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Certyneo
Public API v1

Integrate electronic signature into your stack

Send envelopes, track signatures, receive webhooks. Simple REST API, OpenAPI 3.0, curl/Node/Python examples — everything to connect Certyneo to your HRIS, CRM or business software in a few hours.

Quick start

Three steps: create an API key from settings, encode your PDF in base64, send. The response contains the `signUrl` that you can share directly with the recipient.

cURLbash
curl -X POST https://certyneo.com/api/v1/envelopes \
  -H "Authorization: Bearer ck_live_xxxxxxxxxxxxxxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "subject": "Contrat de prestation",
    "signers": [
      { "email": "[email protected]", "name": "Marie Dubois" }
    ],
    "documents": [
      { "name": "contrat.pdf", "base64Pdf": "<base64>" }
    ]
  }'
JavaScript / Nodets
// npm install @certyneo/sdk  (or call fetch directly)
const r = await fetch("https://certyneo.com/api/v1/envelopes", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.CERTYNEO_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    subject: "Contrat de prestation",
    signers: [{ email: "[email protected]", name: "Marie Dubois" }],
    documents: [{ name: "contrat.pdf", base64Pdf }],
  }),
});
const envelope = await r.json();
console.log(envelope.id, envelope.signers[0].signUrl);
Pythonpython
import requests, base64, os

with open("contrat.pdf", "rb") as f:
    base64_pdf = base64.b64encode(f.read()).decode()

r = requests.post(
    "https://certyneo.com/api/v1/envelopes",
    headers={"Authorization": f"Bearer {os.environ['CERTYNEO_API_KEY']}"},
    json={
        "subject": "Contrat de prestation",
        "signers": [{"email": "[email protected]", "name": "Marie Dubois"}],
        "documents": [{"name": "contrat.pdf", "base64Pdf": base64_pdf}],
    },
)
envelope = r.json()
print(envelope["id"], envelope["signers"][0]["signUrl"])

Envelopes

Creation, sending, status tracking, cancellation. An envelope can contain multiple documents and multiple signers (parallel or sequential).

Webhooks

Receive `envelope.created`, `envelope.completed`, `envelope.declined` on the URL of your choice. HMAC SHA-256 on each payload to verify the origin.

Simple authentication

Bearer token. One key per environment (test / prod). Instantly revocable. Limit 100 req/min/key, burst of 200, clean 429 with Retry-After header.

Available endpoints

12 routes covering the complete cycle: envelopes, documents, webhooks, API keys. All routes accept a Bearer token and return JSON.

MethodPathDescription
GET/api/v1/envelopesList envelopes
POST/api/v1/envelopesCreate + send
GET/api/v1/envelopes/{id}Fetch state
DELETE/api/v1/envelopes/{id}Void
POST/api/v1/envelopes/{id}/sendRe-trigger send
GET/api/v1/documentsList documents
GET/api/v1/webhooksList webhooks
POST/api/v1/webhooksRegister webhook
DELETE/api/v1/webhooks/{id}Unregister
GET/api/v1/keysList API keys
POST/api/v1/keysCreate API key
DELETE/api/v1/keys/{id}Revoke key

Rate limits

Rate limits ensure stable service quality for all clients. If you need more, contact us.

  • 100 requests per minute per API key
  • Burst tolerated up to 200 requests in less than 10 seconds
  • 429 response with Retry-After header indicating the delay in seconds