SignNow

Access the SignNow API with managed OAuth authentication. Upload documents, send signature invites, manage templates, and automate e-signature workflows.

Quick Start

bash

# Get current user info
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/signnow/user')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

code

https://gateway.maton.ai/signnow/{resource}

The gateway proxies requests to api.signnow.com and automatically injects your OAuth token.

Authentication

All requests require the Maton API key in the Authorization header:

code

Authorization: Bearer $MATON_API_KEY

Environment Variable: Set your API key as MATON_API_KEY:

bash

export MATON_API_KEY="YOUR_API_KEY"

Getting Your API Key

•Sign in or create an account at maton.ai
•Go to maton.ai/settings
•Copy your API key

Connection Management

Manage your SignNow OAuth connections at https://ctrl.maton.ai.

List Connections

bash

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections?app=signnow&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Create Connection

bash

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'signnow'}).encode()
req = urllib.request.Request('https://ctrl.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Get Connection

bash

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

json

{
  "connection": {
    "connection_id": "5ff5474b-5f21-41ba-8bf3-afb33cce5a75",
    "status": "ACTIVE",
    "creation_time": "2026-02-08T20:47:23.019763Z",
    "last_updated_time": "2026-02-08T20:50:32.210896Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "signnow",
    "metadata": {}
  }
}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection

bash

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Specifying Connection

If you have multiple SignNow connections, specify which one to use with the Maton-Connection header:

bash

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/signnow/user')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '5ff5474b-5f21-41ba-8bf3-afb33cce5a75')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If omitted, the gateway uses the default (oldest) active connection.

API Reference

User Operations

Get Current User

bash

GET /signnow/user

Response:

json

{
  "id": "59cce130e93a4e9488522ca67e3a6779f3e48a72",
  "first_name": "Chris",
  "last_name": "Kim",
  "active": "1",
  "verified": true,
  "emails": ["chris@example.com"],
  "primary_email": "chris@example.com",
  "document_count": 0,
  "subscriptions": [...],
  "teams": [...],
  "organization": {...}
}

Get User Documents

bash

GET /signnow/user/documents

Response:

json

[
  {
    "id": "c63a7bc73f03449c987bf0feaa36e96212408352",
    "document_name": "Contract",
    "page_count": "3",
    "created": "1770598603",
    "updated": "1770598603",
    "original_filename": "contract.pdf",
    "owner": "chris@example.com",
    "template": false,
    "roles": [],
    "field_invites": [],
    "signatures": []
  }
]

Document Operations

Upload Document

Documents must be uploaded as multipart form data with a PDF file:

bash

python <<'EOF'
import urllib.request, os, json

def encode_multipart_formdata(files):
    boundary = '----WebKitFormBoundary7MA4YWxkTrZu0gW'
    lines = []
    for (key, filename, content) in files:
        lines.append(f'--{boundary}'.encode())
        lines.append(f'Content-Disposition: form-data; name="{key}"; filename="{filename}"'.encode())
        lines.append(b'Content-Type: application/pdf')
        lines.append(b'')
        lines.append(content)
    lines.append(f'--{boundary}--'.encode())
    lines.append(b'')
    body = b'\r\n'.join(lines)
    content_type = f'multipart/form-data; boundary={boundary}'
    return content_type, body

with open('document.pdf', 'rb') as f:
    file_content = f.read()

content_type, body = encode_multipart_formdata([('file', 'document.pdf', file_content)])
req = urllib.request.Request('https://gateway.maton.ai/signnow/document', data=body, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', content_type)
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

json

{
  "id": "c63a7bc73f03449c987bf0feaa36e96212408352"
}

Get Document

bash

GET /signnow/document/{document_id}

Response:

json

{
  "id": "c63a7bc73f03449c987bf0feaa36e96212408352",
  "document_name": "Contract",
  "page_count": "3",
  "created": "1770598603",
  "updated": "1770598603",
  "original_filename": "contract.pdf",
  "owner": "chris@example.com",
  "template": false,
  "roles": [],
  "viewer_roles": [],
  "attachments": [],
  "fields": [],
  "signatures": [],
  "texts": [],
  "checks": []
}

Update Document

bash

PUT /signnow/document/{document_id}
Content-Type: application/json

{
  "document_name": "Updated Contract Name"
}

Response:

json

{
  "id": "c63a7bc73f03449c987bf0feaa36e96212408352",
  "signatures": [],
  "texts": [],
  "checks": []
}

Download Document

bash

GET /signnow/document/{document_id}/download?type=collapsed

Returns the PDF file as binary data.

