diff --git a/.github/request-model-versions.sh b/.github/request-model-versions.sh
new file mode 100755
index 000000000..cfd8c164c
--- /dev/null
+++ b/.github/request-model-versions.sh
@@ -0,0 +1,198 @@
+#! /usr/bin/env bash
+
+set -e
+
+# Google Cloud Workflow execution script
+# Usage: ./wait_for_country_versions.sh -b <bucket_name> -us <us_version> -uk <uk_version> [-t timeout] [-i interval]
+
+usage() {
+    echo "Usage: $0 -b <bucket_name> -us <us_version> -uk <uk_version> [-t timeout] [-i interval]"
+    echo ""
+    echo "Required flags:"
+    echo "  -b  bucket_name      - GCS bucket name"
+    echo "  -us  us_version       - US package version"
+    echo "  -uk  uk_version       - UK package version"
+    echo ""
+    echo "Optional flags:"
+    echo "  -t  timeout_seconds  - Maximum wait time in seconds (default: 300)"
+    echo "  -i  check_interval   - Check interval in seconds (default: 10)"
+    echo "  -h  help            - Show this help message"
+    echo ""
+    echo "Example:"
+    echo "  $0 -b my-bucket -us v1.2.3 -uk v1.2.4"
+    echo "  $0 -b my-bucket -us v1.2.3 -uk v1.2.4 -t 600 -i 15"
+    exit 1
+}
+
+# Initialize variables
+BUCKET_NAME=""
+US_VERSION=""
+UK_VERSION=""
+TIMEOUT_SECONDS="300"
+CHECK_INTERVAL="10"
+
+# Parse command line arguments
+while [ $# -gt 0 ]; do
+    case "$1" in
+        -b)
+            if [ -z "$2" ]; then
+                echo "Error: -b requires a bucket name"
+                exit 1
+            fi
+            BUCKET_NAME="$2"
+            shift 2
+            ;;
+        -us)
+            if [ -z "$2" ]; then
+                echo "Error: -us requires a US version"
+                exit 1
+            fi
+            US_VERSION="$2"
+            shift 2
+            ;;
+        -uk)
+            if [ -z "$2" ]; then
+                echo "Error: -uk requires a UK version"
+                exit 1
+            fi
+            UK_VERSION="$2"
+            shift 2
+            ;;
+        -t)
+            if [ -z "$2" ]; then
+                echo "Error: -t requires a timeout value"
+                exit 1
+            fi
+            TIMEOUT_SECONDS="$2"
+            shift 2
+            ;;
+        -i)
+            if [ -z "$2" ]; then
+                echo "Error: -i requires an interval value"
+                exit 1
+            fi
+            CHECK_INTERVAL="$2"
+            shift 2
+            ;;
+        -h)
+            usage
+            ;;
+        *)
+            echo "Error: Unknown option $1"
+            usage
+            ;;
+    esac
+done
+
+# Validate required arguments
+if [ -z "$BUCKET_NAME" ] || [ -z "$US_VERSION" ] || [ -z "$UK_VERSION" ]; then
+    echo "Error: Missing required arguments"
+    echo "bucket_name (-b), us_version (-us), and uk_version (-uk) are required"
+    usage
+fi
+
+# Validate numeric arguments
+if ! [[ "$TIMEOUT_SECONDS" =~ ^[0-9]+$ ]] || ! [[ "$CHECK_INTERVAL" =~ ^[0-9]+$ ]]; then
+    echo "Error: timeout_seconds and check_interval must be positive integers"
+    exit 1
+fi
+
+# Configuration
+PROJECT_ID="${GOOGLE_CLOUD_PROJECT:-$(gcloud config get-value project 2>/dev/null)}"
+WORKFLOW_LOCATION="${WORKFLOW_LOCATION:-us-central1}"
+WORKFLOW_NAME="wait-for-country-packages"
+
+if [ -z "$PROJECT_ID" ]; then
+    echo "Error: Could not determine project ID. Set GOOGLE_CLOUD_PROJECT environment variable."
