# "SendbirdError: 500910 Too many requests" When trying to send signed up users welcome messages during stress test

**URL:** <https://community.sendbird.com/t/sendbirderror-500910-too-many-requests-when-trying-to-send-signed-up-users-welcome-messages-during-stress-test/3840>\
**Category:** API\
**Tags:** chatsdk\
**Created:** [January 25, 2022, 12:08am UTC](https://community.sendbird.com/t/sendbirderror-500910-too-many-requests-when-trying-to-send-signed-up-users-welcome-messages-during-stress-test/3840 "2022-01-25T00:08:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![gabevama](https://avatars.discourse-cdn.com/v4/letter/g/cc9497/32.png) [@gabevama](https://community.sendbird.com/u/gabevama)\
**Post date:** [January 25, 2022, 12:08am UTC](https://community.sendbird.com/t/sendbirderror-500910-too-many-requests-when-trying-to-send-signed-up-users-welcome-messages-during-stress-test/3840/1 "2022-01-25T00:08:03Z")

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We are sending each signed up user a welcome message once they finish signing up. It has been working fine until we started stress testing, and now run into a 500910 after 5-6 signups. We are sending the welcome messages from our API by sending messages to each new user with our master key. Is there a way around this, or a better way to do a welcome message using sendbird?

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**Author:** ![Charis\_Theodoulou](https://sea2.discourse-cdn.com/flex020/user_avatar/community.sendbird.com/charis_theodoulou/32/1401_2.png) [@Charis\_Theodoulou](https://community.sendbird.com/u/Charis_Theodoulou)\
**Post date:** [January 25, 2022, 11:38am UTC](https://community.sendbird.com/t/sendbirderror-500910-too-many-requests-when-trying-to-send-signed-up-users-welcome-messages-during-stress-test/3840/2 "2022-01-25T11:38:38Z")

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Please take note of the API rate limits that are in place for various endpoints and based on your plan.

> **[Rate limits | Chat Platform API | Sendbird Docs](https://sendbird.com/docs/chat/v3/platform-api/guides/rate-limits)**
>
> View rate limits for your Sendbird Chat Platform API.

Try to throttle these requests with a time period that respects the allowed API rate limit.

Conversely, you can leverage Auto Messages when either a user joins a channel or a channel is created depending on how you implement your logic. You can enable auto messages for each event in the Sendbird Dashboard under Settings \> Chat \> Channels \> Group Channels \> Auto message.

 ![image](https://us1.discourse-cdn.com/flex020/uploads/sendbird/original/2X/c/c3d12e6fefef5a572440c74d90f7c9e6ee990d2e.png)