Query parameters:

•type - Download type: collapsed (flattened PDF), zip (all pages as images)

Get Document History

bash

GET /signnow/document/{document_id}/historyfull

Response:

json

[
  {
    "unique_id": "c4eb89d84b2b407ba8ec1cf4d25b8b435bcef69d",
    "user_id": "59cce130e93a4e9488522ca67e3a6779f3e48a72",
    "document_id": "c63a7bc73f03449c987bf0feaa36e96212408352",
    "email": "chris@example.com",
    "created": 1770598603,
    "event": "created_document"
  }
]

Move Document to Folder

bash

POST /signnow/document/{document_id}/move
Content-Type: application/json

{
  "folder_id": "5e2798bdd3d642c3aefebe333bb5b723d6db01a4"
}

Response:

json

{
  "result": "success"
}

Merge Documents

Combines multiple documents into a single PDF:

bash

POST /signnow/document/merge
Content-Type: application/json

{
  "name": "Merged Document",
  "document_ids": ["doc_id_1", "doc_id_2"]
}

Returns the merged PDF as binary data.

Delete Document

bash

DELETE /signnow/document/{document_id}

Response:

json

{
  "status": "success"
}

Template Operations

Create Template from Document

bash

POST /signnow/template
Content-Type: application/json

{
  "document_id": "c63a7bc73f03449c987bf0feaa36e96212408352",
  "document_name": "Contract Template"
}

Response:

json

{
  "id": "47941baee4f74784bc1d37c25e88836fc38ed501"
}

Create Document from Template

bash

POST /signnow/template/{template_id}/copy
Content-Type: application/json

{
  "document_name": "New Contract from Template"
}

Response:

json

{
  "id": "08f5f4a2cc1a4d6c8a986adbf90be2308807d4ae",
  "name": "New Contract from Template"
}

Signature Invite Operations

Send Freeform Invite

Send a document for signature:

bash

POST /signnow/document/{document_id}/invite
Content-Type: application/json

{
  "to": "signer@example.com",
  "from": "sender@example.com"
}

Response:

json

{
  "result": "success",
  "id": "c38a57f08f2e48d98b5de52f75f7b1dd0a074c00",
  "callback_url": "none"
}

Note: Custom subject and message require a paid subscription plan.

Create Signing Link

Create an embeddable signing link (requires document fields):

bash

POST /signnow/link
Content-Type: application/json

{
  "document_id": "c63a7bc73f03449c987bf0feaa36e96212408352"
}

Note: Document must have signature fields added before creating a signing link.

Folder Operations

Get All Folders

bash

GET /signnow/folder

Response:

json

{
  "id": "2ea71a3a9d06470d8e5ec0df6122971f47db7706",
  "name": "Root",
  "system_folder": true,
  "folders": [
    {
      "id": "5e2798bdd3d642c3aefebe333bb5b723d6db01a4",
      "name": "Documents",
      "document_count": "5",
      "template_count": "2"
    },
    {
      "id": "fafdef6de6d947fc84627e4ddeed6987bfeee02d",
      "name": "Templates",
      "document_count": "0",
      "template_count": "3"
    },
    {
      "id": "6063688b1e724a25aa98befcc3f2cb7795be7da1",
      "name": "Trash Bin",
      "document_count": "0"
    }
  ],
  "total_documents": 0,
  "documents": []
}

Get Folder by ID

bash

GET /signnow/folder/{folder_id}

Response:

json

{
  "id": "5e2798bdd3d642c3aefebe333bb5b723d6db01a4",
  "name": "Documents",
  "user_id": "59cce130e93a4e9488522ca67e3a6779f3e48a72",
  "parent_id": "2ea71a3a9d06470d8e5ec0df6122971f47db7706",
  "system_folder": true,
  "folders": [],
  "total_documents": 5,
  "documents": [...]
}

