PSPDFKit/nutrient-dws-mcp-server

Nutrient DWS MCP Server

Give AI agents the power to process, sign, and transform documents.

A Model Context Protocol (MCP) server that connects AI assistants to the Nutrient Document Web Service (DWS) Processor API — enabling document creation, editing, conversion, digital signing, OCR, redaction, and more through natural language.

What You Can Do

Once configured, you (or your AI agent) can process documents through natural language:

You: "Merge report-q1.pdf and report-q2.pdf into a single document" AI: "Done! I've merged both reports into combined-report.pdf (24 pages total)."

You: "Redact all social security numbers and email addresses from application.pdf" AI: "I found and redacted 5 SSNs and 3 email addresses. The redacted version is saved as application-redacted.pdf."

You: "Digitally sign this contract with a visible signature on page 3" AI: "I've applied a PAdES-compliant digital signature to contract.pdf. The signed document is saved as contract-signed.pdf."

You: "Convert this PDF to markdown" AI: "Here's the markdown content extracted from your document..."

You: "OCR this scanned document in German and extract the text" AI: "I've processed the scan with German OCR. Here's the extracted text..."

Quick Start

1. Get a Nutrient API Key

Sign up for free at nutrient.io/api.

2. Configure Your AI Client

Choose your platform and add the configuration:

{
  "mcpServers": {
    "nutrient-dws": {
      "command": "npx",
      "args": ["-y", "@nutrient-sdk/dws-mcp-server"],
      "env": {
        "NUTRIENT_DWS_API_KEY": "YOUR_API_KEY_HERE",
        "SANDBOX_PATH": "/your/sandbox/directory"
        // "C:\\your\\sandbox\\directory" for Windows
      }
    }
  }
}

{
  "mcpServers": {
    "nutrient-dws": {
      "command": "npx",
      "args": ["-y", "@nutrient-sdk/dws-mcp-server"],
      "env": {
        "NUTRIENT_DWS_API_KEY": "YOUR_API_KEY_HERE",
        "SANDBOX_PATH": "/your/project/documents"
        // "C:\\your\\project\\documents" for Windows
      }
    }
  }
}

{
  "mcpServers": {
    "nutrient-dws": {
      "command": "npx",
      "args": ["-y", "@nutrient-sdk/dws-mcp-server"],
      "env": {
        "NUTRIENT_DWS_API_KEY": "YOUR_API_KEY_HERE",
        "SANDBOX_PATH": "/your/sandbox/directory"
        // "C:\\your\\sandbox\\directory" for Windows
      }
    }
  }
}

{
  "mcp": {
    "servers": {
      "nutrient-dws": {
        "command": "npx",
        "args": ["-y", "@nutrient-sdk/dws-mcp-server"],
        "env": {
          "NUTRIENT_DWS_API_KEY": "YOUR_API_KEY_HERE",
          "SANDBOX_PATH": "${workspaceFolder}"
        }
      }
    }
  }
}

NUTRIENT_DWS_API_KEY=your_key SANDBOX_PATH=/your/path npx @nutrient-sdk/dws-mcp-server

3. Restart Your AI Client

Restart the application to pick up the new MCP server configuration.

4. Start Processing Documents

Drop documents into your sandbox directory and start giving instructions!

Available Tools

Document Processor Capabilities

Use with AI Agent Frameworks

This MCP server works with any platform that supports the Model Context Protocol:

• Claude Desktop — Direct MCP integration
• Cursor — AI-powered IDE with MCP support
• Windsurf — AI-powered IDE with MCP support
• VS Code + Copilot — GitHub Copilot MCP integration
• LangChain / LangGraph — Via MCP tool adapters
• OpenAI Agents SDK — Via MCP server integration
• Custom agents — Any MCP-compatible system

Why Nutrient?

The Read-Write Gap

AI can read and understand documents — but most tools stop there. Nutrient gives AI agents the ability to actually manipulate documents: merge, redact, sign, watermark, convert formats, extract structured data, and more.

• Beyond PDF reading — Not just text extraction. Full document creation, editing, and transformation.
• Production-grade — Trusted by thousands of companies for mission-critical document processing.
• Standards-compliant — PAdES digital signatures, PDF/A archiving, PDF/UA accessibility.
• Cloud-native — No infrastructure to manage. Send documents to the API, get results back.
• Comprehensive redaction — Built-in presets for SSNs, credit cards, phone numbers, emails, dates, and more.
• Multi-format — Process PDFs, Office documents, images, HTML, and Markdown.

Configuration

Sandbox Mode (Recommended)

The server supports sandbox mode that restricts file operations to a specific directory. Set the SANDBOX_PATH environment variable to enable it:

export SANDBOX_PATH=/path/to/sandbox/directory
npx @nutrient-sdk/dws-mcp-server

When sandbox mode is enabled:

• Relative paths resolve relative to the sandbox directory
• All input file paths are validated to ensure they reside in the sandbox
• Processed files are saved within the sandbox

Note: If no sandbox directory is specified, the server operates without file path restrictions. Sandbox mode is strongly recommended for security.

Output Location

Processed files are saved to a location determined by the AI. To guide output placement, use natural language (e.g., "save the result to output/result.pdf") or create an output directory in your sandbox.

Environment Variables

Troubleshooting

Server not appearing in Claude Desktop?

• Ensure Node.js 18+ is installed (node --version)
• Check the config file path is correct for your OS
• Restart Claude Desktop completely (check Task Manager/Activity Monitor)

"API key invalid" errors?

• Verify your API key at dashboard.nutrient.io
• Ensure the key is set correctly in the env section (no extra spaces)

Files not found?

• Check that SANDBOX_PATH points to an existing directory
• Ensure your documents are inside the sandbox directory
• Use the sandbox_file_tree tool to verify visible files

Contributing

Please see the contribution guidelines in .

License

MIT License — see for details.