diff --git a/guardrails_utilities/shell_utils/enable-serviceusage/README.md b/guardrails_utilities/shell_utils/enable-serviceusage/README.md
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+# Enable Service Usage API across an organization
+
+Lists every project under a GCP organization and enables the Service Usage API
+(`serviceusage.googleapis.com`) on each one.
+
+Runs in **dry-run mode by default** — it only lists the projects and prints what
+it _would_ do. Pass `--dry-run false` to actually enable the service.
+
+## Prerequisites
+
+To run the script, you must have:
+
+- [Google Cloud CLI (`gcloud`)](https://cloud.google.com/sdk/docs/install)
+- [jq](https://stedolan.github.io/jq/download/)
+- An authenticated gcloud session: `gcloud auth login`
+- IAM permission to list projects under the organization and to enable services
+  on each project (`roles/serviceusage.serviceUsageAdmin` or equivalent, plus
+  `roles/browser` / `resourcemanager.projects.list` at the org level).
+
+## Executing the script
+
+1. Ensure that you have execute privileges:
+
+   ```shell
+   chmod +x enable-serviceusage.sh
+   ```
+
+2. Authenticate and run:
+
+   ```shell
+   gcloud auth login
+   ./enable-serviceusage.sh --org-id 123456789012
+   ```
+
+### Synopsis
+
+```shell
+./enable-serviceusage.sh --org-id <ORG_ID> [options]
+```
+
+### Options
+
+--org-id (Required)
+
+> [String] The numeric GCP organization ID whose projects will be processed.
+
+--service (Optional)
+
+> [String] Comma-separated list of one or more services to enable.
+> Defaults to `serviceusage.googleapis.com`.
+> Example: `serviceusage.googleapis.com,orgpolicy.googleapis.com`.
+
+--dry-run (Optional)
+
+> [String] When `false` the service is enabled on each project; when `true` the
+> script only lists the projects and what it would do.
+> Defaults to `true`.
+
+--skip-system (Optional)
+
+> [String] When `true` projects whose lifecycle state is not `ACTIVE` (e.g.
+> `DELETE_REQUESTED`) are skipped.
+> Defaults to `true`.
+
+--help
+
+> Lists all the options and their usages.
+
+### Example usage
+
+#### Example 1: List the projects that would be affected (dry-run)
+
+```shell
+./enable-serviceusage.sh --org-id 123456789012
+```
+
+#### Example 2: Enable the Service Usage API on every project
+
+```shell
+./enable-serviceusage.sh --org-id 123456789012 --dry-run false
+```
+
+#### Example 3: Enable a different service
+
+```shell
+./enable-serviceusage.sh --org-id 123456789012 --service compute.googleapis.com --dry-run false
+```
+
+#### Example 4: Enable multiple services at once
+
+```shell
+./enable-serviceusage.sh --org-id 123456789012 \
+  --service serviceusage.googleapis.com,orgpolicy.googleapis.com --dry-run false
+```
+
+## Notes
+
+- The script discovers projects at **any depth** in the org. It walks the
+  organization's folder tree (folders only, via `gcloud resource-manager folders
+  list`) to build the full set of parent containers, then filters the project
+  list locally by parent id. This covers folder-nested projects that a plain
+  `parent.id=<org>` filter would miss, and avoids the Cloud Asset API (which
+  requires a usable quota project).
+- It only sees projects the **authenticated account has permission to list**.
+  Projects in the org that the caller cannot access are silently absent.
+- Enabling a service is idempotent — re-running on a project that already has the
+  API enabled is a no-op.
diff --git a/guardrails_utilities/shell_utils/enable-serviceusage/enable-serviceusage.sh b/guardrails_utilities/shell_utils/enable-serviceusage/enable-serviceusage.sh
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+++ b/guardrails_utilities/shell_utils/enable-serviceusage/enable-serviceusage.sh
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+#!/bin/bash
+#
+# Enable the Service Usage API (serviceusage.googleapis.com) across every project
+# in a GCP organization.
+#
+# Dry-run by default: lists the projects and prints what it would do. Pass
+# `--dry-run false` to actually enable the API in each project.
+
+function displayHelp {
+    echo "Enables serviceusage.googleapis.com across all projects in a GCP organization."
