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Make eSignature your own

The most feature complete eSignature API available. Legalesign is API-first by design. Anything you can do within Legalesign Web App, you can do via the API.

Reliable

The API has processed millions of documents and runs on high-scale, high reliability systems. ISO27001 and Cyber Essentials Plus Certified.

REST or GraphQL

The easy to use and proven REST API delivers a powerful set of easy to use functions.GraphQL provides a deep feature complete interface to everything Legalesign can do.

Embeddable

Use the API to frame the PDF edit page and the signing pages to make a truly integrated experience.

What is the API?

Legalesign API (application programming interface) comprises products that enable programmatic access to the features of the Legalesign Platform. The API comprises a REST API, GraphqQL API, SDK, Realtime Webhooks, and Embedding, and UI Library.

What can you do with the API?

Anything you can do within the Legalesign Web App, you can also do via the API. The Legalesign API provides the functionality to either add eSignature to your own software for your end-customers, or to automate in-house processes:

You can:

  • Send a PDF to be signed, witnessed, or approved by up to 99 recipients.

  • Upload a PDF and add form fields using either text markers or x/y coordinates.

  • Embed the form editor in an iframe.

  • Re-use a PDF and customise it upon sending.

  • Get a preview of your custom PDF before sending.

  • Extract the signing link and either embed the signing pages on your website or suppress Legalesign emails and use custom communication channels for signers.

  • Use your own domain for embedded signing pages.

  • Use HTML documents instead of PDF (PDF is recommended however).

  • Get all events reported back to a URL of your choice in real time with webhooks.

  • Add groups and users programmatically to model multiple discrete end-customer data environments (and optionally provide a Legalesign app to those users too).

  • Integrate with no-code solutions like MS Power Automate.

How does API work?

The Legalesign API has several integration options to suit different applications.

Using a secure REST API your systems can communicate with Legalesign and trigger a host of functionality.

  • Website integration - provide a signing page within your own website.

  • Integrate into the Microsoft software suite via PowerAutomate.

  • Software integration - Create a seamless signing experience.

API Customer Stories

Read more Customer Stories
Testimonial

Ready Project

"Using the Legalesign API is a breeze, sending and processing e-signed documents couldn't be easier"

James

Director of Information Systems

Testimonial

NHS CCG

"We finally found a product which offered all the features we wanted and the flexibility we needed at a realistic price. Legalesign was immediately easy to use and the development team provided exceptional levels of support. As a result, we were able to implement our full solution for generating and managing complex multi-party contracts very quickly and keep several business-critical projects on track. Feedback from end-users has been very positive... provides absolute clarity and assurance throughout the process. The ease with which we can now make updates to key legal documents means that this is no longer a bottleneck in our development process."

Carl D

Testimonial

G2 Review

"I've integrated Legalesign into a CMS product. The use case was for users to have to sign an NDA before gaining full access to the system. I managed to do this with ease using the Legalesign REST API such that the entire process of user sign-up, NDA signing and granting full access to the system is entirely automated. Their support team are knowledgable on development related issues and are very responsive. I also trialled Adobe EchoSign... and without a doubt, Legalesign most definitely represent the best solution when it comes to features, flexibility and robustness versus pricing."

G2 Logo

Developer

Testimonial

N4Gtv.com

"I am definitely planning on using the Legalesign e-Signature API again soon. I appreciated the support and attention to security."

Arthur King

Head of IT

Testimonial

Cloudbase

"Integrating Legalesign via its API into a customers solution worked flawlessly."

Trevor Gildesleeve

Owner

Ready to Start your Integration?

To start developing or using a Legalesign Plugin, you'll first need to get verified for API access to generate a key. Get in touch and we can help you through the process.

Key Features

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FAQ

Frequently asked questions about eSignature API and Legalesign.


Have a question that is not answered here? Contact us and our award winning Support Team will be in touch.