API features that developers love

HelloSign's developer-friendly API is the fastest to implement and fits seamlessly into your document workflow*

*Source: G2 - Fastest Implementation in 2020
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Available Plans

Essentials

 Basic API Needs
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Standard

 Business API Needs
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Premium

 Advanced API Needs
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Core Features

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Templates
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Streamline documents that need to be reused and sent out for eSignature frequently.
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Essentials
15
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Unlimited
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API technical email support
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Access to HelloSign technical support engineers to assist all of your API inquiries.
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Essentials
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Audit trail
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Audit trails are associated with transactions to ensure actions are tracked and time-stamped.
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Email support
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All HelloSign customers get email access to our caring and knowledgeable support team.
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Mobile friendly signing
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Get documents signed from anywhere around the world, on any mobile device.
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Multiple languages
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Both senders and signers can use HelloSign in 22 different languages.
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Signature types
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Add legally binding eSignatures to your documents by typing, drawing, or uploading.
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Signer fields
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Drag-and-drop signature blocks, text fields, checkboxes, dates, and more onto your documents.
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Security and Trust

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256-bit AES and TLS encryption
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All documents are stored and encrypted at rest using AES 256-bit encryption.
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Essentials
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Data validation
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Validate signer fields in real-time based on criteria that you determine.
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Tamper-proof documents
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Allows users to tamper-proof individual documents within a signature request.
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Advanced SMS authentication
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Request enhanced recipient authentication using SMS (includes 10 SMS auth per user / per month).
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Signer access codes
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Send a one-time verification code to your signer's mobile phone for added security.
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Bulk delete
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Delete your team's completed documents in bulk one-off or on a regular basis.
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Data residency
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Allows companies to store completed documents in one of our global data residency options.
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Masked fields
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Easily mask (hide) fields so you can capture sensitive information without compromising privacy.
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Development

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API dashboard
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View the status of API requests and inspect your callbacks for easy troubleshooting.
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API documentation
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Clean and easy-to-navigate documentation written by developers for developers.
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API test mode
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Developers can build out and test their end-to-end eSignature workflow in test mode for free.
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SDKs in 6 languages
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HelloSign provides official SDKs for Python, Ruby, PHP, Java, NodeJS, and C#.
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OAuth
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HelloSign leverages OAuth 2.0 authentication to secure our endpoints and user data.
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Multiple domains
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Allows you to send out signature requests from multiple domains under one account.
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Workflow

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Decline to Sign
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Gives signers the option to decline the signature request and provide a reason why.
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Template links
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Convert templates into URLs that can be shared on your website or via email.
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Embedded requesting
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Embed the document preparation process within an iFrame on your website.
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Embedded signing
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Embed HelloSign into your website and provide signers with an in-app signing experience.
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Redirect after signing
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Redirect your signers to a website of your choice after they have finished signing.
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Conditional logic
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Add logic to your documents so your signers enjoy a faster, more intuitive signing experience.
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Embedded templates
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Allows you to embed template creation and management within an iFrame on your website.
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Customization

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Auto-populated fields
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Allows senders to pre-populate known information into the signature request.
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Signer groups
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Great for documents where multiple people can sign, first person signs completes the request.
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Branding
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Keep your signature requests on brand by adding your company logo and custom messaging.
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Bulk send
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Send out individual signature requests to a large list of recipients with a single click.
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Signer attachments
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Seamlessly collect file attachments from your signers as part of the signature request.
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App-level branding
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Create a more personalized signing experience by customizing the logo for each application.
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Advanced signer fields
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Create an intuitive signing experience with, drop-downs, radio buttons, clickable links, and more.
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Advanced signing tools
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Includes features like Signer Reassignment and Variable Signers.
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White labeling
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Customize branding and remove any mention of HelloSign for a seamless signing experience.
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Certifications

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eIDAS
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HelloSign is eIDAS compliant.
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GDPR
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HelloSign is compliant with European "General Data Protection Regulation" (GDPR).
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ISO 27001
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HelloSign is ISO 27001 Certified and is proactive towards information security threats.
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SOC 2 Type II
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HelloSign is SOC 2 Type II compliant.
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U.S. ESIGN Act of 2000
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HelloSign eSignatures are legally binding under the 2000 U.S. ESIGN Act.
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HIPAA
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HelloSign can support HIPAA compliance with a signed BAA (minimum contract value required).
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QES
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Meet the most secure form of eSignatures under eIDAS with Qualified Electronic Signatures (QES) from HelloSign.
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Premium*
*Additional cost add-on, contact sales for details.

View our API documentation and start building today for free

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