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+---
+sidebar_position: 3
+title: API Token
+---
+
+# 🔐 API Authentication – Setting up Your `x-api-token`
+
+To authenticate and use OpenSign API endpoints, you’ll need a valid API token (`x-api-token`).
+
+Follow the steps below to generate one.
+
+**Note:** You can generate both **Live** and **Sandbox** API tokens from your OpenSign account.
+
+---
+
+## 🧭 Step-by-Step Guide to Generate Your API Token
+
+**Step 1:** Log in to your OpenSign account using valid credentials. 
+
+**Step 2:** Navigate to the **Settings** section and click on **API Token**.  
+
+**Step 3:** On the API Token page, click the **Generate Live API Token** button.
+
+<img width="436" alt="Navigate-to-Api-token" src="https://github.com/user-attachments/assets/8079ecb5-ad5b-4ce6-8d6c-14395130a654"></img>
+
+<img width="436" alt="Generate token" src="https://github.com/user-attachments/assets/6188ae46-0f40-4de6-9903-33ae0aa4e63f"></img>
+
+
+- Your `x-api-token` will now be generated and displayed.
+- **Copy this token** — you’ll use it to authenticate OpenSign API requests.
+
+**Optional:**  
+On the same page, you’ll also find the option to generate a **Sandbox API Token** for development and testing purposes.
+
+---
+
+## 🧠 Frequently Asked Questions
+
+**1. What is the OpenSign Sandbox environment?**  
+The Sandbox is a testing environment designed for developers to safely experiment with OpenSign APIs and workflows. It mirrors the live environment but with testing limitations.
+
+
+**2. Can I upload large documents to the Sandbox?**  
+No. Please avoid uploading documents larger than **5MB** in the Sandbox. It is optimized for lightweight testing only.
+
+
+**3. Can I use my live API token in the Sandbox?**  
+No. **Live API tokens do not work** in the Sandbox environment. You’ll need to generate a separate token specific to Sandbox testing.
+
+
+**4. Why can’t I use a live template in the Sandbox?**  
+Live and Sandbox environments are **separate**. Templates created in the live environment cannot be used in the Sandbox, and vice versa.
+
+
+**5. Can I use the API in the free self-hosted environment?**  
+No. We do not support generating API tokens in the **free self-hosted version**.  
+If you want to use OpenSign APIs in a self-hosted setup, you must upgrade to the **paid self-hosted plan**.