feat(integrations): Add support for Dropbox sign

docs-v2/integrations/all/dropbox-sign-oauth.mdx

@@ -0,0 +1,59 @@
+---
+title: Dropbox Sign (OAuth)
+sidebarTitle: Dropbox Sign (OAuth)
+---
+
+import Overview from "/snippets/overview.mdx"
+import PreBuiltTooling from "/snippets/generated/dropbox-sign-oauth/PreBuiltTooling.mdx"
+import PreBuiltUseCases from "/snippets/generated/dropbox-sign-oauth/PreBuiltUseCases.mdx"
+
+<Overview />
+<PreBuiltTooling />
+<PreBuiltUseCases />
+
+## Access requirements
+| Pre-Requisites | Status | Comment|
+| - | - | - |
+| Paid dev account | ✅ Required | Free developer account available |
+| Paid test account | ✅ Required | Free test account available |
+| Partnership | ❌ Not required | |
+| App review | ✅ Required | Required for production use |
+| Security audit | ❌ Not required | |
+
+## Setup guide
+
+_No setup guide yet._
+
+<Tip>Need help getting started? Get help in the [community](https://nango.dev/slack).</Tip>
+
+<Note>Contribute improvements to the setup guide by [editing this page](https://github.com/nangohq/nango/tree/master/docs-v2/integrations/all/dropbox-sign-oauth.mdx)</Note>
+
+## Useful links
+
+-   [OAuth Walkthrough](https://developers.hellosign.com/docs/oauth/walkthrough/)
+-   [OAuth Overview](https://developers.hellosign.com/docs/oauth/overview/)
+-   [App Approval Process](https://developers.hellosign.com/docs/oauth/app-approval/)
+-   [API Documentation](https://developers.hellosign.com/docs/api/overview/)
+
+<Note>Contribute useful links by [editing this page](https://github.com/nangohq/nango/tree/master/docs-v2/integrations/all/dropbox-sign-oauth.mdx)</Note>
+
+## API gotchas
+
+- Dropbox Sign requires production approval for apps using OAuth. Your app cannot be authorized or added by other users until it is approved for production.
+- You can test OAuth by authorizing your app from your own account while building.
+- The OAuth flow supports two scenarios:
+  1. Authorization code flow - for users with existing Dropbox Sign accounts
+  2. Account creation flow - for new users to Dropbox Sign
+- Access tokens are only valid for about an hour. You'll need to use the refresh token to generate new access tokens.
+- When creating an app, you'll need to provide:
+  - App name
+  - OAuth callback URL
+  - Scopes (actions your app will be allowed to perform)
+
+<Note>Contribute API gotchas by [editing this page](https://github.com/nangohq/nango/tree/master/docs-v2/integrations/all/dropbox-sign-oauth.mdx)</Note>
+
+## Going further
+
+<Card title="Connect to Dropbox Sign OAuth" icon="link" href="/integrations/all/dropbox-sign-oauth/connect" horizontal>
+  Guide to connect to Dropbox Sign OAuth using Connect UI
+</Card> 

docs-v2/integrations/all/dropbox-sign-oauth/connect.mdx

@@ -0,0 +1,51 @@
+---
+title: Dropbox Sign OAuth - How do I link my account?
+sidebarTitle: Dropbox Sign OAuth
+---
+
+# Overview
+
+To authenticate with Dropbox Sign OAuth, you need:
+1. **Client ID** - A unique identifier for your application.
+2. **Client Secret** - A confidential key used to authenticate the identity of the application.
+
+This guide will walk you through creating an app and obtaining these credentials within Dropbox Sign.
+
+### Prerequisites:
+
+- You must have a Dropbox Sign account.
+
+### Instructions:
+
+#### Step 1: Creating an App
+1. Log in to your [Dropbox Sign Developer Portal](https://app.hellosign.com).
+2. Click on the profile icon in the top right corner and select **Settings**.
+3. Click on the **API** tab.
+4. Scroll down and click on the **Create an App** button.
+5. Enable **OAuth** and fill in the required information:
+   - **App Name**: Your application's name
+   - **OAuth Callback**: Add `https://api.nango.dev/oauth/callback` or your own callback URL from your Nango dashboard
+   - **Scopes**: Select the actions your app needs to perform
+4. Click **Create App** to generate your credentials.
+
+#### Step 2: Obtaining Credentials
+1. After creating your app, you'll be provided with:
+   - **Client ID**
+   - **Client Secret**
+2. Make a copy of these credentials, as they will be needed when configuring your integration in Nango. The **Client Secret** will not be shown again, so ensure you store it securely.
+
+#### Step 3: App Approval
+1. Before your app can be used in production, it needs to be approved by Dropbox Sign.
+2. You can test your app by authorizing it from your own account while building.
+3. When ready for production, follow the [App Approval Process](https://developers.hellosign.com/docs/app-approval/overview/).
+
+#### Step 4: Enter credentials in the Connect UI
+
+Once you have your **Client ID** and **Client Secret**:
+1. Open the form where you need to authenticate with Dropbox Sign OAuth.
+2. Enter the **Client ID** and **Client Secret** in their designated fields.
+3. Submit the form, and you should be successfully authenticated.
+
+<img src="/integrations/all/dropbox-sign-oauth/form.png" style={{maxWidth: "450px" }}/>
+
+You are now connected to Dropbox Sign OAuth. 

