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How to connect Eraser MCP to Claude

Connect Claude Web, Desktop and Cowork to Eraser MCP. Generate network diagram for microservices architecture, search workspace for authentication flow diagrams, and more using natural language, with authentication handled for you.

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Eraser MCP is a workspace for creating and managing technical diagrams and structured documents. It helps teams organize, version, and export diagrams with collaboration-focused tooling.

42 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Eraser account to Claude via Composio Connect, enabling it to generate network diagram for microservices architecture, search workspace for authentication flow diagrams, export all diagrams for release documentation, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Eraser MCP with

ChatGPTHermes

Connecting Eraser to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Eraser account

Back in Claude, ask it to connect to Eraser or give it any Eraser-related task.

For example, ask Claude to:

  • "Generate network diagram for microservices architecture"
  • "Search workspace for authentication flow diagrams"
  • "Export all diagrams for release documentation"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Eraser account is ready to use.

What is the Eraser Claude Connector, and what's possible with it?

The Eraser MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Eraser account. It provides structured and secure access so your agent can perform Eraser operations on your behalf.

Troubleshooting

1. Why does Claude not use the Composio connector for Eraser?

The connector can show as connected, but Claude must use it in each Eraser conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Eraser again.

2. Why does Claude show an MCP server error before Eraser connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Eraser.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Eraser.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Eraser authorization link not work?

The Composio connector is one server. Your Eraser account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Eraser connection.
  • Composio creates a fresh Eraser authorization link.
  • Open that link in your browser and finish the Eraser sign-in.

4. Why do Eraser actions fail after they worked before?

The Eraser connection can expire or lose permission.

  • Ask Claude to inspect the Eraser connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Eraser account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Eraser.
  • If the action still fails with a permission error, check that the connected account has that permission in Eraser itself.

5. How do I switch to a different Eraser account?

Claude can manage the Eraser connection for you.

  • Ask Claude to disconnect or delete the current Eraser account.
  • Ask Claude to connect Eraser again.
  • Open the new Composio authorization link for Eraser.
  • Sign in with the other Eraser account in the browser.
  • After the account connects, ask Claude to retry the Eraser task.

6. Why is my Eraser connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Eraser connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Eraser tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Eraser.
TOOLS

Supported Tools

Every Eraser MCP action and event your agent gets out of the box.

Add or remove template or reference

Attach or detach an EXISTING file as a template (style anchor) or reference (terminology/concept anchor) of a preset.

Create diagram

PREFERRED for creating a diagram from a natural-language prompt — Eraser's AI picks the diagram type, generates the DSL, and renders it.

Create document

PREFERRED for populating a document from a natural-language prompt — Eraser's AI generates the markdown.

Create file

Create an empty file, or duplicate an existing file when sourceFileId is provided.

Create folder

Create a new folder.

Create preset

Create a new preset (the team-level container for AI styling: templates, references, and rules).

Create template or reference

Create a new template (style anchor) or reference (terminology/concept anchor) file and, when `presetId` is provided, attach it to that preset in a single call.

Delete diagram

Delete a diagram from a file.

Delete document

Clear a file's document body to an empty markdown document.

Delete file

Archive a file.

Delete folder

Delete a folder.

Delete preset

Delete a preset.

Export diagram

Render a canvas diagram to PNG or JPEG and return a temporary image URL.

Export document

Export a file's markdown document body as a downloadable artifact.

Export file

Returns the Eraser file URL for PDF export.

Get diagram

Fetch a diagram's metadata and DSL/JSON code.

Get document

Fetch the full markdown body of a file's document.

Get file

Fetch a file's metadata, document outline (headers), and the list of diagrams in it.

Get folder

Fetch a folder by id.

Get me

Fetch the current user, active team, and team memberships.

Get preset

Fetch a preset including its rules, templates, and references.

Get template or reference

Fetch a template/reference's metadata, document outline, and diagram list.

List diagrams

List the diagrams contained in a file.

List files

List files in the team workspace, optionally scoped to a folder.

List folders

List folders.

List presets

List the team's presets.

List teams

List the teams the current user belongs to (OAuth only).

Manually create diagram

ADVANCED — most callers should use create_diagram instead.

Manually create document

ADVANCED — most callers should use create_document instead.

Manually update diagram

ADVANCED — most callers should use update_diagram instead.

Manually update document

ADVANCED — most callers should use update_document instead.

Manually update file

Replace a file's document markdown and/or diagram code in one call.

Publish template or reference

Publish a new version of a template/reference file.

Search

Full-text and semantic search across files or diagrams.

Select team

Set the active team for the session when the user belongs to multiple teams (OAuth only).

Update diagram

USE THIS for any user request that describes the change in natural language — verbs like 'add', 'remove', 'change', 'rename', 'recolor', 'make it more X', etc.

Update document

USE THIS for any user request that describes the change in natural language — verbs like 'add a section', 'rewrite the intro', 'fix the typo', 'remove the deprecated paragraph', etc.

Update file

Update file metadata (title, folder, sharing).

Update folder

Rename or move a folder, or bulk-apply a link-sharing setting to every file inside it (recursively).

Update preset

Rename a preset or update its metadata (`name`, `description`, `isDefault`).

Update rules

Add, update, or remove rules on a preset in a single batched call.

Update template or reference

Rename a template or reference file.

FRAMEWORKS

How to build Eraser MCP Agent with another framework

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ChatGPT

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Hermes logo

Hermes

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FAQ

Frequently asked questions

With a standalone Eraser MCP server, the agents and LLMs can only access a fixed set of Eraser tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Eraser and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Eraser tools.

Yes, absolutely. You can configure which Eraser scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Eraser data and credentials are handled as safely as possible.

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