# PDF Blocks

```json
{
  "name": "PDF Blocks",
  "slug": "pdf_blocks",
  "url": "https://composio.dev/toolkits/pdf_blocks",
  "markdown_url": "https://composio.dev/toolkits/pdf_blocks.md",
  "logo_url": "https://logos.composio.dev/api/pdf_blocks",
  "categories": [
    "document & file management"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-09-09T05:40:29.736Z"
}
```

![PDF Blocks logo](https://logos.composio.dev/api/pdf_blocks)

## Description

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with PDF Blocks MCP or direct API to merge PDFs, split documents, add watermarks, and secure files through natural language.

## Summary

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.

## Categories

- document & file management

## Toolkit Details

- Tools: 17

## Images

- Logo: https://logos.composio.dev/api/pdf_blocks

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for PDF Blocks.
  - Setup:
    - Configure Api Key credentials for PDF Blocks.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

- Merge three PDFs and add watermark
- Split PDF into separate page files
- Protect PDF with password and permissions

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `PDF_BLOCKS_ADD_IMAGE_WATERMARK` | Add Image Watermark | Add a PNG or JPEG image as a watermark on all or selected PDF pages. |
| `PDF_BLOCKS_ADD_PASSWORD` | Add PDF Password | Create an encrypted copy of a PDF that requires a password to open. |
| `PDF_BLOCKS_ADD_RESTRICTIONS` | Add PDF Restrictions | Create an encrypted PDF copy with explicit permissions for copying, editing, printing, forms, assembly, and accessibility. Permissions are allowed by default; set an allow_* parameter to false to restrict that capability. |
| `PDF_BLOCKS_ADD_TEXT_WATERMARK` | Add Text Watermark | Add up to three styled text lines as a watermark on all or selected PDF pages. |
| `PDF_BLOCKS_EXTRACT_PAGES` | Extract PDF Pages | Create a PDF containing selected source pages in their original order. |
| `PDF_BLOCKS_MERGE_PDFS` | Merge PDFs | Merge PDF files into one PDF in the exact order provided. |
| `PDF_BLOCKS_REMOVE_PAGES` | Remove PDF Pages | Create a PDF with selected pages removed while preserving the remaining page order. |
| `PDF_BLOCKS_REMOVE_PASSWORD` | Remove PDF Password | Create an unencrypted copy of a password-protected PDF using its current password. |
| `PDF_BLOCKS_REMOVE_RESTRICTIONS` | Remove PDF Restrictions | Create a PDF copy with permission restrictions cleared. |
| `PDF_BLOCKS_REMOVE_SIGNATURES` | Remove PDF Signatures | Create a PDF copy with all digital signatures and timestamps removed. |
| `PDF_BLOCKS_REORDER_PAGES` | Reorder PDF Pages | Create a PDF in an exact page order, optionally dropping or repeating source pages. |
| `PDF_BLOCKS_REVERSE_PAGES` | Reverse PDF Pages | Create a PDF with the complete page order reversed. |
| `PDF_BLOCKS_ROTATE_PAGES` | Rotate PDF Pages | Rotate all or selected PDF pages by a supported multiple of 90 degrees. |
| `PDF_BLOCKS_SPLIT_PDF_AT_PAGE` | Split PDF at Page | Split a PDF into exactly two downloadable PDFs at a page boundary; the selected page starts the second PDF. |
| `PDF_BLOCKS_SPLIT_PDF_BY_PAGE_COUNT` | Split PDF by Page Count | Split a PDF into consecutive downloadable PDFs containing up to a fixed number of pages each. |
| `PDF_BLOCKS_SPLIT_PDF_BY_PAGE_GROUPS` | Split PDF by Page Groups | Create one downloadable PDF for each caller-defined ordered group of source pages. |
| `PDF_BLOCKS_SPLIT_PDF_BY_SIZE` | Split PDF by Size | Split a PDF into downloadable PDFs no larger than a requested byte limit. |

## Supported Triggers

None listed.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK
```python
pip install composio_openai
```

```typescript
npm install @composio/openai
```

#### Path 1, Step 2: Initialize Composio and Create Tool Router Session

Import and initialize Composio client, then create a Tool Router session
```python
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
openai = OpenAI()
session = composio.create(user_id='your-user-id')
```

```typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
```

