如果我没理解错的话，下面的内容应该能满足你的期望。我添加了几个例子作为调试任务，让你玩结果，并对如何调用你的API做出自己的决定（我自己不能运行一个例子）
以下行动手册

---
- hosts: localhost
  gather_facts: false

  vars:
    # Faking a return from you API based on example json (minified for legibility)
    result: {"items":[{"id":"output-1","name":"Output 1","is_default":true,"type":"testtype","config_yaml":"verification_mode: basic"},{"id":"output-2","name":"Output 2","is_default":false,"type":"testtype","config_yaml":"verification_mode: basic"},{"id":"output-3","name":"Output 3","is_default":false,"type":"testtype","config_yaml":"verification_mode: basic"}]}

    # What to find in haystack
    needle_id: output-1

    # Note: yes this will work with a register as well as long as it exists
    # at time you evaluate the var.
    # Note: having a key called `items` forces us to use the bracket notation
    # to disambiguate from the `items()` python function
    existing_id: "{{ result['items'] | selectattr('id', '==', needle_id) }}"

  tasks:
    - name: play a task if id exists
      debug:
        msg: id exists
      when: existing_id | length > 0

    - name: play a task if id does not exist
      debug:
        msg: id does not exist
      when: existing_id | length == 0

    - name: play single tasks which will be smart
      vars:
        debug_text: "{{ 'does not exist' if existing_id | length == 0 else 'exists' }}"
      debug:
        msg: "id {{ debug_text }}"

    - name: show the found entry (or empty if not)
      debug:
        var: existing_id | first | d({})

提供：

$ ansible-playbook uri.yml 

PLAY [localhost] ***********************************************************************************************************************************************************************************************************************

TASK [play a task if id exists] ********************************************************************************************************************************************************************************************************
ok: [localhost] => {
    "msg": "id exists"
}

TASK [play a task if id does not exist] ************************************************************************************************************************************************************************************************
skipping: [localhost]

TASK [play single tasks which will be smart] *******************************************************************************************************************************************************************************************
ok: [localhost] => {
    "msg": "id exists"
}

TASK [show the found entry (or empty if not)] ******************************************************************************************************************************************************************************************
ok: [localhost] => {
    "existing_id | first | d({})": {
        "config_yaml": "verification_mode: basic",
        "id": "output-1",
        "is_default": true,
        "name": "Output 1",
        "type": "testtype"
    }
}

PLAY RECAP *****************************************************************************************************************************************************************************************************************************
localhost                  : ok=3    changed=0    unreachable=0    failed=0    skipped=1    rescued=0    ignored=0