API

NevTan Sign REST API

Send, sign, and track envelopes programmatically. Create a free account to get an API key — no sales call required.

Base URL

https://sign.deploy.cylontechnology.com/api/v1

Authentication

Every request needs your API key in this header:

X-API-Key: <your-api-key>

Getting a key

API keys are generated from your account's Developer Portal once you're signed in — there's nothing to request or wait on. Create a free account, then generate a key from there.

Quick start

List envelopes (cURL)

curl -X GET "https://sign.deploy.cylontechnology.com/api/v1/envelopes/" \
  -H "X-API-Key: <your-api-key>"

Create envelope (cURL)

curl -X POST "https://sign.deploy.cylontechnology.com/api/v1/envelopes/" \
  -H "X-API-Key: <your-api-key>" \
  -H "Content-Type: application/json" \
  -d '{"document_ids":["<file_id>"],"participants":[]}'

Python

import requests

API_KEY = "<your-api-key>"
BASE_URL = "https://sign.deploy.cylontechnology.com/api/v1"

headers = {"X-API-Key": API_KEY}

# List your envelopes
resp = requests.get(f"{BASE_URL}/envelopes/", headers=headers)
print(resp.json())

Key endpoints

The most-used routes in the REST API.

GET

/envelopes/

List all envelopes you own or participate in

POST

/envelopes/

Create a new envelope

GET

/envelopes/{id}/download

Download the signed PDF

POST

/envelopes/{id}/send-invitations

Email signing links to all recipients

POST

/documents/{id}/fields

Save field positions (owner placement)

POST

/documents/{id}/sign

Stamp a signature onto a document

GET

/users/{id}/quota

Fetch quota / credit balance