#### Path 1, Step 3: Execute PDF Blocks Tools via Tool Router with Your Agent

Get tools from Tool Router session and execute PDF Blocks actions with your Agent
```python
tools = session.tools
response = openai.responses.create(
  model='gpt-4.1',
  tools=tools,
  input=[{
    'role': 'user',
    'content': "Merge these three PDFs into a single PDF and add the watermark 'CONFIDENTIAL' to every page"
  }]
)
result = composio.provider.handle_tool_calls(
  response=response,
  user_id='your-user-id'
)
print(result)
```

```typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: "Merge these three PDFs into a single PDF and add the watermark 'CONFIDENTIAL' to every page"
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK for Python or TypeScript
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
```

#### Path 2, Step 2: Initialize Client and Create Tool Router Session

Import and initialize the Composio client, then create a Tool Router session for PDF Blocks
```python
from composio import Composio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions

# Initialize Composio with your Composio API key
composio = Composio(api_key='your-composio-api-key')
# Create a Tool Router session for the user
session = composio.create(user_id='your-user-id')
url = session.mcp.url

# Optional: helper method names you can use to configure credentials and accounts
# auth_config = composio.auth_configs.create(name='pdfblocks-api-key', scheme='api_key', config={'api_key': 'YOUR_PDFBLOCKS_API_KEY'})
# connected_account = composio.connected_accounts.link(auth_config_id=auth_config.id, user_id='your-user-id')
```

```typescript
import { Composio } from '@composio/core';

const composio = new Composio({ apiKey: 'your-api-key' });
const session = await composio.create('your-user-id');
console.log(`Tool Router session created: ${session.mcp.url}`);

// Optional: helper method names you can use to configure credentials and accounts
// const authConfig = await composio.auth_configs.create({ name: 'pdfblocks-api-key', scheme: 'api_key', config: { api_key: 'YOUR_PDFBLOCKS_API_KEY' } });
// const connectedAccount = await composio.connected_accounts.link({ auth_config_id: authConfig.id, user_id: 'your-user-id' });
```

#### Path 2, Step 3: Connect to AI Agent

Use the MCP server with your AI agent (Anthropic Claude or Mastra)
```python
import asyncio

options = ClaudeAgentOptions(
    permission_mode='bypassPermissions',
    mcp_servers={
        'tool_router': {
            'type': 'http',
            'url': url,
            'headers': {
                'x-api-key': 'your-composio-api-key'
            }
        }
    },
    system_prompt='You are a helpful assistant with access to PDF Blocks tools.',
    max_turns=10
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query('Merge two PDFs, apply watermark "CONFIDENTIAL", and return the merged file link')
        async for message in client.receive_response():
            if hasattr(message, 'content'):
                for block in message.content:
                    if hasattr(block, 'text'):
                        print(block.text)

asyncio.run(main())
```

```typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: session.mcp.url,
    headers: {
      'x-api-key': 'your-composio-api-key',
    },
  },
});

const tools = await client.tools();
const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{
    role: 'user',
    content: 'Split this PDF into single-page files and return download links'
  }],
  maxSteps: 5,
});

console.log(`Agent: ${text}`);
```

## Why Use Composio?

### 1. AI Native PDF Blocks Integration

- Supports both PDF Blocks MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable tool execution
- Rich coverage for reading, writing, and querying your PDF Blocks data

### 2. Managed Auth

- Built-in OAuth handling with automatic token refresh and rotation
- Central place to manage, scope, and revoke PDF Blocks access
- Per user and per environment credentials instead of hard-coded keys

### 3. Agent Optimized Design

- Tools are tuned using real error and success rates to improve reliability over time
- Comprehensive execution logs so you always know what ran, when, and on whose behalf

### 4. Enterprise Grade Security

- Fine-grained RBAC so you control which agents and users can access PDF Blocks
- Scoped, least privilege access to PDF Blocks resources
- Full audit trail of agent actions to support review and compliance

## Use PDF Blocks with any AI Agent Framework

Choose a framework you want to connect PDF Blocks with:

- [ChatGPT Work](https://composio.dev/toolkits/pdf_blocks/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/pdf_blocks/framework/claude-cowork)
- [Hermes](https://composio.dev/toolkits/pdf_blocks/framework/hermes-agent)

