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+# Upstage Document AI Plugin
+
+Advanced Document AI plugin using Upstage API. Parse documents into text/HTML/Markdown or extract structured data with custom schemas.
+
+## Plugin Information
+
+- **Developer:** omiya0555
+- **Organization:** Fusic
+- **Version:** 0.0.1
+- **Type:** Tool Plugin
+- **Contact:** omiya@fusic.co.jp
+- **Repository:** https://github.com/omiya0555/dify-upstage-plugin
+
+## Features
+
+### 1. Document Parser
+Parse PDFs, images, and office documents into text, HTML, or Markdown format with high accuracy OCR.
+
+- Multi-format support: PDF, DOCX, XLSX, PPTX, JPEG, PNG, BMP, TIFF, HEIC
+- Multiple output formats: Markdown, HTML, Plain Text
+- Advanced OCR with chart detection
+
+### 2. Information Extract
+Extract structured data from documents using custom JSON schemas.
+
+- Custom schema definition
+- Structured JSON output
+- 90-95% accuracy on complex documents
+- Works with any document type
+
+## Setup Instructions
+
+1. Get your Upstage API key from [Upstage Console](https://console.upstage.ai/api-keys)
+2. Install the plugin in Dify
+3. Configure the API key in plugin settings
+4. **Configure File Access (Required):**
+   - For local: `FILES_URL=http://api:5001`
+   - For production: Set both `FILES_URL` and `INTERNAL_FILES_URL` to `http://localhost:5001` (adjust port as needed)
+
+## Required APIs and Credentials
+
+- **API Key:** Upstage API key (required)
+- **API Endpoint:** https://api.upstage.ai
+- **Supported Models:**
+  - Document Parse: `document-parse`
+  - Information Extract: `information-extract`
+
+## Connection Requirements
+
+- Network access to `api.upstage.ai`
+- HTTPS connection support
+- Minimum 5-minute timeout for large documents
+
+## Configuration Details
+
+### Document Parser
+- **Input:** Document file (PDF, images, office formats)
+- **Output Format:** Markdown, HTML, or Plain Text
+- **Max File Size:** Determined by Upstage API limits
+
+### Information Extract
+- **Input:** Document file + JSON schema
+- **Output:** Structured JSON data
+- **Schema Format:** Simple key-value pairs with descriptions
+
+## Privacy Policy
+
+This plugin complies with Dify Plugin Privacy Protection Guidelines. See [PRIVACY.md](../../upstage-source-code/PRIVACY.md) for full details.
+
+### Data Handling
+- Files are sent to Upstage API for processing
+- Temporary in-memory caching (max 1 hour)
+- No permanent storage of user data
+- All connections use HTTPS encryption
+
+## Performance Features
+
+- Intelligent memory cache system
+- MD5-based cache key generation
+- Automatic cache expiration (1 hour)
+- LRU eviction policy (max 100 items)
+- Thread-safe operations
+
+## Source Code
+
+Full source code is available in this repository under the `upstage-source-code` directory.
+
+## Support
+
+For issues, questions, or support:
+- **Email:** omiya@fusic.co.jp
+- **Repository:** https://github.com/Fusic-Company/dify-plugin-upstage
+
+## License
+
+This plugin is provided as-is. Please refer to the repository for license information.
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