Gremlin Spoke

  • Release version: Australia
  • Updated March 12, 2026
  • 3 minutes to read
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    Summary of Gremlin Spoke

    The Gremlin Spoke enables ServiceNow customers to simulate outages and manage attacks directly from their ServiceNow instance by integrating with the Gremlin platform. This integration automates attack creation, retrieval, scheduling, and halting, thereby enhancing incident and chaos engineering workflows within ServiceNow.

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    Important: Starting with the Yokohama release, the Gremlin Spoke is being prepared for future deprecation. It will no longer be activated on new instances but will continue to be supported. The Spoke Generator offers the latest experience for these capabilities.

    This spoke requires an Integration Hub subscription and depends on specific ServiceNow plugins to function correctly.

    Key Features

    • Attack Management Actions: Automate creation, lookup, execution retrieval, detail retrieval, and halting of attacks on the Gremlin platform.
    • Attack Schedule Management Actions: Create, delete, retrieve details, and list active attack schedules synchronized with the ServiceNow instance timezone.
    • Configurable Data Retrieval: Actions retrieving attack data can be configured to return up to 10 MB of data, with error handling if exceeded, ensuring control over response sizes.
    • Connection and Credential Management: Supports the use of aliases for connections and credentials to simplify management across multiple environments and avoid updating actions when credentials change.

    Requirements and Dependencies

    • An Integration Hub subscription is mandatory to use this spoke.
    • Admin access to the Gremlin dashboard and a designated team in Gremlin with corresponding Team ID and API Key for authentication.
    • Necessary dependent ServiceNow plugins must be installed, including IntegrationHub Runtime, Complex Object, Flow Designer - Dynamic Inputs, and IntegrationHub Action Step - REST. Some plugins may require additional licenses.
    • Compatibility is primarily with Gremlin version 1.0 but may extend to later versions.

    Practical Considerations

    • Users must ensure they have the appropriate Gremlin license features to access corresponding spoke actions in ServiceNow.
    • Boolean input arguments to Gremlin may be interpreted differently by the platform, so users should verify behavior accordingly.
    • When configuring the spoke, setting up connection and credential aliases is recommended to streamline integration management.

    What Customers Can Expect

    By integrating the Gremlin Spoke into their ServiceNow instance, customers can seamlessly orchestrate chaos engineering experiments and manage attack simulations from within their ITSM workflows. This improves reliability testing and incident management without switching platforms. However, customers should plan for the eventual transition away from this spoke due to its upcoming deprecation starting in the Yokohama release.

    Simulate outages and manage attacks using Gremlin instance from your ServiceNow instance.

    Important:

    Starting with the Yokohama release, Gremlin Spoke is being prepared for future deprecation. It will be hidden and no longer activated on new instances but will continue to be supported. Spoke Generator provides the latest experience for this functionality.

    For details, see the Deprecation Process [KB0867184] article in the Now Support knowledge base.

    Request apps on the Store

    Visit the ServiceNow Store to view all the available apps, and for information about submitting requests to the store. For cumulative release notes information for all released apps, see the ServiceNow Store version history release notes.

    Integration Hub subscription

    This spoke requires an Integration Hub subscription. For more information, see Legal schedules - IntegrationHub overview.

    Spoke version

    Gremlin spoke v1.0.3 is the latest version.

    Supported versions

    This spoke was built for Gremlin version v1, but may be compatible with later versions.

    Spoke requirements

    • Set up clients as per your requirement.
    • Admin access to the Gremlin dashboard.
    • Team in your Gremlin account for integration with ServiceNow instance. For more information about creating teams, see Teams.
    • Team ID and API Key of the team. Copy and record these value for later use. For more information about accessing these values, see the Signature-based Authentication section.

    Spoke dependencies

    If you’re having trouble installing the app, ensure that these dependent plugins are installed:
    • ServiceNow IntegrationHub Runtime (com.glide.hub.integration.runtime)
    • Complex Object (com.glide.cobject)
    • ServiceNow Flow Designer - Dynamic Inputs (com.glide.hub.dynamic_inputs)
    • ServiceNow IntegrationHub Action Step - REST (com.glide.hub.action_step.rest)
    Note:
    Some of these plugins are licensable features and require appropriate licenses, if used outside the spoke implementation.

    Spoke actions

    The Gremlin spoke provides actions to automate Gremlin tasks when events occurs in your ServiceNow instance. Available actions include:

    Category Action Description
    Attack Management Create Attack Creates an attack on the Gremlin platform.
    Get Attack Details Retrieves details about an attack.
    Get Attack Executions Retrieves a list of executions associated with an attack.
    Halt All Attacks Idempotently halts all active attacks across the Gremlin platform.
    Look up Attacks Lists all attacks on the Gremlin platform.
    Note:
    • By default, this action can retrieve data up to 5 MB. You can configure the glide.pf.rest.response_payload_max_size property to retrieve data up to 10 MB. If the data in the response is more 10 MB, an error is displayed.
    • As data up to 10 MB only can be retrieved, you can also specify number of records that should be retrieved in the input field, Number of records to return.
    Attack Schedule Management Create Attack Schedule Creates an attack schedule on the Gremlin platform.
    Delete Attack Schedule Deletes the specified attach schedule.
    Get Attack Schedule Details Retrieves details about the specified attack schedule.
    Look up Active Attack Schedules Lists all the attack schedules on the Gremlin platform.
    Note:
    • Time zone that is considered in the spoke actions, is same as the time zone of your ServiceNow instance.
    • Based on your Gremlin license, if you don't have access to certain Gremlin functionality, you can't use the associated spoke actions in your ServiceNow instance as well.
    • For some arguments that take True or False as input, the actual value that the Gremlin platform considers, might be different from the value you have provided.

    Connection and credential alias requirements

    Integration Hub uses aliases to manage connection and credential information, and OAuth credentials. Using an alias eliminates the need to configure multiple credentials and connection information profiles when using multiple environments. If the connection or credential information changes, you don't need to update any actions that use the connection.

    For information about setting up the spoke, see Create Connection and Credential record for the Gremlin spoke.