# Power Pack License Requirement for SMS API Usage

**URL:** <https://devforum.zoom.us/t/power-pack-license-requirement-for-sms-api-usage/142525>\
**Category:** API and Webhooks\
**Tags:** phone, api\
**Created:** [March 19, 2026, 10:39pm UTC](https://devforum.zoom.us/t/power-pack-license-requirement-for-sms-api-usage/142525 "2026-03-19T22:39:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Joseph6](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/joseph6/32/54129_2.png) [@Joseph6](https://devforum.zoom.us/u/Joseph6)\
**Post date:** [March 19, 2026, 10:39pm UTC](https://devforum.zoom.us/t/power-pack-license-requirement-for-sms-api-usage/142525/1 "2026-03-19T22:39:32Z")

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### 

**API Endpoint(s) and/or Zoom API Event(s)**  
method: ‘POST’,  
url: ‘[https://api.zoom.us/v2/phone/sms/messages’](https://api.zoom.us/v2/phone/sms/messages%E2%80%99),

> **[Phone APIs - API - Zoom Developer Docs](https://developers.zoom.us/docs/api/phone/#tag/sms/post/phone/sms/messages)**
>
> You can access information from Zoom with Zoom Phone APIs to build private services or public applications on the Zoom App Marketplace.

**Description**  
Is a **Power Pack license required for every user sending SMS via the API**?

I tested the API using both an **S2S app** and a **general app** , and it only works when the user sending the SMS has a **Power Pack license**.

It works when:

- The user sends SMS from **their assigned number** , or

- From a **call queue number where the user is a member**.

It does **not work** when:

- The user with the **Power Pack license** sends SMS **on behalf of another user** , or

- The SMS is sent from a **number not assigned to that user**.

Could you please confirm if this behavior is expected? Also, do we need to purchase a Power Pack license for every user who needs to send SMS via the API, or is there a workaround? Requiring a license per user becomes very costly as the number of users increases.

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<div class="post-metadata">

**Author:** ![gianni.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/gianni.zoom/32/32523_2.png) [@gianni.zoom](https://devforum.zoom.us/u/gianni.zoom)\
**Post date:** [March 20, 2026, 4:47pm UTC](https://devforum.zoom.us/t/power-pack-license-requirement-for-sms-api-usage/142525/2 "2026-03-20T16:47:44Z")

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Hi @Joseph6 ,

 ![Screenshot 2026-03-20 at 12.39.47 PM](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/4/d/4d85e3442d241453cc247daa573f7d8274a724bf.png)

I don’t see Power Pack license listed as a prerequisite in the documentation, but thank you for sharing your observation from testing! The [support/billing team](https://support.zoom.com/hc/en) will be able to give you the most accurate answer quickly on this. I will ask internally as well.