Secure Electronic Signatures

Template-driven, fully automated, legally compliant signing for your business.

Template-Driven

Define documents as JSON templates. No GUI builder needed. API call creates and sends for signing instantly.

Legally Compliant

Full compliance with ESIGN Act and UETA. Every action is timestamped with IP, user agent, and intent to sign.

Tamper-Evident Audit

Hash-chained audit log with GitHub anchoring. Every view, sign, and download is cryptographically linked.

Dual-Provider Email

Signing requests delivered via ZeptoMail with automatic Resend failover. No lost emails.

Webhook Notifications

HMAC-signed webhook callbacks when all parties sign. Integrate with any workflow.

WORM Storage

Signed documents stored in R2 with WORM policy. 3-year retention. Immutable records.

Simple API

POST /api/envelopes
Authorization: Bearer <jwt>

{
  "template": "nda-mutual",
  "signers": [
    {"email": "alice@example.com", "name": "Alice", "role": "party_a"},
    {"email": "bob@example.com", "name": "Bob", "role": "party_b"}
  ],
  "fields": {
    "company_name": "Acme Corp",
    "effective_date": "2026-03-04"
  },
  "callback_url": "https://yourapp.com/webhooks/signing"
}