+    exit 1
+fi
+
+echo "Starting workflow execution..."
+echo "Project: $PROJECT_ID"
+echo "Location: $WORKFLOW_LOCATION"
+echo "Workflow: $WORKFLOW_NAME"
+echo "Bucket: $BUCKET_NAME"
+echo "US Version: $US_VERSION"
+echo "UK Version: $UK_VERSION"
+echo "Timeout: ${TIMEOUT_SECONDS}s"
+echo "Check Interval: ${CHECK_INTERVAL}s"
+
+# Build input JSON
+INPUT_JSON=$(cat <<EOF
+{
+  "bucket_name": "$BUCKET_NAME",
+  "us_country_package_version": "$US_VERSION",
+  "uk_country_package_version": "$UK_VERSION",
+  "timeout_seconds": $TIMEOUT_SECONDS,
+  "check_interval": $CHECK_INTERVAL
+}
+EOF
+)
+
+echo "Input: $INPUT_JSON"
+
+# Execute workflow
+echo "Executing workflow..."
+EXECUTION_RESULT=$(gcloud workflows execute "$WORKFLOW_NAME" \
+    --location="$WORKFLOW_LOCATION" \
+    --data="$INPUT_JSON" \
+    --format="json")
+
+# Extract execution name
+EXECUTION_NAME=$(echo "$EXECUTION_RESULT" | jq -r '.name')
+
+if [ -z "$EXECUTION_NAME" ] || [ "$EXECUTION_NAME" = "null" ]; then
+    echo "Failed to start workflow execution"
+    echo "$EXECUTION_RESULT"
+    exit 1
+fi
+
+echo "Execution started: $EXECUTION_NAME"
+
+# Monitor execution state
+START_TIME=$(date +%s)
+echo "Monitoring execution state..."
+
+while true; do
+    # Get current execution state
+    EXECUTION_STATUS=$(gcloud workflows executions wait "$EXECUTION_NAME" \
+        --location="$WORKFLOW_LOCATION" \
+        --format="json")
+    
+    STATE=$(echo "$EXECUTION_STATUS" | jq -r '.state')
+    
+    echo "Current state: $STATE"
+    
+    # Check if execution is complete
+    if [ "$STATE" = "SUCCEEDED" ]; then
+        echo "SUCCESS: Workflow completed successfully"
+        RESULT=$(echo "$EXECUTION_STATUS" | jq -r '.result // empty')
+        if [ -n "$RESULT" ] && [ "$RESULT" != "null" ]; then
+            echo "Result: $RESULT"
+        fi
+        exit 0
+    elif [ "$STATE" = "FAILED" ]; then
+        echo "FAILED: Workflow execution failed"
+        ERROR=$(echo "$EXECUTION_STATUS" | jq -r '.error // empty')
+        if [ -n "$ERROR" ] && [ "$ERROR" != "null" ]; then
+            echo "Error: $ERROR"
+        fi
+        exit 1
+    elif [ "$STATE" = "CANCELLED" ]; then
+        echo "CANCELLED: Workflow execution was cancelled"
+        exit 1
+    fi
+    
+    # Check monitoring timeout
+    CURRENT_TIME=$(date +%s)
+    ELAPSED=$((CURRENT_TIME - START_TIME))
+    
+    if [ $ELAPSED -ge $((TIMEOUT_SECONDS + 60)) ]; then
+        echo "TIMEOUT: Monitoring timeout exceeded"
+        echo "Workflow may still be running. Check Google Cloud Console for status."
+        exit 1
+    fi
+    
+    # Wait before next check
+    sleep "$CHECK_INTERVAL"
+done
\ No newline at end of file
diff --git a/changelog_entry.yaml b/changelog_entry.yaml
index e69de29bb..d9d2699c8 100644
--- a/changelog_entry.yaml
+++ b/changelog_entry.yaml
@@ -0,0 +1,4 @@
+- bump: patch
+  changes:
+    added:
+    - Bash script to check for model versions within simulation API; not yet integrated into GitHub Actions.
\ No newline at end of file