diff --git a/.gitignore b/.gitignore
index fb9c5ab6a..d01b955bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -95,3 +95,4 @@ tests/test-team/playwright/.cache/
 .github/copilot-instructions.md
 
 test-runs
+seed-data.json
diff --git a/scripts/sandbox_auth.sh b/scripts/sandbox_auth.sh
index 14e0b301c..ccfaf8caa 100755
--- a/scripts/sandbox_auth.sh
+++ b/scripts/sandbox_auth.sh
@@ -4,6 +4,8 @@ set -euo pipefail
 
 root_dir=$(git rev-parse --show-toplevel)
 
+source "$root_dir/scripts/seed/utils.sh"
+
 # expect 3 argument to the script
 if [ $# -ne 2 ]; then
   echo 1>&2 "$0: expected 2 arguments, received $#"
@@ -68,11 +70,7 @@ if [[ "$get_user_command_exit_code" -ne 0 ]]; then
   if aws ssm get-parameter --name "$client_config_param_name" --with-decryption >/dev/null 2>&1; then
     echo "Client config parameter already exists: $client_config_param_name"
   else
-    aws ssm put-parameter \
-      --name "$client_config_param_name" \
-      --value "$client_config_param_value" \
-      --type String
-
+    put_client_parameter "${client_config_param_name}" "${client_config_param_value}"
     echo "Created client config parameter: $client_config_param_name"
   fi
 
diff --git a/scripts/seed/seed.sh b/scripts/seed/seed.sh
new file mode 100755
index 000000000..7becda88c
--- /dev/null
+++ b/scripts/seed/seed.sh
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+set -euo pipefail
+
+root_dir=$(git rev-parse --show-toplevel)
+
+source "$root_dir/scripts/seed/utils.sh"
+
+if [ $# -ne 1 ]; then
+  echo 1>&2 "$0: expected 1 arguments, received $#"
+  exit 2
+fi
+
+environment=$1
+
+data_file="$root_dir/seed-data.json"
+
+if [ ! -f "${data_file}" ]; then
+  echo 1>&2 "Error: Seed data file not found at ${data_file}"
+  exit 2
+fi
+
+csi="nhs-notify-${environment}-app"
+
+client_parameter_namespace="/${csi}/clients"
+
+clients=$(jq -c '.clients[]?' "${data_file}")
+
+while IFS= read -r client; do
+  if [[ -n "${client}" ]]; then
+    client_id=$(jq -r '.id' <<< "${client}")
+    client_name=$(jq -r '.name' <<< "${client}")
+
+    echo
+    echo "---"
+    echo "Processing client (${client_name} - ${client_id})"
+
+    echo "Creating client SSM parameter"
+    put_client_parameter "${client_parameter_namespace}/${client_id}" "${client}"
+    echo "Created client SSM parameter"
+    echo
+    echo "Processed client: (${client_name} - ${client_id})"
+  fi
+done <<< "${clients}"
+
+echo
+echo "---"
+echo "Successfully seeded all demo clients"
diff --git a/scripts/seed/utils.sh b/scripts/seed/utils.sh
new file mode 100644
index 000000000..74ee24082
--- /dev/null
+++ b/scripts/seed/utils.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+function put_client_parameter() {
+  local parameter_name=$1
+  local client=$2
+
+  local campaign_ids=$(jq '.campaignIds' <<< "${client}")
+  local features=$(jq '.features' <<< "${client}")
+  local parameter_value=$(jq <<< "{
+    \"campaignIds\": ${campaign_ids},
+    \"features\": ${features}
+  }")
+
+  aws ssm put-parameter \
+    --name "${parameter_name}" \
+    --value "${parameter_value}" \
+    --type String \
+    --overwrite > /dev/null
+}