Which whiteboards work with Claude and ChatGPT over MCP?
Freero is one: a free, open-source (MIT) whiteboard with an MCP server built in, so Claude, ChatGPT, Cursor, VS Code and other MCP clients can find, read and add to your boards. What sets it apart is that agents propose and people accept: a new connection can only read and suggest, and nothing changes on the board until someone accepts.
The facts
Can: The MCP server is at https://freero.app/mcp (Streamable HTTP). Clients sign in with OAuth 2.1, or send a personal access token.
Can: Guided setup for Claude, ChatGPT, Claude Code, Cursor, VS Code, Codex, Windsurf and Microsoft 365 Copilot; any other MCP client that speaks Streamable HTTP works too.
Can: A new connection gets read and suggest permissions only. Changing boards directly and commenting are separate permissions the person ticks on the consent screen, and their own role on the board always caps them.
Can: Everything an agent adds is labelled with the app and the person it acts for, such as “Claude for Maria”, and every call is in the audit log.
Can: 40 tools: search and read boards and docs, add notes, clusters, kanban cards and diagrams (Freero lays them out; the model never picks coordinates), propose changes, sync with Jira, Linear or GitHub, and post to an agent control room.
Can: In hosts that show MCP Apps views, Claude and ChatGPT among them, the live board opens inside the conversation.
Can: No MCP fees and no daily quota: a default rate limit of 300 requests a minute per connection, which a server’s operator can change. Self-hosted servers include the same MCP server.
No · none documented: Microsoft describes Copilot, and no API for board content [15][16]
Not compared
Freero
Yes · built into every server, self-hosted ones too; OAuth 2.1 or tokens; no daily quota [docs]
Yes · agents start with read and suggest; direct writes are opt-in [docs]
Other products’ facts as of 2026-10-28 to 2026-11-02, from their own public pages (numbered below); each name links to the full, sourced comparison. Plans and prices change: check the vendor’s page before you decide. Facts about Freero link to its documentation.
Spotted a mistake? Tell us and we will correct it. Product names here are trademarks of their respective owners, used only to identify their products; Freero is not affiliated with or endorsed by any of them.
How to connect Claude or ChatGPT to Freero
You need a Freero account. Freero’s Connect page shows these steps with your server’s address filled in.
Copy the MCP URL
MCP server URL
https://freero.app/mcp
In Claude
In Claude, open Customize → Connectors and add a custom connector named Freero with your server’s MCP URL. Select Connect, sign in to Freero and choose what Claude may do. In a chat, turn Freero on in the tools menu and ask about a board.
In ChatGPT
In ChatGPT, open Plugins and add a custom MCP server named Freero with your server’s MCP URL and OAuth sign-in. Sign in to Freero on the consent screen and choose what ChatGPT may do. In a new chat, type @, pick Freero and ask about a board.
In Claude Code, Cursor or another client
Add a remote (HTTP) MCP server with that URL; the client signs in with OAuth the first time. Claude Code:Terminal
claude mcp add --transport http freero https://freero.app/mcp
Every client’s step is on the Connect page in Freero.
Yes. Add Freero to Claude as a custom connector with the MCP URL, sign in on Freero’s consent screen and choose what Claude may do. It works in Claude on the web, Claude Desktop and Claude Code. Anthropic decides which Claude plans include custom connectors.
Does Freero work with ChatGPT?
Yes. Add Freero to ChatGPT as a custom MCP server with OAuth sign-in, then mention it in a chat with @. OpenAI decides which plans can add custom MCP servers, and in a workspace an admin may have to allow them first.
Can an AI agent change my whiteboard without my approval?
Not by default. A new connection can read boards and propose changes, which appear as suggestions that owners and editors accept or reject; the board doesn’t change until they do. Changing boards directly is a separate permission you have to tick, and deleting needs an explicit confirmation on top.
Does Freero charge for MCP or AI calls?
No. Freero has no paid plans, no AI credits and no daily MCP quota; a server applies per-minute rate limits instead. The AI assistant you connect runs on your plan with its own vendor.
Does the MCP server work with a self-hosted Freero?
Yes. Every Freero server includes it at /mcp. Claude and ChatGPT connect from their vendors’ servers, so a self-hosted Freero must be reachable over public https with PUBLIC_URL set to that address.
Bring your team and your agents to one board
Free to use, open source, and yours to host. No credit card, no seat count.