+    echo ""
+    echo "Mandatory arguments"
+    echo "  --org-id: the numeric GCP organization ID whose projects will be processed"
+    echo "Optional arguments"
+    echo "  --service: comma-separated service(s) to enable (serviceusage.googleapis.com)"
+    echo "  --dry-run: when 'true' only lists projects, when 'false' enables the service (true)"
+    echo "  --skip-system: skip projects whose lifecycle state is not ACTIVE (true)"
+    echo "  --help: lists all the options and their usages"
+    echo ""
+    echo "Remarks"
+    echo "  Requires an authenticated gcloud session ('gcloud auth login') with permission"
+    echo "  to list projects under the organization and to enable services on each project"
+    echo "  (roles/serviceusage.serviceUsageAdmin or equivalent)."
+}
+
+# Collect the organization ID plus every folder ID beneath it (recursively),
+# one per line on stdout. Projects can be nested in folders to any depth, so a
+# simple `parent.id=<org>` filter is not enough — we must know every parent
+# container in the org's hierarchy. This walks folders only (far fewer than
+# projects) and needs no Cloud Asset API.
+function collectParentIds {
+    local ORG_ID=$1
+
+    echo "${ORG_ID}"
+
+    local QUEUE
+    QUEUE=$(gcloud resource-manager folders list --organization=${ORG_ID} \
+        --format="value(name)" 2>/dev/null)
+
+    while [[ -n ${QUEUE} ]]
+    do
+        local NEXT=""
+        local FOLDER
+        for FOLDER in ${QUEUE}
+        do
+            echo "${FOLDER}"
+            local SUB
+            SUB=$(gcloud resource-manager folders list --folder=${FOLDER} \
+                --format="value(name)" 2>/dev/null)
+            if [[ -n ${SUB} ]]
+            then
+                NEXT="${NEXT} ${SUB}"
+            fi
+        done
+        QUEUE="${NEXT}"
+    done
+}
+
+function main {
+    local SERVICE="serviceusage.googleapis.com"
+    local DRY_RUN=true
+    local SKIP_NON_ACTIVE=true
+    local ORG_ID=""
+
+    START=$(date +%s)
+
+    # Parse the command line into values required by script
+    while (( "$#" )); do
+        case "$1" in
+            -o|--org-id)
+                if [[ -n "$2" ]] && [[ ${2:0:1} != "-" ]]
+                then
+                    ORG_ID=$2
+                    shift 2
+                else
+                    echo "[ERROR] Argument for $1 is missing" >&2
+                    displayHelp
+                    exit 1
+                fi
+            ;;
+            -s|--service)
+                if [[ -n "$2" ]] && [[ ${2:0:1} != "-" ]]
+                then
+                    SERVICE=$2
+                    shift 2
+                else
+                    echo "[ERROR] Argument for $1 is missing" >&2
+                    displayHelp
+                    exit 1
+                fi
+            ;;
+            -d|--dry-run)
+                if [[ -n "$2" ]] && [[ ${2:0:1} != "-" ]]
+                then
+                    if [[ ${2} = "false" ]]
+                    then
+                        DRY_RUN=false
+                    fi
+                    shift 2
+                else
+                    echo "[ERROR] Argument for $1 is missing" >&2
+                    displayHelp
+                    exit 1
+                fi
+            ;;
+            --skip-system)
+                if [[ -n "$2" ]] && [[ ${2:0:1} != "-" ]]
+                then
+                    if [[ ${2} = "false" ]]
+                    then
+                        SKIP_NON_ACTIVE=false
+                    fi
+                    shift 2
+                else
+                    echo "[ERROR] Argument for $1 is missing" >&2
+                    displayHelp
+                    exit 1
+                fi
+            ;;
+            --help)
+                displayHelp
+                exit 0
+            ;;
+            -*|--*=) # unsupported flags
+                echo "[ERROR] Unsupported flag $1" >&2
+                displayHelp
+                exit 1
+            ;;
+            *) # unsupported positional arguments
+                echo "[ERROR] Error: Unsupported argument $1" >&2
+                displayHelp
+                exit 1
+            ;;
+        esac
+    done
+
+    if [[ -z ${ORG_ID} ]]
+    then
+        echo '[ERROR] Expected argument `--org-id`' >&2
+        displayHelp
+        exit 2
+    fi
+
+    EXPECTED_COMMANDS=( gcloud jq )
+
+    for EXPECTED_COMMAND in "${EXPECTED_COMMANDS[@]}"
+    do
+        if ! command -v ${EXPECTED_COMMAND} &> /dev/null
+        then
+            echo "[ERROR] Please install ${EXPECTED_COMMAND} in order for this script to work" >&2
+            exit 1
+        fi
+    done
+
+    # Confirm there is an active, non-expired gcloud credential before we start.
