> For the complete documentation index, see [llms.txt](https://docs.viesus.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.viesus.com/reference.md).

# Reference

- [CLI Reference](https://docs.viesus.com/reference/cli-reference.md): Complete reference for the VIESUS image enhancement CLI — flags, input methods, output naming, image list format, and usage examples.
- [PDF CLI](https://docs.viesus.com/reference/pdf-cli.md): VIESUS PDF Enhancer (viesusPDF) reference — operating modes, all flags, processing workflow, and usage examples.
- [Node.js Module](https://docs.viesus.com/reference/node.js-module.md): VIESUS Node.js native module reference — installation, API, Docker, and performance tuning for in-process image enhancement.
- [Overview](https://docs.viesus.com/reference/node.js-module/overview.md): The VIESUS Node.js native module integrates the VIESUS image enhancement engine into Node.js environments on Linux. Overview, architecture, and requirements.
- [Getting Started](https://docs.viesus.com/reference/node.js-module/getting-started.md): A walkthrough of the worker.js and testbatch.js pattern for the VIESUS Node.js module — worker thread pool, batch processing, and GPU scaling.
- [API Reference](https://docs.viesus.com/reference/node.js-module/api-reference.md): Complete API reference for the VIESUS Node.js native module — MyViesusObject constructor, Enhance method, error codes, and result JSON.
- [Docker](https://docs.viesus.com/reference/docker.md): Run VIESUS in GPU-enabled Docker containers — guides for the CLI and the Node.js module.
- [Docker for CLI](https://docs.viesus.com/reference/docker/cli.md): Step-by-step guide to running the VIESUS CLI in a GPU-enabled Ubuntu Docker container with NVIDIA GPU support.
- [Docker for Node.js](https://docs.viesus.com/reference/docker/nodejs.md): Run the VIESUS Node.js module in a GPU-enabled Docker container. Dockerfile, build, and run instructions for Linux production deployments.
- [Cloud API](https://docs.viesus.com/reference/cloud-api.md): VIESUS Cloud GraphQL API reference — authentication, uploading, image and PDF enhancement, credits, and webhooks.
- [Overview](https://docs.viesus.com/reference/cloud-api/overview.md): VIESUS Cloud is a managed GraphQL API for image and PDF enhancement. No infrastructure required — upload, enhance, retrieve.
- [Authentication](https://docs.viesus.com/reference/cloud-api/authentication.md): Authenticate VIESUS Cloud API requests using the x-api-key header. Creating and managing API keys.
- [Uploading](https://docs.viesus.com/reference/cloud-api/uploading.md): Upload images and PDFs to VIESUS Cloud via URL or signed upload URL. Response fields, retention, and deletion.
- [Enhance Images](https://docs.viesus.com/reference/cloud-api/image-enhancement.md): Trigger image enhancements with createEnhancedImage. Parameters, status, AI upscaling limits, and polling vs webhooks.
- [Enhance PDFs](https://docs.viesus.com/reference/cloud-api/pdf-enhancement.md): Enhance PDFs via VIESUS Cloud. Analysis phase, enhancement parameters, DPI limits by subscription tier, and webhook events.
- [Credits](https://docs.viesus.com/reference/cloud-api/credits.md): VIESUS Cloud credit model — per-image pricing, PDF formulas, subscription DPI limits, and upload retention.
- [Webhooks](https://docs.viesus.com/reference/cloud-api/webhooks.md): Receive real-time enhancement notifications via VIESUS Cloud webhooks. Setup, signature verification, retry behavior, and delivery logs.
- [C/C++ SDK](https://docs.viesus.com/reference/overview.md): Integrate the VIESUS enhancement engine directly into C/C++ applications via the IsEnhance.h native API. When to use the SDK, platform support, and how to get access.


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