# External Collection \> Using Dynamic values

**URL:** https://forum.adalo.com/t/external-collection-using-dynamic-values/57261
**Category:** External Collections, Custom Actions & Collections
**Created:** [July 14, 2025, 7:41pm UTC](https://forum.adalo.com/t/external-collection-using-dynamic-values/57261 "2025-07-14T19:41:53Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Triade\_Capital](https://avatars.discourse-cdn.com/v4/letter/t/d2c977/32.png) [@Triade\_Capital](https://forum.adalo.com/u/Triade_Capital)
#### Post date: [July 14, 2025, 7:41pm UTC](https://forum.adalo.com/t/external-collection-using-dynamic-values/57261/1 "2025-07-14T19:41:53Z")

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I need help with an External Collection (GET method).

When I use manually written values in the headers, it works just fine and I am able to save the External Collection and continue my work.

BUT, there are 2 headers that should bring Dynamic values from my User’s collection.  
One of them is the bearer token, and the other one is the user\_id.

And when I try to set the collection with Dynamic values from my User’s collection the API shows me as failure and doesn’t allow me to save the External Collection.

What should I do?

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### Author: ![Triade\_Capital](https://avatars.discourse-cdn.com/v4/letter/t/d2c977/32.png) [@Triade\_Capital](https://forum.adalo.com/u/Triade_Capital)
#### Post date: [July 14, 2025, 7:42pm UTC](https://forum.adalo.com/t/external-collection-using-dynamic-values/57261/2 "2025-07-14T19:42:43Z")

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![Screenshot 2025-07-14 at 4.37.01 PM](https://us1.discourse-cdn.com/flex020/uploads/adalo/original/3X/d/b/db3dfdc79821148c0f388325096764b966668152.png)

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### Author: ![shirley58richards](https://avatars.discourse-cdn.com/v4/letter/s/49beb7/32.png) [@shirley58richards](https://forum.adalo.com/u/shirley58richards)
#### Post date: [July 24, 2025, 6:55am UTC](https://forum.adalo.com/t/external-collection-using-dynamic-values/57261/3 "2025-07-24T06:55:22Z")

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Hello,  
When dynamically fetching a bearer token and `user_id` from a user’s collection for External Collection headers, common issues preventing saving include incorrect data type/format, asynchronous loading of values (leading to nulls during setup), or platform restrictions on dynamic header configuration at save time. Ensure the values are correctly formatted and available, or use pre-request scripts/intermediary functions if your platform requires runtime injection rather than static saving of dynamic headers.