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SignatureAPI: Electronic Signature API

SignatureAPI helps developers and operations managers embed e-signature capabilities into their software. It is designed for businesses that need to automate document signing through a pay-per-transaction model.

Pricing

SignatureAPI uses a paid model starting at $0.25 per document transaction.

At a glance

Best for
Developers, SaaS platform owners, Operations managers, Businesses with high-volume signing needs
Key use cases
SaaS Feature Integration, Automated Document Workflows, Multi-party Agreement Routing, Regulated Document Collection
Integrations
Power Automate, Zapier
Visit signatureapisignatureapi software interface screenshot

How AI is used

SignatureAPI is a technical solution for businesses that want to collect electronic signatures within their own applications. It provides a REST API for developers and no-code connectors for automation platforms, which supports a customized signing experience.

The tool is designed for SaaS platforms and companies with document needs. It supports signing workflows, including routing documents to multiple people in a specific order and bundling up to 10 documents into one envelope.

Beyond the API, the service includes a dashboard for tracking signing activity and an AI Toolkit for agents to handle document tracking. The signatures are designed to be legally binding under regulations such as the ESIGN Act and eIDAS.

Buyers should confirm if their specific compliance needs—such as HIPAA or SOC 2—are met by the available configuration options, as some security settings require manual setup or specific requests to support.

Key Features

  • REST API

    Allows developers to programmatically define electronic signature workflows.

  • No-code Connectors

    Supports integration with platforms like Power Automate and Zapier to automate signing tasks.

  • Embedded Signing UI

    Provides a signing interface that can be integrated into web or React Native apps.

  • Dynamic Document Templates

    Supports creating .docx templates with placeholders that are populated with dynamic data.

  • Parallel and Sequential Routing

    Supports sending documents to up to 10 signers either all at once or in a predefined order.

  • Accountless Signing

    Enables recipients to sign documents without creating or logging into an account.

  • Real time Webhooks

    Provides notifications when envelopes are signed, completed, or canceled.

  • AI Toolkit

    Designed to enable AI agents to send and track signed documents.

Use Cases

  • SaaS Feature Integration

    Integrating electronic signatures directly into a software platform's user interface.

  • Automated Document Workflows

    Using no-code connectors to send contracts or waivers automatically when triggered by other apps.

  • Multi-party Agreement Routing

    Managing documents that require signatures from multiple stakeholders in a specific sequence.

  • Regulated Document Collection

    Collecting signatures for healthcare or legal documents that support SOC 2 or HIPAA-compliant handling.

Integrations

  • Power Automate
  • Zapier

FAQ

How much does SignatureAPI cost?

Pricing is based on a pay-per-transaction model, starting at $0.25 per document.

Do recipients need an account to sign documents?

No, the platform supports accountless signing, allowing recipients to sign without creating a login.

Is SignatureAPI HIPAA compliant?

Yes, it supports HIPAA compliance, but it requires contacting support to request HIPAA mode and a Business Associate Agreement (BAA).

Can I automate SignatureAPI without writing code?

Yes, SignatureAPI provides no-code connectors for Power Automate and Zapier to help build signing workflows.

Source category: Operations

Source subcategory: Electronic Signature

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