Signnow Document Signing Integration

---
name: signnow-document-signing-integration
description: "SignNow API integration with managed OAuth. E-signature platform for sending, signing, and managing documents. Use this skill when users want to upload documents, send signature invites, create templates, or manage e-signature workflows. For other third party apps, use the api-g…"
category: "Integrations"
author: community
version: "1.0.2"
icon: plug
---

# 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

```
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:

```
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

1. Sign in or create an account at [maton.ai](https://maton.ai)
2. Go to [maton.ai/settings](https://maton.ai/settings)
3. 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

1. Check that the `MATON_API_KEY` environment variable is set:

```bash
echo $MATON_API_KEY
```

2. 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

1. Ensure your URL path starts with `signnow`. For example:

- Correct: `https://gateway.maton.ai/signnow/user`
- Incorrect: `https://gateway.maton.ai/user`

## Resources

- [SignNow API Reference](https://docs.signnow.com/docs/signnow/reference)
- [SignNow Developer Portal](https://www.signnow.com/developers)
- [SignNow Postman Collection](https://github.com/signnow/postman-collection)
- [SignNow SDKs](https://github.com/signnow)
- [Maton Community](https://discord.com/invite/dBfFAcefs2)
- [Maton Support](mailto:support@maton.ai)