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Connecting Pastel to Claude

Add Pastel to Claude so it can read your canvases and comments, reply to feedback and resolve it for you.

Written by Valentin Staykov

These instructions cover Claude.ai, the Claude desktop app, and the Claude Code CLI. New to this? Start with Using the Pastel MCP server for an overview of what Claude will be able to do once it's connected.

You'll need: a Pastel account, and Pastel's MCP server URL:

https://api.usepastel.com/mcp

Claude.ai and Claude Desktop

  1. Go to Customize → Connectors, then click Add → Add custom connector.

  2. Name the server Pastel.

  3. Enter the MCP server URL: https://api.usepastel.com/mcp

  4. Click Add.

  5. Click Connect, then complete the authorization flow to sign in to Pastel and approve access.

Claude Code CLI

  1. Open your terminal.

  2. Run claude mcp add --transport http pastel https://api.usepastel.com/mcp

  3. Run claude mcp login pastel

  4. Complete the authorization flow in the browser window that opens.

Check that it worked

Start a new conversation and ask Claude:

List my Pastel canvases.

If Claude comes back with your canvases, you're connected. If it says it doesn't have access to Pastel, start a fresh conversation, as agents usually only pick up new tools at the start of a chat.

Get the most out of it

Claude Code runs in your codebase, which is where this really pays off. Try pointing it at a comment and letting it take the whole thing:

Take comment #14 on the pricing page canvas. Work out what's causing it, fix it, reply on the comment explaining what you changed, and mark it resolved.

Pastel sends Claude a canvas-specific investigation guide with every comment (which page to open, which element the comment is pinned to, where the screenshot is), so you don't need to explain any of that yourself.

You can also hand it a whole batch:

Go through the unresolved comments on the staging canvas, fix the ones that are clearly CSS issues, and leave the rest for me with a reply saying why.

Managing your connection

Every agent you've connected is listed in the MCP section of your Pastel profile settings, and can be disconnected there at any time.

Claude only ever sees the canvases and comments that you can see, because it acts as you.

Something not working?

Claude changes quickly and these steps can fall out of date. If a menu isn't where we've said it is, or the connection won't complete, let us know and we'll help you out.

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