Call Now Assist Skill step

  • Release version: Zurich
  • Updated July 31, 2025
  • 4 minutes to read
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    Summary of Call Now Assist Skill step

    The Call Now Assist Skill step enables ServiceNow customers to run published Now Assist skills directly from a Workflow Studio action step. This functionality allows you to integrate intelligent language model (LLM) capabilities into custom workflows by configuring skill inputs and outputs seamlessly within action steps.

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    Key Features

    • Integration with Now Assist Skill Kit: Requires the Now Assist Skill Kit to use predefined skill configurations for invoking LLM-powered skills.
    • Role-based Access: Available for users with the actiondesigner role and delegated development roles enabling Workflow Studio custom action creation.
    • Dynamic Inputs: Supports providing inputs as static values or dynamic pills from the data panel, ensuring flexible data mapping to skill input parameters.
    • Comprehensive Outputs: Outputs include error messages, LLM provider name, generated response text, JSON results, call status, and detailed runtime step status information.
    • Error Handling: Options to continue workflow execution or trigger error evaluation based on step success or failure, with standardized step status codes (0 = success, 1 = error).

    Using the Step with an Example: Flow Summarization Skill

    The step can be configured to call specific Now Assist skills such as the Flow Summarization skill, which summarizes the purpose and logic of a flow or subflow. For this example:

    • Inputs include the Sys ID of the flow component and the type of component (e.g., flow, subflow).
    • A JSON payload maps action inputs to the skill’s expected inputs.
    • Outputs generated include a textual summary describing the flow’s operation, a detailed JSON result, and a success status.

    This example shows how you can leverage the skill’s response output as input for further workflow logic, enabling automation informed by AI-generated summaries.

    Practical Benefits for ServiceNow Customers

    • Embed AI-powered assistance directly within workflows to enhance automation and decision-making.
    • Reduce manual effort by generating context-aware summaries or responses from Now Assist skills.
    • Maintain robust workflow error handling with standardized step status codes and messages.
    • Customize skill invocation dynamically through configurable inputs and JSON payloads.

    By using the Call Now Assist Skill step, you can extend the power of Now Assist LLM skills within your existing ServiceNow workflows, improving efficiency and insight through AI-driven interactions.

    Run a published Now Assist skill from an action. Configure the Now Assist skill inputs and skill outputs from the step inputs and step outputs.

    Roles and availability

    Available as an Workflow Studio action step. Users with the action_designer role can create a custom action with one or more action steps.

    Now Assist Skill Kit requirements
    This step requires the Now Assist Skill Kit. For more information, see Exploring Now Assist Skill Kit.
    Role requirements
    This step requires roles granted by delegated development or assigned to the user. For more information, see User access to Workflow Studio flows.

    Inputs

    Provide a value for each input that your action needs. To add dynamic values, you can also drag and drop pills from the Data panel or select them from the pill picker.

    Skill Config
    Data type: Reference

    Reference to a Now Assist Skill Config [sn_nowassist_skill_config] record. The payload is generated based on the Skill Config you select.

    Payload
    Data type: String

    JSON-formatted string containing the payload to send to the Now Assist skill and the OneExtend Framework for processing.

    If this step fails
    Data type: Choice

    Option to continue running the next step or go to error evaluation. To use the step status code or message for a custom action error condition, see Action error evaluation.

    Outputs

    These outputs appear in the Data panel. You can use them as inputs elsewhere in your action.

    Error
    Data type: String

    Error message produced by the skill. This output is empty when the skill successfully runs the Now Assist skill request.

    Provider
    Name of the LLM provider that fulfilled the Now Assist skill request.
    Response
    Text response generated by the LLM such as a summary or a reply to a conversation.
    Result
    JSON-formatted string containing the results generated by the LLM to the input payload.
    Status
    Status of the call to the provider.
    Step Status
    Data type: Object

    Object data pill containing runtime details about the step. Each step in an action returns a Step Status.

    Step Status Code
    Data type: Integer
    Integer data pill indicating whether the step produced an error. A step returns a value of 1 when it produces an error for any reason. For example, a step can produce an error if it is missing mandatory input data or returns output in the wrong data type. A step returns a value of 0 when it runs successfully. You cannot customize these codes.
    • Success [0]: The step succeeded.
    • Error [1]: The step produced an error.
    Step Status Message
    Data type: String

    String data pill containing the error message produced by the step or system operation. You cannot customize the step status message.

    Call the Flow Summarization skill

    Action that uses the Call Now Assist Skill step for the Flow Summarization skill.

    This example action calls the Flow Summarize skill, which provides a text summary of what a flow or subflow does. The Flow Summarization skill has two skill inputs.
    • asset_sys_id. This input contains the Sys ID of the component to be summarized.
    • asset_type. This input contains the type of component to summarize.
    To support the two skill inputs, this example action has two matching action inputs.
    • Flow to summarize. This input contains the Sys ID of the component to be summarized.
    • Type. This input contains the type of component to summarize such as flow, subflow, or action.
    Note:
    An action can't have an input with the name sys_id, because that name is a reserved word.

    We can test this action by providing these example input values.

    Skill Config
    This example uses the Flow Summarization Now Assist Skill Config record.
    Payload
    This example uses a JSON object to map action input values to skill values. In this example, we provide the Sys ID of the Change - Normal - Authorize flow and the type of flow.

    Example execution details of the call flow summarization skill

    Here are the example output values produced by the Flow summarization skill.

    Error output
    This example doesn't produce an error output.
    Provider output
    This example uses the Now LLM provider.
    Response output

    This example uses the Flow Summarization skill to generate a summary for the Change - Normal - Authorize flow. Typically, you would use this Response output as an input for another action or flow logic.

    This flow, named "Change - Normal - Authorize", is designed to process a Change Request that uses the Normal Change Model and is in the state of Authorize, while ensuring it is not on hold.

    The flow begins by checking if the assignment group manager has already approved the change request. If not, it applies a Change Approval Policy, specifically for risk approvals.

    The flow then evaluates whether the approval process was skipped, rejected, or approved. If skipped, it does nothing. If rejected, it sends an email notification to relevant parties. If approved, it updates the change request record to mark it as approved.

    In parallel, the flow waits for the change request to be on hold or inactive, and then disregards any change request approvals. It also evaluates the change model again.

    The flow ends after completing these tasks.

    Result output
    This example returns a JSON object containing the both the response and the flow elements used to generate the response.
    Status output
    This example returns a success output value.