XactoSign is the enterprise-grade digital signature platform built for developers. Seamlessly integrate legally binding e-signatures into your workflow with our powerful REST API.
Everything you need to implement secure, compliant digital signatures in minutes, not months.
RESTful API designed for developers. Simple endpoints, comprehensive documentation, and SDKs for every major language. Integrate signatures into your application in under 10 minutes.
AES-256 encryption at rest, TLS 1.3 in transit, and zero-knowledge architecture. Your documents are encrypted end-to-end and never stored unencrypted on our servers.
Full compliance with ESIGN, UETA, and eIDAS regulations. Every signature includes tamper-evident seals, audit trails, and cryptographic proof of authenticity.
Sub-100ms API response times with 99.99% uptime SLA. Built on redundant infrastructure across multiple regions for maximum performance and reliability.
Responsive signing experience that works flawlessly on any device. Touch-optimized signature capture, biometric authentication, and offline mode support.
Advanced routing, sequential signing, parallel approvals, and conditional logic. Webhooks keep your systems in sync with real-time status updates.
Real-time dashboards, completion tracking, and detailed audit logs. Export compliance reports and monitor document status across your organization.
Support for international signature standards including eIDAS (EU), ZertES (Switzerland), and local regulations in 180+ countries worldwide.
Fully customizable branding, email templates, and signing interface. Embed seamlessly into your application with your logo, colors, and domain.
We take security seriously so you can focus on building great products.
All documents are encrypted using military-grade AES-256 encryption before storage. Encryption keys are managed through AWS KMS with automatic rotation and hardware security modules (HSM).
All API communications use TLS 1.3 with perfect forward secrecy. We enforce HTTPS-only connections and support modern cipher suites with HSTS preloading.
Support for TOTP, SMS, email, and biometric MFA. OAuth 2.0 and SAML 2.0 integration for enterprise single sign-on (SSO) with providers like Okta, Auth0, and Azure AD.
Built on enterprise-grade cloud infrastructure with annual penetration testing and continuous security monitoring by third-party experts.
Full compliance with global privacy regulations. Data residency options in US, EU, and Asia-Pacific regions. Right to erasure, data portability, and transparent data processing.
Optional cryptographic timestamping and blockchain anchoring for immutable proof of signature time and document integrity. SHA-256 hashing ensures tamper detection.
Granular access control with custom roles and permissions. API key scoping, IP whitelisting, and rate limiting to prevent unauthorized access and abuse.
Comprehensive logging of every action: document views, signature events, IP addresses, timestamps, and user agents. Immutable audit logs with cryptographic verification.
Automated daily backups with 30-day retention across geographically distributed data centers. Point-in-time recovery and disaster recovery procedures tested quarterly.
Real-time intrusion detection, DDoS protection, and anomaly detection powered by machine learning. Security operations center (SOC) with instant incident response.
Multi-step signer authentication including email verification, SMS OTP, knowledge-based authentication (KBA), and government ID verification for high-value transactions.
Client-side encryption options where we never have access to your unencrypted documents. You control the keys, we provide the infrastructure and compliance framework.
Simple, powerful, and built for scale. Get started in minutes with our intuitive REST API.
# Create and send a signature request curl -X POST https://api.xactosign.com/v1/signatures \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "document": { "file_url": "https://example.com/contract.pdf", "title": "Service Agreement" }, "signers": [ { "name": "Jane Doe", "email": "jane@company.com", "role": "client" } ], "settings": { "expires_in_days": 30, "reminder_enabled": true } }' # Response { "id": "sig_7h3kj2h4k5j6h7k8", "status": "sent", "created_at": "2025-10-26T14:32:15Z", "signing_url": "https://sign.xactosign.com/..." }
XactoSign signatures are legally binding in 180+ countries and fully compliant with international regulations.
US Federal Law
Uniform Electronic Transactions Act
European Union Regulation
Data Privacy Compliance
Legal Validity: XactoSign implements advanced electronic signature (AES) and qualified electronic signature (QES) capabilities. Each signature includes:
From startups to Fortune 500 companies, XactoSign powers digital signatures for every use case.
Embed signature workflows directly into your SaaS platform for seamless customer onboarding.
Close deals faster with compliant e-signatures for leases, purchase agreements, and disclosures.
Streamline employee contracts, NDAs, and benefit enrollments with automated workflows.
Securely execute client agreements, retainers, and legal documents with full audit trails.
Legally compliant signatures for loan documents, account openings, and financial compliance forms.
Secure patient consent forms, treatment authorizations, and medical records with full encryption.
Vendor agreements, supplier contracts, and terms of service signed at scale.
Student enrollment forms, financial aid documents, and parent consent forms digitized.
API Uptime SLA
Average Response Time
Countries Supported
Starting Price
Start free, scale as you grow. No hidden fees, no surprises.
Perfect for testing and small projects
Starting as low as $29/month
For high-volume organizations
All plans include AES-256 encryption, legally binding signatures, and full API access.
Need a custom plan? Contact us for volume pricing.
Instantly verify the authenticity and integrity of any XactoSign document.
Upload any signed document to verify its cryptographic signature, check for tampering, and view the complete audit trail including all signers, timestamps, and IP addresses.
Verify a DocumentFree verification • No account required • Instant results
Join thousands of developers building the future of digital agreements.
No credit card required • 100 free signatures/month • Full API access