C# .NET Cloud SDK to eSign Documents

C# Cloud SDK & REST API to electronically secure documents by applying text, stamp, QR-code, barcode, image and digital signatures.

  • GroupDocs.Signature Cloud for cURL
  • GroupDocs.Signature Cloud SDK for Java
  • GroupDocs.Signature Cloud SDK for PHP
  • GroupDocs.Signature Cloud SDK for Python
  • GroupDocs.Signature Cloud SDK for Ruby
  • GroupDocs.Signature Cloud SDK for Node.js
  • GroupDocs.Signature Cloud SDK for Android
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GroupDocs.Signature Cloud SDK for .NET is a .NET SDK for communicating with the GroupDocs.Signature Cloud API, which lets you create, verify and search different types of signature objects in a number of document formats. The API is highly scalable, easily customizable and helps the developers to utilize all the features of the API in an efficient and easier way.

How to Sign a document using GroupDocs.Signature Cloud SDK for .NET

  • Create an instance of Configuration using available Client Id and Client Secret.
  • Create an instance of SignApi using instance of Configuration.
  • Create an instance of SignDigitalOptions and set options for signatures.
  • Create an instance of FileInfo and set path to input file.
  • Create an instance of SignSettings with instances of SignDigitalOptions and FileInfo.
  • Use SignApi.CreateSignatures to digitally sign your document.

Frequently Asked Questions

I want to create my own .NET application that can parse files online?

Check our Cloud SDKs for .NET at GitHub if you are looking for the source code to parse files in the Cloud.

Can I try GroupDocs.Signature REST APIs on .NET for free?

You can try GroupDocs.Signature Low-Code .NET APIs without any limitations.

I do not want to upload my confidential files anywhere? What are my options?

GroupDocs.Signature Cloud is also available as Docker image which can be used to self-host the service. Or you may build your own services using GroupDocs.Signature High-code APIs which currently drive both our Free Apps and REST APIs.

Advanced Document Signature REST API Features

Provide the list of supported document formats

Retrieve document pages information

Retrieve document properties

Verify Text and Digital signatures

Verify Barcode and QR-Code signatures

Cross-Platform Compatibility

Search multiple signatures

Add multiple signatures

Get it Working Really Fast

It is easy to get started with GroupDocs.Signature Cloud as there is nothing to install. Simply create an account at GroupDocs Cloud and get your application information. Once you have the App SID & key, you are ready to give the GroupDocs.Signature Cloud REST API a try with any language - on any platform. To help the developers to speed up the development of their projects, we have built SDK for .NET, which helps them to integrate the e-signing REST API in their .NET apps without worrying about the low-level details of handling the HTTP requests and responses.

Supported Signature Types

Our e-Signature RESTful API supports the following signature types:

  • Text Signature
  • Image Signature
  • Barcode Signature
  • QR-Code Signature
  • Digital Signature
  • Stamp Signature

Cloud based e-Signing API Features

GroupDocs.Signature Cloud REST APIs allow the following operations with documents:

  • Provide list of supported document formats
  • Obtain list of supported Barcode and QR-Code encode type names
  • Retrieve document properties like document size, creation and update dates, count of pages etc
  • Retrieve document pages information like pages count etc
  • Support signature for PDF documents
  • Support signature on Microsoft Documents formats like MSWord Documents, Excel Spreadsheets, PowerPoint Presentations
  • Support signature for Open Document Formats, HTML and many more
  • Verify documents for signatures

Extensive File Type Support

GroupDocs.Signature allows end users to sign documents literally in all common business formats, including PDF, Microsoft Word, Excel, PowerPoint, Rich Text format etc.

A Flexible SDK for Specific Needs

GroupDocs.Signature Cloud SDK is 100% tested and out of the box running. The SDK is open source and has an MIT license. It is highly flexible, so you can use it, and even customize it to suit your needs for absolutely free of charge.

GroupDocs.Signature Cloud also offers individual SDKs for other popular languages as listed below: