalidraw. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
At the last check (November 15, 2026, 01:31 UTC) the endpoint was working, answering in 157ms. It is checked every 15 minutes.
It was screened on November 15, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
It exposes 6 tools, including read_board, draw, erase, sync. For example, you could ask Muse: "Sketch a flowchart of our onboarding steps on a shared board I can open in the browser."
This listing was added from public sources (Found in the official MCP Registry (io.github.holon-sh/excalidraw)). If you build Excalidraw, claim it to correct the details and get your badge.
Paste this on your site or README. It always shows the latest check.
<a href="https://musedirectory.ai/connector/excalidraw"><img src="https://musedirectory.ai/badge/excalidraw.svg" alt="Excalidraw on musedirectory.ai" width="236" height="40"></a>