Developers

An API you can read in one sitting.

Ecylaa is built API-first. Create a template, send an envelope, and listen for the signed result — without wrangling PDF libraries or signature law.

server.ts

import { Ecylaa } from "@ecylaa/node"

const ecylaa = new Ecylaa(process.env.ECYLAA_KEY)

// Render a template and send it for signature
const envelope = await ecylaa.envelopes.create({
  template_id: "tpl_msa",
  recipients: [
    { name: "Robin Lefoyer", email: "robin@acme.com", role: "signer" },
  ],
  fields: { company: "Acme Ltd", effective_date: "2026-07-01" },
})

console.log(envelope.id)      // env_8fa3...
console.log(envelope.status)  // "sent"

Predictable REST API

Resource-oriented endpoints, idempotency keys, and clear errors. If you've used a modern API, you already know ours.

Official SDKs

First-class libraries for JavaScript, Python, Go, Ruby, PHP, and Java — typed, versioned, and documented.

Webhooks & events

Subscribe to envelope.sent, envelope.viewed, and envelope.completed with signed payloads and automatic retries.

Embedded signing

Drop the signing experience into your own app with a short-lived URL or our prebuilt component.

Webhooks

Know the moment it's signed.

No polling. When the last recipient signs, Ecylaa posts a signed event to your endpoint with the finished PDF and the sealed certificate of completion.

events: sent · viewed · declined · completed

POST /your-webhook

{
  "event": "envelope.completed",
  "data": {
    "id": "env_8fa3c1",
    "status": "completed",
    "signed_pdf_url": "https://api.ecylaa-pro.com/...",
    "certificate_url": "https://api.ecylaa-pro.com/..."
  }
}

Ready to build?

Request a key and you'll be sending test envelopes in minutes.