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Integrate Electronic Signatures

The modern way to collect e-signatures in your apps and workflows, at any scale.

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API

Integrate electronic signatures into my app or platform

API Docs

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NO-CODE

Automate sending and tracking documents for signature

Power Automate

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AI TOOLKIT

Enable your AI agent to send and track signed documents

AI Toolkit

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Best in class

experience

Our clean, minimal signing interface keeps your signers focused on the task .

Make it easy to your signers to sign using our minimal signing interface, designed to make the signers focused to the task at.

 built for developers

Reliable, intuitive API that let you define your entire electronic signature workflow programatically, giving you maximum flexibility to fit any use case.

API Docs  Build with AI

POST

https://api.signatureapi.com/v1/envelopes

Content-Type: application/json
X-API-Key: test_key_ae18de8…

  "title": "NDA Agreement",
  "topics": [ "human_resources" ],
  "routing": "sequential",
  "sender": 
    "name": "John Doe",
    "email": "john@example.com"
  ,
  "documents": [
    
      "url": "https://bucket.s3.com/123456.docx",
      "format": "docx",
      "data": 
        "unit": "100B",
        "tenant": "Jane Smith"
      
    
  ],
  "recipients": [
    
      "type": "signer",
      "key": "tenant",
      "name": "John Doe",
      "email": "john@example.com"
    ,
    
      "type": "signer",
      "key": "landlord",
      "name": "Mr Landlorf",
      "email": "land@example.com"
    
  ]

No Code? No Problem.

Integrate to thousands of apps
with our no-code and low-code connectors

Integrate to thousands of apps with our no-code and low-code connectors

Power Automate Zapier

 TEMPLATES

Document Templates

Start with a .docx file, add placeholders, and populate it with dynamic data to generate documents ready for signing.

Documentation

 SIGNED DOCUMENTS

Signed, Sealed, Delivered

The final file contains the signed documents and an audit log that tracks who accessed the file and what actions they took. It’s cryptographically sealed to ensure tamper-proof, verifiable integrity.

See example

 CUSTOMIZATION

Your Branding

Customize the look and feel of signing ceremonies and recipient emails with your logo and brand colors — keeping your identity front and center.

Learn more

Track Every Signature

We provide a full-featured dashboard for you and your team to track signing activity, designed to handle high volumes of transactions.

Dashboard Docs

Features to build on

Changelog

Multiple recipients

Send to up to 10 signers in a single electronic signature transaction.

Parallel or Sequential Signing

Send to all recipients at once or one by one in your preferred order.

Bundle Documents

Combine up to 10 documents into a single envelope.

Languages & Localization

Customize languages, date-time formats, and time zones in the signing interface and audit logs.

Accountless Signing

Recipients can sign documents without needing to create or log into an account.

Real-Time Notifications

Receive immediate updates on signing activities via emails and webhooks.

Legally‑binding signatures worldwide

Our electronic signatures are globally recognized and legally binding, in most countries offering the same legal standing as traditional ink signatures on paper.

ESIGN Act

The Electronic Signatures in Global and National Commerce (ESIGN) Act, passed in 2000, legally recognizes electronic signatures and records in US commerce.

UETA

The Uniform Electronic Transactions Act (UETA) aims to provide uniformity and consistency across states in the US by standardizing the legal treatment of electronic records and signatures.

eIDAS

The Electronic Identification and Trust Services (eIDAS) Regulation, effective since 2016, standardizes and legally recognizes electronic signatures across the European Union. Our signatures are classified as eIDAS SES.

International

Several international regulations recognize the legality of electronic signatures, ensuring their validity and enforceability in many jurisdictions around the globe.

⊙ for legal professionals

Electronic Signature News

Latest global legal news on e-signatures, digital contracts,
and compliance. Curated by SignatureAPI.

An e-signature API that just works

“We needed a scalable solution for handling digital signatures in our SaaS platform, and SignatureAPI delivered. Their support is responsive, the documentation is solid, and integration was smooth. It’s been a great tool for both small features and larger workflows.”

Scott Terrell

Founder & CEO, Solvrix

“Lien waivers used to be the choke‑point in our disbursement process—we were always chasing signatures and re‑entering data. SignatureAPI dropped straight into our stack and now waivers go out, get signed, and come back automatically in minutes. It’s shaved hours off every draw and keeps our projects moving.”

Cameron Strong

Co-Founder, Findlan

“SignatureAPI took the hassle out of sending insurance claims for signature. It’s fast, simple, and backed by solid support. It just works.”

Gabriel Pulido

California Fair Claims

 START FOR FREE

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