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How to integrate PDF Blocks MCP with Hermes

Connect Hermes to PDF Blocks MCP. Merge three pdfs and add watermark, split pdf into separate page files, and more using natural language, with authentication handled for you.

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PDF Blocks is a synchronous PDF processing API for merging, splitting, watermarking, securing, and reorganizing documents. Use it to automate PDF workflows with fast, programmatic operations.

17 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 PDF Blocks 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 PDF Blocks with

ChatGPT WorkClaude Cowork

What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,500+ 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 PDF Blocks 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 PDF Blocks

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

4. Done. You're all set with a new PDF Blocks 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 PDF Blocks or request any PDF Blocks-related task. It will prompt you to authenticate and authorize access.

5. Done!

What is the PDF Blocks MCP server, and what's possible with it?

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

Way Forward

With PDF Blocks 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 PDF Blocks action and event your agent gets out of the box.

Add Image Watermark

Add a PNG or JPEG image as a watermark on all or selected PDF pages.

Add PDF Password

Create an encrypted copy of a PDF that requires a password to open.

Add PDF Restrictions

Create an encrypted PDF copy with explicit permissions for copying, editing, printing, forms, assembly, and accessibility.

Add Text Watermark

Add up to three styled text lines as a watermark on all or selected PDF pages.

Extract PDF Pages

Create a PDF containing selected source pages in their original order.

Merge PDFs

Merge PDF files into one PDF in the exact order provided.

Remove PDF Pages

Create a PDF with selected pages removed while preserving the remaining page order.

Remove PDF Password

Create an unencrypted copy of a password-protected PDF using its current password.

Remove PDF Restrictions

Create a PDF copy with permission restrictions cleared.

Remove PDF Signatures

Create a PDF copy with all digital signatures and timestamps removed.

Reorder PDF Pages

Create a PDF in an exact page order, optionally dropping or repeating source pages.

Reverse PDF Pages

Create a PDF with the complete page order reversed.

Rotate PDF Pages

Rotate all or selected PDF pages by a supported multiple of 90 degrees.

Split PDF at Page

Split a PDF into exactly two downloadable PDFs at a page boundary; the selected page starts the second PDF.

Split PDF by Page Count

Split a PDF into consecutive downloadable PDFs containing up to a fixed number of pages each.

Split PDF by Page Groups

Create one downloadable PDF for each caller-defined ordered group of source pages.

Split PDF by Size

Split a PDF into downloadable PDFs no larger than a requested byte limit.

FRAMEWORKS

How to build PDF Blocks MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use PDF Blocks MCP with ChatGPT Work

Claude Cowork logo

Claude Cowork

Use PDF Blocks MCP with Claude Cowork

FAQ

Frequently asked questions

With a standalone PDF Blocks MCP server, the agents and LLMs can only access a fixed set of PDF Blocks tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from PDF Blocks 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 PDF Blocks tools.

Yes, absolutely. You can configure which PDF Blocks 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 PDF Blocks data and credentials are handled as safely as possible.

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