docs-v2/snippets/generated/dropbox-sign-oauth/PreBuiltTooling.mdx

@@ -0,0 +1,42 @@
+## Pre-built tooling
+<AccordionGroup>
+<Accordion title="✅ Authorization">
+| Tools | Status |
+| - | - |
+| Pre-built authorization (OAuth) | ✅ |
+| Credentials auto-refresh | ✅ |
+| Auth parameters validation | ✅ |
+| Pre-built authorization UI | ✅ |
+| Custom authorization UI | ✅ |
+| End-user authorization guide | ✅ |
+| Expired credentials detection | ✅ |
+</Accordion>
+<Accordion title="✅ Read & write data">
+| Tools | Status |
+| - | - |
+| Pre-built integrations | 🚫 (time to contribute: &lt;48h) |
+| API unification | ✅ |
+| 2-way sync | ✅ |
+| Webhooks from Nango on data modifications | ✅ |
+| Real-time webhooks from 3rd-party API | 🚫 (time to contribute: &lt;48h) |
+| Proxy requests | ✅ |
+</Accordion>
+<Accordion title="✅ Observability & data quality">
+| Tools | Status |
+| - | - |
+| HTTP request logging | ✅ |
+| End-to-type type safety | ✅ |
+| Data runtime validation | ✅ |
+| OpenTelemetry export | ✅ |
+| Slack alerts on errors | ✅ |
+| Integration status API | ✅ |
+</Accordion>
+<Accordion title="✅ Customization">
+| Tools | Status |
+| - | - |
+| Create or customize use-cases | ✅ |
+| Pre-configured pagination | 🚫 (time to contribute: &lt;48h) |
+| Pre-configured rate-limit handling | 🚫 (time to contribute: &lt;48h) |
+| Per-customer configurations | ✅ |
+</Accordion>
+</AccordionGroup>

docs-v2/snippets/generated/dropbox-sign-oauth/PreBuiltUseCases.mdx

@@ -0,0 +1,5 @@
+## Pre-built integrations
+
+_No pre-built integration yet (time to contribute: <48h)_
+
+<Tip>Not seeing the integration you need? [Build your own](https://docs.nango.dev/guides/custom-integrations/overview) independently.</Tip>

packages/providers/providers.yaml

@@ -3098,6 +3098,25 @@ dropbox:
         base_url: https://api.dropboxapi.com
     docs: https://docs.nango.dev/integrations/all/dropbox
 
+dropbox-sign-oauth:
+    display_name: Dropbox Sign (OAuth)
+    categories:
+        - legal
+    auth_mode: OAUTH2
+    authorization_url: https://app.hellosign.com/oauth/authorize
+    token_url: https://app.hellosign.com/oauth/token
+    authorization_params:
+        response_type: code
+    token_params:
+        grant_type: authorization_code
+    refresh_params:
+        grant_type: refresh_token
+    refresh_url: https://app.hellosign.com/oauth/token?refresh
+    proxy:
+        base_url: https://api.hellosign.com
+    docs: https://docs.nango.dev/integrations/all/dropbox-sign-oauth
+    docs_connect: https://docs.nango.dev/integrations/all/dropbox-sign-oauth/connect
+
 drupal:
     display_name: Drupal
     categories: