# Postman request to exercise a choice - "The requested resource could not be found."

**URL:** <https://forum.canton.network/t/postman-request-to-exercise-a-choice-the-requested-resource-could-not-be-found/3285>\
**Category:** App Development\
**Tags:** daml, json-api, post, damlhub\
**Created:** [October 10, 2021, 12:02am UTC](https://forum.canton.network/t/postman-request-to-exercise-a-choice-the-requested-resource-could-not-be-found/3285 "2021-10-10T00:02:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Baradwaj\_Aryasomayaj](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/baradwaj_aryasomayaj/32/2562_2.png) [@Baradwaj\_Aryasomayaj](https://forum.canton.network/u/Baradwaj_Aryasomayaj)\
**Post date:** [October 10, 2021, 12:02am UTC](https://forum.canton.network/t/postman-request-to-exercise-a-choice-the-requested-resource-could-not-be-found/3285/1 "2021-10-10T00:02:56Z")

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Hello Guys,

I am trying to make a simple postman call to exercise a choice from the following DAML code. I have published the DAML code in the hub and got my ledgerid and created the parties as well. It is a simple Alice and Bob example where they greet each other.

Now I am using the following URL with post method:

https://{ledger\_id}.daml.app/v1/exercise/

I added the Authorization in the header as follows:

“Authorization”: “Bearer {jwt token for the party}”

I have the following as the body

{  
“templateId”: “###module:template”,  
“contractId”: “### I am a little bit confused on what to do here. I am looking at the documentation and I am a little doubtful about this.”,  
“choice”: “### choice name”,  
“arguments”: {  
### passed all the  
}  
}

I am getting the “The requested resource could not be found.” error. Can someone please help me on what URL I need to use here.

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**Author:** ![dtanabe](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/dtanabe/32/91_2.png) [@dtanabe](https://forum.canton.network/u/dtanabe)\
**Post date:** [October 10, 2021, 2:13am UTC](https://forum.canton.network/t/postman-request-to-exercise-a-choice-the-requested-resource-could-not-be-found/3285/2 "2021-10-10T02:13:49Z")

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If you go to the Live Data view, you should be able to see a set of existing contracts, and you take one of those contract IDs and put that in the `contractId` field in order to exercise a choice.

If you haven’t created any contracts at all yet, you’ll have to do that (use the `/v1/create` endpoint); then you’ll have a contract ID that you can subsequently exercise choices on.