---
title: "How Tos"
description: "Learn about the best practices and techniques for a secure and effective integration with the Visma Net API."
lang: en
languages:
  en: https://docs.vismasoftware.no/vismanetapi/how-tos/index.md
lastmod: 2026-03-02
---

> Documentation index: https://docs.vismasoftware.no/vismanetapi/how-tos/llms.txt


# How Tos

Last modified March 2, 2026

> Learn about the best practices and techniques for a secure and effective integration with the Visma Net API.



---

[View this page](https://docs.vismasoftware.no/vismanetapi/how-tos/)


## In this section


- [Attachment](https://docs.vismasoftware.no/vismanetapi/how-tos/attachment/index.md): How to POST an Attachment via Visma Net API in C#? Please read more about the attachment-specific endpoints at Documentation/Swagger WebClient Class public void…

- [Background API calls](https://docs.vismasoftware.no/vismanetapi/how-tos/background/index.md): How to use “background-api” calls in Visma NET

- [DateTimeCondition & Operators](https://docs.vismasoftware.no/vismanetapi/how-tos/date-time-condition-operators/index.md): Utilizing DateTime Parameters in Visma Net API Endpoints

- [Endpoints for Customer Ledger](https://docs.vismasoftware.no/vismanetapi/how-tos/customerledgerendpoint/index.md): In this article, you will find guidelines on how to use Visma Net API endpoints connected to the Customer Ledger.

- [Endpoints for Supplier Ledger](https://docs.vismasoftware.no/vismanetapi/how-tos/supplierledgerendpoint/index.md): In this article, you will find guidelines on how to use Visma Net API endpoints connected to the Supplier Ledger.

- [ETag and If-Match Headers](https://docs.vismasoftware.no/vismanetapi/how-tos/etag/index.md): Ensuring Data Consistency with ETag and If-Match HTTP Headers

- [Fix 401 Unauthorized errors despite valid token](https://docs.vismasoftware.no/vismanetapi/how-tos/fix401error/index.md): Are you getting a 401 Unauthorized error despite having a valid Access Token? Read more about how to solve this frequently asked question.

- [Pagination](https://docs.vismasoftware.no/vismanetapi/how-tos/pagination/index.md): About Paging When retrieving lists of data from API endpoints, it is most efficient for both the client and server to divide the results into portions rather…

- [SalesOrders API V3](https://docs.vismasoftware.no/vismanetapi/how-tos/salesordersv3/index.md): This article offers simple tips and best practices for the Visma Net SalesOrders API (opens in a new tab). Follow these tips to streamline tasks and improve the…