> For the complete documentation index, see [llms.txt](https://docs.mercuri.cx/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mercuri.cx/features/introduction-mercuri-api/faqs.md).

# FAQs

<details>

<summary>Where can I find the phone number ID of my WhatsApp / SMS number?</summary>

<figure><img src="https://392978341-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsZtOBCP9JV8XEWJpUU4t%2Fuploads%2FCeD9NfP43N4ElPRnT507%2Fnumber%20id%20.png?alt=media&amp;token=65e73d66-5688-4094-86e1-df70661cd017" alt=""><figcaption></figcaption></figure>

1. Navigate to **Settings → Channels** from the left-hand sidebar.
2. In the **Channel Configurations** section, select the **WhatsApp** / **SMS** channel.
3. Locate your registered WhatsApp/SMS number and click on the **three dots (⋮)** menu on the right-hand side.
4. From the dropdown options, click on **Copy Phone Number ID**.&#x20;

📌 *Refer to the highlighted areas in the image for easy navigation.*

</details>

<details>

<summary>How to find the Template ID of any WhatsApp / SMS template?</summary>

<figure><img src="https://392978341-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsZtOBCP9JV8XEWJpUU4t%2Fuploads%2FMOflroWHUXRCOKhANO8Z%2Fimage.png?alt=media&amp;token=090e62df-27e4-4f4a-8991-4f4b4ad42a3b" alt=""><figcaption></figcaption></figure>

1. Navigate to **Templates → WhatsApp/SMS** from the left-hand sidebar.
2. Locate the template for which you want to copy the **Template ID**.
3. On the bottom-right corner of the template card, click on the **three dots (⋮)** menu.
4. From the dropdown options, select **Copy Template ID**. The ID will be copied to your clipboard.

📌 *Refer to the highlighted areas in the image for guidance.*

</details>

<details>

<summary>Why am I seeing a sample PDF in the header instead of my actual PDF while testing the template?</summary>

This usually happens when the PDF URL provided is an **auto-download URL** instead of a **publicly accessible URL**. Auto-download URLs are not supported, so the system falls back to showing a sample PDF in the header.

**Solution:**

* Ensure the PDF is hosted on a **public URL** that can be accessed directly in the browser.
* Avoid URLs that trigger an automatic download.
* You can host the PDF on an **S3 bucket or any other blob storage service**.

</details>