eSignR REST-API interface:
Integrate the electronic signature into your solution

Easily integrate the electronic signature into all your tools or directly into your application. Thanks to the eSignR REST API, users continue to work seamlessly in their familiar environment.

Unique with us

  • Implement legally valid electronic signatures and certificates*
  • Compatibility on-premise & cloud
  • Signature solution for the highest security requirements
  • Uses the signature services of Swisscom Trust Services
  • Swiss support from our competent team


If you do not host the eSignR backend on our servers, you as the operator must submit an application to the FOJ for electronic notarisation (211.435.1 FNSO Ordinance 7th Section: Authorisations).

API elektronische Signatur

The advantages of electronic signature API integration in your software

Optimisation of digital processes

Integrating the signature process into your software increases the efficiency of your workflows and offers your users an optimised user experience through direct integration into applications and websites.

API interface for on-premise and cloud

Using our API, you can flexibly integrate both on-premises and cloud services.

Acceleration of business transactions

The integration of digital signatures enables all documents to be signed directly from your tools, reduces the risk of incomplete contracts and speeds up the entire closing process.

Time and cost savings

The integration of electronic signatures not only reduces paper consumption, printing costs and manual administrative processes, but also the processing time of documents.

Integration into existing software

With our API, the signature process can be seamlessly integrated into existing software solutions, be it CRM systems, document management platforms or other internal applications.

Integration of the electronic signature in various software applications via API

These are just a few conceivable examples of how eSignR can be used, but the electronic signature can be integrated into many applications.

  • Customer Relationship Management (CRM)
  • Document management systems (DMS)
  • Enterprise Resource Planning (ERP)
  • Financial software
  • Personnel management software (HR)
  • Applications for electronic forms
  • Notary software (more information for notaries)
  • Construction and engineering software
  • Healthcare software
  • Project management tools
  • Contract management software
  • Insurance software
  • Education systems and learning platforms
  • E-commerce platforms
  • Telecommunications software
  • Event management software
  • Lawyer software (more info for lawyers)
  • Quality management software
  • Logistics and supply chain management software
  • IT service management (ITSM) platforms
  • Property management software
  • Fleet management software
  • Compliance management tools
  • Project collaboration platforms

Find out more about the on-premise solutions from eSignR

The prerequisite for using the eSignR REST API is the use of the on-premise version of eSignR. This means that companies operate eSignR in their own hosting environment.

With eSignR you can utilise further exciting options

Headless-Batch Modus für Massensignaturen

Read the Headless Batch Mode guide to learn how to sign hundreds of documents simultaneously in one go without having to use the user interface.

Command line interface (CLI)

It is possible to start eSignR for the signature process via a command line. Contact us to find out more about our CLI support.

UPReg integration for notary’s offices

A UPReg integration is available for Swiss notaries, which allows them to sign digitally and simultaneously create notarised deeds in accordance with the EÖBV.

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free of charge for one month.