Digitally Sign Documents with cURL

Use simple cURL commands to apply, verify & search e-signatures in various file formats with REST API. Supports variety of electronic signatures.

  • GroupDocs.Signature Cloud SDK for .NET
  • 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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cURL is a free client-side URL transfer library that allows you to handle HTTP requests and responses in dealing with the GroupDocs.Signature Cloud REST API. The API allows you to create, verify and search different type of signature objects in a number of document formats. It provides a wide variety of signature options like putting signatures on a document, verify document and search signatures in it. The API supports HTTP requests and get responses in form of JSON or XML data. Hence, any language or platform which supports the HTTP requests and responses is capable of running the API.

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

Get Started with Document Signing REST API

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 theGroupDocs.Signature Cloud REST API a try with any language - on any platform. Our e-Signing API for cloud allows you to e-sign a variety of documents with well-structured API calls.

Supported Signature Types

The API has flexible methods to add supported signatures to a number of supported document formats. For instance, the API provides methods to create Text Signature in Document Pages with different options of Text, location, alignment, font, margins, appearances and others in cURL command. Below mentioned is the simple example that shows how to retrieve supported file formats list using the cURL command.

Supported file formats list - cURL

curl -X GET "" -H "accept: application/json" -H "authorization: Bearer xxxxxx"

Cloud based e-Signing API Features

  • 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

Flexible Deployment Options

Our RESTful electronic signature API is easy to understand, clearly documented and comes with SDKs and live examples for all major languages. For developers who prefer on-premises deployment, we also offer downloadable APIs for .NET, Java, PHP and many other platforms.

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.

Cross-Platform Compatibility

Being a RESTful API, GroupDocs.Signature Cloud can be used with any language or platform which supports HTTP requests and responses. You can also use GroupDocs.Signature Cloud with many third party storage providers including Amazon S3, Google Cloud, Google Drive and DropBox.

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