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

# Nexgo OTP

This guide details the specific steps required to prepare your NexGo terminal for API integration.

### Generating the OTP (One-Time Password)

The OTP is a temporary pairing key required to authorize the connection between the Payrexx Cash Register API and your physical terminal.

**Step 1: Access the Main Menu** Ensure the terminal is powered on and connected to the internet. Locate the hamburger menu icon **(≡)** in the top-left corner of the display and tap it to open the navigation sidebar.

**Step 2: Select Connection Mode** The side menu contains various options for transaction history and settings. Tap on the option labeled **"Connect to cash register"**.

**Step 3: Retrieve the Pairing Code** The terminal will transition to a status screen displaying an alphanumeric code (e.g., `QP3U58`).

<figure><img src="/files/QNmjA0tDBtRg4Zh2OUOW" alt="NexGo Terminal OTP Code" width="1740"><figcaption></figcaption></figure>

* **Action:** use this OTP code when sending the pairing request.
* **Note:** If you navigate away from this screen before pairing is complete, the code will change.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.payrexx.com/developer/ecr-information/nexgo-pariring.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.