+    if ! gcloud auth list --filter=status:ACTIVE --format="value(account)" 2>/dev/null | grep -q .
+    then
+        echo "[ERROR] No active gcloud account. Run 'gcloud auth login' first." >&2
+        exit 3
+    fi
+
+    echo "[INFO] Mapping the folder hierarchy under organization ${ORG_ID}"
+
+    # Build the set of every parent container (org + all nested folders) so we
+    # can match projects at any depth, not just direct org children.
+    local PARENT_IDS
+    PARENT_IDS=$(collectParentIds "${ORG_ID}")
+    local PARENT_COUNT
+    PARENT_COUNT=$(echo "${PARENT_IDS}" | grep -c .)
+    echo "[INFO] Found ${PARENT_COUNT} container(s) (organization + folders)"
+
+    echo "[INFO] Listing projects under organization ${ORG_ID}"
+
+    # List every project the caller can see (with its direct parent id), then
+    # keep only those whose parent is the org or one of its folders. One project
+    # list call + a local join avoids a slow per-folder query and the Cloud Asset
+    # API (which needs a usable quota project).
+    local PROJECTS_TSV
+    PROJECTS_TSV=$(echo "${PARENT_IDS}" | awk '
+        NR==FNR { if ($0 != "") ids[$0]=1; next }
+        ($2 in ids) { print $1"\t"$3 }
+    ' - <(gcloud projects list --format="value(projectId,parent.id,lifecycleState)" 2>/dev/null))
+
+    if [[ -z ${PROJECTS_TSV} ]]
+    then
+        echo "[WARN] No projects found under organization ${ORG_ID}." >&2
+        echo "[WARN] Check that you have resourcemanager.projects.list permission and" >&2
+        echo "[WARN] that the organization ID is correct." >&2
+        exit 0
+    fi
+
+    # --service may be a comma-separated list; gcloud services enable accepts
+    # multiple services as separate arguments, so turn commas into spaces.
+    local SERVICES="${SERVICE//,/ }"
+
+    local TOTAL=0
+    local SUCCEEDED=0
+    local FAILED=0
+    local SKIPPED=0
+
+    while IFS=$'\t' read -r PROJECT_ID LIFECYCLE
+    do
+        [[ -z ${PROJECT_ID} ]] && continue
+        let "TOTAL += 1"
+
+        if [[ ${SKIP_NON_ACTIVE} == true ]] && [[ ${LIFECYCLE} != "ACTIVE" ]]
+        then
+            echo "[INFO] Skipping ${PROJECT_ID} (lifecycle: ${LIFECYCLE})"
+            let "SKIPPED += 1"
+            continue
+        fi
+
+        if [[ ${DRY_RUN} == true ]]
+        then
+            echo "[DRY-RUN] Would enable ${SERVICE} on ${PROJECT_ID}"
+            continue
+        fi
+
+        echo "[INFO] Enabling ${SERVICE} on ${PROJECT_ID}"
+        if gcloud services enable ${SERVICES} --project="${PROJECT_ID}" 2>/tmp/enable_err_$$
+        then
+            echo "[INFO]    Enabled on ${PROJECT_ID}"
+            let "SUCCEEDED += 1"
+        else
+            echo "[ERROR]   Failed on ${PROJECT_ID}: $(cat /tmp/enable_err_$$)" >&2
+            let "FAILED += 1"
+        fi
+        rm -f /tmp/enable_err_$$
+    done <<< "${PROJECTS_TSV}"
+
+    echo ""
+    echo "[INFO] Total projects processed: ${TOTAL}"
+    echo "[INFO]    Skipped (non-active):  ${SKIPPED}"
+    if [[ ${DRY_RUN} == false ]]
+    then
+        echo "[INFO]    Enabled:               ${SUCCEEDED}"
+        echo "[INFO]    Failed:                ${FAILED}"
+    else
+        echo "[INFO] Dry-run mode: no services were enabled. Re-run with '--dry-run false' to apply."
+    fi
+
+    END=$(date +%s)
+    RUNTIME=$((END - START))
+    echo "[INFO] Total time taken ${RUNTIME} second(s)"
+
+    if [[ ${FAILED} -gt 0 ]]
+    then
+        exit 4
+    fi
+}
+
+main "$@"