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How to integrate Eraser MCP with Hermes

Connect Hermes 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

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.

This guide explains the easiest and most robust way to connect your Eraser account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

Also integrate Eraser MCP with

ChatGPT WorkClaude Cowork

What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,000+ applications directly into their agent harness — including Hermes. It can:

  • Search and load tools from relevant toolkits on-demand, reducing context usage.
  • Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
  • Manage app authentication end-to-end with zero manual overhead.

Integrating Eraser with Hermes

Using Composio Connect CLI

1. Install the Composio CLI

Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

bash
curl -fsSL https://composio.dev/install | bash
Hermes authenticating with Composio

2. Authenticate

Once the CLI is installed, ask Hermes to authenticate with Composio.

3. Connect to Eraser

Ask your agent to connect to Eraser, or simply request any Eraser-related task. Hermes will prompt you to authenticate and authorize access.

4. Done. You're all set with a new Eraser connection.

Using Composio Connect MCP

1. Get your MCP URL and API Key

Go to dashboard.composio.dev and copy your Connect MCP URL and API key.

Copy MCP URL and API key from Composio dashboard

2. Open the Hermes config file

bash
nano ~/.hermes/config.yaml

3. Add the Composio Connect MCP server

bash
mcp_servers:
  composio:
    url: "https://connect.composio.dev/mcp"
    headers:
      x-consumer-api-key: "YOUR_COMPOSIO_API_KEY"
    connect_timeout: 60
    timeout: 180

Save with Ctrl + O, Enter, then exit with Ctrl + X.

4. Restart your Hermes agent

Once restarted, ask your agent to connect to Eraser or request any Eraser-related task. It will prompt you to authenticate and authorize access.

5. Done!

What is the Eraser MCP server, 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.

Way Forward

With Eraser connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.

From here, you can extend Hermes further:

  • Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
  • Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
  • Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.

If you run into trouble or want to share what you've built, join the community or check out the Docs for deeper configuration options.

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

ChatGPT Work logo

ChatGPT Work

Use Eraser MCP with ChatGPT Work

Claude Cowork logo

Claude Cowork

Use Eraser MCP with Claude Cowork

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. Hermes 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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