--- title: "REST API SERVER | Introduction | N3uron KB V1.22" slug: "rest-api-server-introduction" description: "REST API SERVER is a N3uron module designed to be used for exposing resources. REST calls can be used to retrieve datainformation or send control…" updated: 2026-11-07T08:55:59Z published: 2026-11-07T08:55:59Z canonical: "docs.n3uron.com/rest-api-server-introduction" --- > ## Documentation Index > Fetch the complete documentation index at: https://docs.n3uron.com/llms.txt > Use this file to discover all available pages before exploring further. # Introduction **N3uron ’s** [**REST API Server**](https://n3uron.com/iiot-platform-modules/rest-api-server/) module is a component of the IIoT & DataOps platform that enables seamless access to the node, facilitating data retrieval and command transmission via REST calls. With this interface, users effortlessly can navigate Data Models programmatically. The API Server acts as an API gateway for industrial data residing in OT systems by offering a streamlined abstraction layer over diverse protocols—OPC UA, MQTT, Sparkplug, Modbus, DNP3, DLMS, IEC 102, IEC 104, etc.—eliminating the need for domain expertise in underlying systems. Any application or service with an HTTP client can securely request OT data in raw or modeled form directly from N3uron The main features of **N3uron****’s** **REST API Server** are: - User authentication based on user/password or access token. - High performance to support unlimited remote clients and connections. - Secure HTTPS connections. - Data encryption using self-signed or CA signed certificates. - Compatible with Automated Certificate Management systems. - Permits to **read and write** **real-time** values of tags. - Permits to **retrieve and acknowledge alarms.** - Permits to retrieve **raw and aggregated** **historical data** of several tags in the same request. - Permits to retrieve and control the status of the system, modules, licenses, links and backups. - Permits to change the configuration without having to access the WebUI. - Complete control over the access and permissions of each user. The REST server uses by default port 3003 for **HTTP** requests and port 3443 for **HTTPS** requests, both ports are configurable. To create a REST request, a URL is built containing the IP address, service HTTP or HTTPS port, and all other information the server needs in order to complete the desired task. Data is returned in JSON format. Note: The [**Appendix**](/v122/docs/rest-api-server-appendix) section contains a Postman collection that will make it much easier for the user to get started with the **REST API Server** module ## ![n3uron-chatgpt-assistant](https://cdn.document360.io/54093ab5-6b22-4542-a265-04377931f11a/Images/Documentation/n3uron-chatgpt-assistant.png)**N3uron Skills for AI Agents** > [!TIP] > The [N3uron Skills for AI Agents](https://portal.document360.io/v122/docs/agent-skills) equip **AI agents** with **structured knowledge of the N3uron platform**, helping users accelerate tag model creation, template development, integration setup, and large-scale deployment workflows. > > They can design tag hierarchies, define tag properties, build reusable templates with custom properties, inheritance, and nesting, and generate template definitions or import-ready CSV files from register maps, datasheets, Excel files, PDFs, images, exported tag lists, and other technical sources. > > They also support advanced N3uron use cases, including SQL Client scripting, MQTT custom payloads and parser scripting, REST API Client and REST API Server setup, Scripting workflows, Derived Tags logic, Historian setup, WebVision-related structures, MCP Server configuration, and other industrial communication scenarios. > > For troubleshooting and industrial analysis, they can work with logs, historical data, alarm records, module status, tag metadata, outputs from connected systems, and information exposed through the N3uron MCP Server. > > These Skills can be used in compatible AI environments such as ChatGPT, Codex, Claude Desktop, Claude Code, Antigravity, MCPJam Inspector, and other agent-based platforms that support custom skills. > > To get started, [**download the N3uron Skills for AI Agents**](/v122/docs/agent-skills#download-from-this-link) and follow the corresponding Knowledge Base guide for your environment: > > [ChatGPT](/v122/docs/agent-skills#upload-the-skill-file-to-claude-desktop1) | [Codex](/v122/docs/agent-skills#install-manually-from-the-skill-file-in) | [Claude Desktop](/v122/docs/agent-skills#download-skill-file-from-this-link) | [Claude Code](/v122/docs/agent-skills#upload-the-skill-file-to-claude-desktop) | [Antigravity](/v122/docs/agent-skills#install-manually-from-the-skill-file-in-codex) | [MCPJam Inspector](/v122/docs/agent-skills#upload-the-skill-file-to-chatgpt) [![n3uron-chatgpt-assistant](https://cdn.document360.io/54093ab5-6b22-4542-a265-04377931f11a/Images/Documentation/n3uron-chatgpt-assistant.png)](https://chatgpt.com/g/g-693480152e40819182884223d02f3e61-n3uron-rest-api-assistant) [**N3uron REST API Assistant**](https://chatgpt.com/g/g-693480152e40819182884223d02f3e61-n3uron-rest-api-assistant) The **N3uron REST API** **Assistant** is a specialized **AI tool** **available in the ChatGPT Store**, built to accelerate integration, automation, and configuration tasks using **N3uron’s REST API Server**. It provides production-ready guidance for working with N3uron programmatically. - Build REST integrations and automations with **N3uron’s REST API** (real-time + historical data, alarms, system, certificates, configuration, backups, and more). - Get ready-to-use code examples (curl/Postman/Node.js/Python) and request/response patterns. - Receive configuration guidance. - Follow best practices for troubleshooting and handling common API errors. [Embedded content](https://www.youtube.com/embed/sSA3MCQx9GE?&wmode=opaque&rel=0) [Embedded content](https://www.youtube.com/embed/ElA34mLNRlI?&wmode=opaque&rel=0)