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Nutrient DWS MCP Server

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Nutrient DWS MCP Server

Document workflows using natural language

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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..."

Related MCP server: Office Word MCP Server

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:

Open Settings → Developer → Edit Config, then add:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{ "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 } } } }

Create .cursor/mcp.json in your project root:

{ "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 } } } }

Add to ~/.codeium/windsurf/mcp_config.json:

{ "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 } } } }

Add to .vscode/settings.json in your project:

{ "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}" } } } } }

Any MCP-compatible client can connect using stdio transport:

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

Tool

Description

document_processor

All-in-one document processing: merge PDFs, convert formats, apply OCR, watermark, rotate, redact, flatten annotations, extract text/tables/key-value pairs, and more

document_signer

Digitally sign PDFs with PAdES-compliant CMS or CAdES signatures, with customizable visible/invisible signature appearances

sandbox_file_tree

Browse files in the sandbox directory (when sandbox mode is enabled)

directory_tree

Browse directory contents (when sandbox mode is disabled)

Document Processor Capabilities

Feature

Description

Document Creation

Merge PDFs, Office docs (DOCX, XLSX, PPTX), and images into a single document

Format Conversion

PDF ↔ DOCX, images (PNG, JPEG, WebP), PDF/A, PDF/UA, HTML, Markdown

Editing

Watermark (text/image), rotate pages, flatten annotations

Security

Redact sensitive data (SSNs, credit cards, emails, etc.), password protection, permission control

Data Extraction

Extract text, tables, or key-value pairs as structured JSON

OCR

Multi-language optical character recognition for scanned documents

Optimization

Compress and linearize PDFs without quality loss

Annotations

Import XFDF annotations, flatten annotations

Digital Signing

PAdES-compliant CMS and CAdES digital signatures (via document_signer tool)

Use with AI Agent Frameworks

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

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

Variable

Required

Description

NUTRIENT_DWS_API_KEY

Yes

Your Nutrient DWS API key (get one free)

SANDBOX_PATH

Recommended

Directory to restrict file operations to

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 CONTRIBUTING.md.

License

MIT License — see LICENSE for details.

Install Server
A
security – no known vulnerabilities
A
license - permissive license
A
quality - confirmed to work

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