webservice create issue jira.

[Sergio _]

I need to create an issue in jira from another application.

Using a webservice feature the app have a form with field to fill. 
I don't know how to pass for example  the projectid.

{"projects": 
      {"id": "10204",
}
}

into a simple field with two textboxes

[Alexey Matveev]

Hello, 

You need to use Jira REST API to create an issue in jira. Kindly have a look at the following doc. You can find an example there:

https://developer.atlassian.com/cloud/jira/platform/rest/#api-api-2-issue-post