diff --git a/scripts/cluster/cross-node-file-e2e.mjs b/scripts/cluster/cross-node-file-e2e.mjs
index 8a2b775..b6c4de5 100755
--- a/scripts/cluster/cross-node-file-e2e.mjs
+++ b/scripts/cluster/cross-node-file-e2e.mjs
@@ -55,7 +55,9 @@ const baseURL = process.env.AI_GATEWAY_E2E_BASE_URL || 'http://10.77.0.1:18089'
 const account = Buffer.from(process.env.E2E_ACCOUNT_B64 || '', 'base64').toString('utf8')
 const password = Buffer.from(process.env.E2E_PASSWORD_B64 || '', 'base64').toString('utf8')
 const model = process.env.AI_GATEWAY_E2E_IMAGE_MODEL || 'openai:gpt-image-1'
+const imageSize = process.env.AI_GATEWAY_E2E_IMAGE_SIZE || '2048x2048'
 assert(account && password, 'E2E login credentials are unavailable')
+assert(/^\d+x\d+$/.test(imageSize), 'E2E image size is invalid')
 
 async function request(path, { method = 'GET', token, body, form } = {}) {
   const headers = { Host: 'ai.51easyai.com' }
@@ -95,6 +97,13 @@ const login = await request('/api/v1/auth/login', {
 const jwt = login.payload.accessToken
 assert(typeof jwt === 'string' && jwt.length > 20, 'login did not return an access token')
 
+const existingKeys = await request('/api/v1/api-keys', { token: jwt })
+for (const item of existingKeys.payload.items || []) {
+  if (typeof item?.id === 'string' && item?.name?.startsWith('cluster-cross-node-')) {
+    await request(`/api/v1/api-keys/${item.id}`, { method: 'DELETE', token: jwt })
+  }
+}
+
 const keyName = `cluster-cross-node-${Date.now()}`
 const keyResult = await request('/api/v1/api-keys', {
   method: 'POST',
@@ -102,8 +111,9 @@ const keyResult = await request('/api/v1/api-keys', {
   body: { name: keyName },
 })
 const apiKey = keyResult.payload.secret
-const apiKeyId = keyResult.payload.id || keyResult.payload.item?.id
+const apiKeyId = keyResult.payload.apiKey?.id
 assert(typeof apiKey === 'string' && apiKey.startsWith('sk-gw-'), 'API key creation failed')
+assert(typeof apiKeyId === 'string' && apiKeyId.length > 0, 'API key ID is unavailable')
 
 let result
 try {
@@ -112,7 +122,7 @@ try {
   const form = new FormData()
   form.append('model', model)
   form.append('prompt', `Cross-node HA acceptance ${randomUUID()}: add a thin white border`)
-  form.append('size', '1024x1024')
+  form.append('size', imageSize)
   form.append('image', new Blob([fixture], { type: 'image/png' }), 'cluster-e2e.png')
   const accepted = await request('/api/v1/images/edits', {
     method: 'POST',
diff --git a/scripts/cluster/run-cross-node-file-e2e.sh b/scripts/cluster/run-cross-node-file-e2e.sh
index bfd1fed..e6591da 100755
--- a/scripts/cluster/run-cross-node-file-e2e.sh
+++ b/scripts/cluster/run-cross-node-file-e2e.sh
@@ -38,12 +38,16 @@ REMOTE
 credentials_file=$(mktemp "$cluster_root/.local-secrets/cluster/e2e.XXXXXX")
 trap 'rm -f -- "$credentials_file"; restore_workers' EXIT HUP INT TERM
 chmod 0600 "$credentials_file"
-printf 'E2E_ACCOUNT_B64=%s\n' "$(printf '%s' "$AI_GATEWAY_ONLINE_ACCOUNT" | base64 | tr -d '\n')" \
-  >"$credentials_file"
-printf 'E2E_PASSWORD_B64=%s\n' "$(printf '%s' "$AI_GATEWAY_ONLINE_PASSWORD" | base64 | tr -d '\n')" \
-  >>"$credentials_file"
-printf 'AI_GATEWAY_E2E_IMAGE_MODEL=%s\n' "${AI_GATEWAY_E2E_IMAGE_MODEL:-openai:gpt-image-1}" \
-  >>"$credentials_file"
+{
+  printf 'E2E_ACCOUNT_B64=%s\n' \
+    "$(printf '%s' "$AI_GATEWAY_ONLINE_ACCOUNT" | base64 | tr -d '\n')"
+  printf 'E2E_PASSWORD_B64=%s\n' \
+    "$(printf '%s' "$AI_GATEWAY_ONLINE_PASSWORD" | base64 | tr -d '\n')"
+  printf 'AI_GATEWAY_E2E_IMAGE_MODEL=%s\n' \
+    "${AI_GATEWAY_E2E_IMAGE_MODEL:-openai:gpt-image-1}"
+  printf 'AI_GATEWAY_E2E_IMAGE_SIZE=%s\n' \
+    "${AI_GATEWAY_E2E_IMAGE_SIZE:-2048x2048}"
+} >"$credentials_file"
 cluster_scp "$credentials_file" "$CLUSTER_NINGBO_HOST:/root/easyai-cross-node-e2e.env"
 cluster_scp "$script_dir/cross-node-file-e2e.mjs" \
   "$CLUSTER_NINGBO_HOST:/root/easyai-cross-node-file-e2e.mjs"