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E-Sign Electronic Signature API

Integrate E-Sign’s e-signature software into your website for a powerful digital experience. E-Sign understands the needs of both developers and businesses. We offer E-Sign's electronic signature API to integrate online document signing into your web applications or business process. Automate signature requests, embed E-Sign documents in your website, and much more.

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What is API?

Application Programming Interface, or API, is a software intermediary that allows multiple applications to communicate with each other. An API connects your business processes, services, content, and data to channel partners, internal teams, and independent developers in an easy and secure way.

APIs are quickly becoming the de facto standard by which companies exchange data and build consistent cross-channel customer experiences. Make sure your business stays ahead of the curve with E-Sign’s API technology.

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Why Use API?

An API provides customers with an assortment of well-integrated features, providing greater flexibility and convenience that’s ideal when requesting digital signatures.

APIs integrate a number of different application functions into one big software program, making these applications more accessible and user-friendly for you and your customers.

API provide an integrated software solution

Secure API with Simplified Management

When you choose an API service from E-Sign, you can be sure that your API is secure and compliant.

Our E-Sign platform and electronic signatures are compliant with all major e-Signature laws and operate an encrypted client library for end-to-end encryption to protect the contents of your documents and your sensitive data.

API simplifies management

The Only Trusted Digital Signature Provider on the Public Service Network

E-Sign is the only electronic signature provider trusted on the Public Service Network. The PSN is the UK Government’s high-performance network, which enables public sector organisations to work together, reduce duplication and share resources.

Government organisations and health trusts access the PSN for secure and trusted digital services, that meet strict regulatory requirements and provide assurance that the service they access has the highest security standards, is exceptionally reliable, and can address issues within a rapid timeframe.

With the rapidly growing digitisation of document management and cloud-based solutions, the need for trustworthy providers has never been more important. The E-Sign document management and electronic signature solution provides businesses with improved efficiencies and major cost savings, creating enhanced advantages over competitors.

View the PSN Approved List

Business Benefits

Greater Automation

By using an API, you have the ability to integrate greater automation into your processes for a smoother, more efficient digital experience.

Integrated Applications

With an API, you can effortlessly integrate numerous applications into one, simplified software.

Smooth Customer Experience

By integrating your applications, you can equip your customers with a user-friendly and joined up website experience.

Eliminate Barriers to Your Business

Remove any barriers between your customers and business with an integrated API and encourage greater traffic through flexible and convenient functionality.

Secure API

With the E-Sign platform, you can be sure all your data and communications are secure and compliant.

Build on Existing Systems

Using E-Sign’s API, you can create an integrated process on existing or new applications to innovate your current processes.

Technical Checklist

  • Automate business processes with webhooks.
  • Ensure a smooth digital experience for your customers.
  • Build on existing or new applications.
  • Remove barriers between you and your customer base.
  • Encourage user engagement with flexible and friendly processes.
  • Integrate your applications for a single, unified software.

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Why use E-Sign?


E-Sign allows staff to work their core job more productively, utilising streamlined secure document processes.

Cost Effective

Spend less time on administration and traditional paper-based expenses. Save on mail and associated expenditure.


With instantaneous delivery and rapid, secure authentication, there’s no need to wait days for document turnaround with E-Sign.

Trusted by

Trusted By Aunt Bessies Brand Trusted By DHL Brand Trusted By Multivac Brand Trusted By Nandos Brand Trusted By NFU Mutual Brand Trusted By TY Brand Trusted By The University of Chichester Trusted By UK Fuels Trusted By Virgin Brand Trusted By Emporio Armani Brand Trusted By Foxpak Brand Trusted By NHS Brand