Webhook (Event Subscription) Operations

List Event Subscriptions

bash

GET /signnow/event_subscription

Response:

json

{
  "subscriptions": [
    {
      "id": "b1d6700dfb0444ed9196e913b2515ae8d5f731a7",
      "event": "document.complete",
      "created": "1770598678",
      "callback_url": "https://example.com/webhook"
    }
  ]
}

Create Event Subscription

bash

POST /signnow/event_subscription
Content-Type: application/json

{
  "event": "document.complete",
  "callback_url": "https://example.com/webhook"
}

Response:

json

{
  "id": "b1d6700dfb0444ed9196e913b2515ae8d5f731a7",
  "created": 1770598678
}

Available Events:

•document.create - Document created
•document.update - Document updated
•document.delete - Document deleted
•document.complete - Document signed by all parties
•invite.create - Invite sent
•invite.update - Invite updated

Delete Event Subscription

bash

DELETE /signnow/event_subscription/{subscription_id}

Response:

json

{
  "id": "b1d6700dfb0444ed9196e913b2515ae8d5f731a7",
  "status": "deleted"
}

Code Examples

JavaScript

javascript

const response = await fetch(
  'https://gateway.maton.ai/signnow/user',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    }
  }
);
const data = await response.json();

Python

python

import os
import requests

response = requests.get(
    'https://gateway.maton.ai/signnow/user',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'}
)
data = response.json()

Python (Upload Document)

python

import os
import requests

with open('document.pdf', 'rb') as f:
    response = requests.post(
        'https://gateway.maton.ai/signnow/document',
        headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'},
        files={'file': ('document.pdf', f, 'application/pdf')}
    )
doc = response.json()
print(f"Uploaded document: {doc['id']}")

Python (Send Invite)

python

import os
import requests

doc_id = "c63a7bc73f03449c987bf0feaa36e96212408352"
response = requests.post(
    f'https://gateway.maton.ai/signnow/document/{doc_id}/invite',
    headers={
        'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}',
        'Content-Type': 'application/json'
    },
    json={
        'to': 'signer@example.com',
        'from': 'sender@example.com'
    }
)
result = response.json()
print(f"Invite sent: {result['id']}")

Notes

•Documents must be in PDF format for upload
•Supported file types: PDF, DOC, DOCX, ODT, RTF, PNG, JPG
•System folders (Documents, Templates, Archive, Trash Bin) cannot be renamed or deleted
•Creating signing links requires documents to have signature fields
•Custom invite subject/message requires a paid subscription
•Rate limit in development mode: 500 requests/hour per application
•IMPORTANT: When piping curl output to jq or other commands, environment variables like $MATON_API_KEY may not expand correctly in some shell environments

Error Handling

Status	Meaning
400	Missing SignNow connection or bad request
401	Invalid or missing Maton API key
403	Insufficient permissions or subscription required
404	Resource not found
405	Method not allowed
429	Rate limited
4xx/5xx	Passthrough error from SignNow API

SignNow errors include detailed messages:

json

{
  "errors": [
    {
      "code": 65578,
      "message": "Invalid file type."
    }
  ]
}

Troubleshooting: API Key Issues

•Check that the MATON_API_KEY environment variable is set:

bash

echo $MATON_API_KEY

•Verify the API key is valid by listing connections:

bash

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Troubleshooting: Invalid App Name

•Ensure your URL path starts with signnow. For example:

•Correct: https://gateway.maton.ai/signnow/user
•Incorrect: https://gateway.maton.ai/user

SignNow

Quick Start

Base URL

Authentication

Getting Your API Key

Connection Management

List Connections

Create Connection

Get Connection

Delete Connection

Specifying Connection

API Reference

User Operations

Get Current User

Get User Documents

Document Operations

Upload Document

Get Document

Update Document

Download Document

Get Document History

Move Document to Folder

Merge Documents

Delete Document

Template Operations

Create Template from Document

Create Document from Template

Signature Invite Operations

Send Freeform Invite

Create Signing Link

Folder Operations

Get All Folders

Get Folder by ID

Webhook (Event Subscription) Operations

List Event Subscriptions

Create Event Subscription

Delete Event Subscription

Code Examples

JavaScript

Python

Python (Upload Document)

Python (Send Invite)

Notes

Error Handling

Troubleshooting: API Key Issues

Troubleshooting: Invalid App Name

Resources