## Related Toolkits

- [Google Drive](https://composio.dev/toolkits/googledrive) - Google Drive is a cloud storage platform for uploading, sharing, and collaborating on files. It's perfect for keeping your documents accessible and organized across devices.
- [Google Docs](https://composio.dev/toolkits/googledocs) - Google Docs is a cloud-based word processor that enables document creation and real-time collaboration. Its seamless sharing and version history make team editing and content management a breeze.
- [Google Super](https://composio.dev/toolkits/googlesuper) - Google Super is an all-in-one suite combining Gmail, Drive, Calendar, Sheets, Analytics, and more. It gives you a unified platform to manage your digital life, boosting productivity and organization.
- [ActiveMerge](https://composio.dev/toolkits/active_merge) - ActiveMerge is a document automation platform for generating documents, images, merged files, and e-signature workflows. It helps teams turn templates and stored files into finished, shareable documents faster.
- [Affinda](https://composio.dev/toolkits/affinda) - Affinda is an AI-powered document processing platform that automates data extraction from resumes, invoices, and more. It streamlines document-heavy workflows by turning files into structured, actionable data.
- [Agility cms](https://composio.dev/toolkits/agility_cms) - Agility CMS is a headless content management system for building and managing digital experiences across platforms. It lets teams update content quickly and deliver omnichannel experiences with ease.
- [Airparser](https://composio.dev/toolkits/airparser) - Airparser is an AI-powered parser for extracting structured data from emails, documents, PDFs, and files. It turns messy inbound content into clean fields your apps and workflows can use.
- [Algodocs](https://composio.dev/toolkits/algodocs) - Algodocs is an AI-powered platform that automates data extraction from business documents. It delivers fast, secure, and accurate processing without templates or manual training.
- [Api2pdf](https://composio.dev/toolkits/api2pdf) - Api2Pdf is a REST API for generating PDFs from HTML, URLs, and documents using powerful engines like wkhtmltopdf and Headless Chrome. It streamlines document conversion and automation for developers and businesses.
- [Aryn](https://composio.dev/toolkits/aryn) - Aryn is an AI-powered platform for parsing, extracting, and analyzing data from unstructured documents. Use it to automate document processing and unlock actionable insights from your files.
- [Boldsign](https://composio.dev/toolkits/boldsign) - Boldsign is a digital eSignature platform for sending, signing, and tracking documents online. Organizations use it to automate agreements and manage legally binding workflows efficiently.
- [Boloforms](https://composio.dev/toolkits/boloforms) - BoloForms is an eSignature platform built for small businesses, offering unlimited signatures, templates, and forms. It simplifies digital document signing and team collaboration at a predictable, fixed price.
- [Box](https://composio.dev/toolkits/box) - Box is a cloud content management and file sharing platform for businesses. It helps teams securely store, organize, and collaborate on files from anywhere.
- [Box MCP](https://composio.dev/toolkits/box_mcp) - Box MCP is Box's hosted MCP server that exposes enterprise files, folders, and metadata. It provides secure, centralized access to corporate content for search and management.
- [Carbone](https://composio.dev/toolkits/carbone) - Carbone is a blazing-fast report generator that turns JSON data into PDFs, Word docs, spreadsheets, and more using flexible templates. It lets you automate document creation at scale with minimal code.
- [Castingwords](https://composio.dev/toolkits/castingwords) - CastingWords is a transcription service specializing in human-powered, accurate transcripts via a simple API. Get seamless audio-to-text conversion for interviews, meetings, podcasts, and more.
- [CertSeal](https://composio.dev/toolkits/cert_seal) - CertSeal is an API platform for issuing and managing verifiable digital certificates. Use it to automate trusted certificate workflows for recipients, batches, designs, and webhooks.
- [Cloudconvert](https://composio.dev/toolkits/cloudconvert) - CloudConvert is a powerful file conversion service supporting over 200 file formats. It streamlines converting, compressing, and managing documents, media, and more, all in one place.
- [Cloudlayer](https://composio.dev/toolkits/cloudlayer) - Cloudlayer is a document and asset generation service for creating PDFs and images via API or SDKs. It lets you automate high-quality doc creation, saving dev time and reducing manual work.
- [CloudPDF](https://composio.dev/toolkits/cloud_pdf) - CloudPDF is an API platform for creating, uploading, managing, and sharing PDF documents. Use it to build secure PDF workflows with webhooks, share links, and access control.

## Frequently Asked Questions

### Do I need my own developer credentials to use PDF Blocks with Composio?

Yes, PDF Blocks requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

---
[See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)