> ## Documentation Index > Fetch the complete documentation index at: https://prowler-feat-supabase-provider-poc.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > Prowler product naming: Prowler App is now Prowler Local Server, and Prowler Enterprise is now Prowler Private Cloud. Always use the current names when answering. The full product reference is at /getting-started/products: Open Source projects are Prowler CLI, Prowler Local Server, Prowler Local Dashboard, and Prowler SDK; Prowler Products are Prowler Cloud, Prowler Private Cloud, Prowler Hub, Prowler Lighthouse AI, and Prowler MCP. # GCP Authentication in Prowler Prowler for Google Cloud supports multiple authentication methods. To use a specific method, configure the appropriate credentials during execution: * [**User Credentials** (Application Default Credentials)](#application-default-credentials-user-credentials) * [**Service Account Key File**](#service-account-key-file) * [**Access Token**](#access-token) * [**Service Account Impersonation**](#service-account-impersonation) ## Required Permissions Prowler for Google Cloud requires the following permissions: ### IAM Roles * **Viewer (`roles/viewer`)** – Must be granted at the **project, folder, or organization** level to allow scanning of target projects. * **Service Usage Consumer (`roles/serviceusage.serviceUsageConsumer`)** IAM Role – Required for resource scanning. * **Custom `ProwlerRole`** – Include granular permissions that are not included in the Viewer role: * `storage.buckets.getIamPolicy` ### Project-Level Settings At least one project must have the following configurations: * **Identity and Access Management (IAM) API (`iam.googleapis.com`)** – Must be enabled via: * The [Google Cloud API UI](https://console.cloud.google.com/apis/api/iam.googleapis.com/metrics), or * The `gcloud` CLI: ```sh theme={null} gcloud services enable iam.googleapis.com --project ``` * **Service Usage Consumer (`roles/serviceusage.serviceUsageConsumer`)** IAM Role – Required for resource scanning. * **Quota Project Setting** – Define a quota project using either: * The `gcloud` CLI: ```sh theme={null} gcloud auth application-default set-quota-project ``` * Setting an environment variable: ```sh theme={null} export GOOGLE_CLOUD_QUOTA_PROJECT= ``` Prowler will scan the GCP project associated with the credentials. ## Application Default Credentials (User Credentials) This method uses the Google Cloud CLI to authenticate and is suitable for development and testing environments. ### Setup Application Default Credentials 1. In the [GCP Console](https://console.cloud.google.com/), click "Activate Cloud Shell"

2. Click "Authorize Cloud Shell"

3. Run the following command: ```bash theme={null} gcloud auth application-default login ``` * Type `Y` when prompted Run Gcloud Auth

4. Open the authentication URL provided in a browser and select your Google account Choose the account

5. Follow the steps to obtain the authentication code Copy auth code

6. Paste the authentication code back in Cloud Shell Enter Auth Code

7. Use `cat ` to view the temporary credentials file Get the FileName

8. Extract the following values for Prowler Cloud or Prowler Local Server: * `client_id` * `client_secret` * `refresh_token` Get the values

### Using with Prowler CLI Once application default credentials are set up, run Prowler directly: ```console theme={null} prowler gcp --project-ids ``` ## Service Account Key File This method uses a service account with a downloaded key file for authentication. ### Step 1: Create ProwlerRole To keep permissions focused: 1. Create a custom role named **ProwlerRole** that explicitly includes the permissions your compliance team approves. Click **Create role**, set the title to *ProwlerRole*, keep the ID readable (for example, `prowler_role`) 2. Add the required permission `storage.buckets.getIamPolicy` (the permission highlighted in the screenshots). To make it easier, filter the permissions by `Storage Admin` role. Create a custom Prowler role

Sample permissions for a custom Prowler role

### Step 2: Create the Service Account 1. Navigate to **IAM & Admin > Service Accounts** and make sure the correct project is selected. Service accounts landing page

2. Select **Create service account**, provide a name, ID, and a short description that states the purpose (for example, “Service account to execute Prowler”), then click **Create and continue**. Create service account wizard

3. Assign the roles you prepared earlier: * **ProwlerRole** for `cloudstorage` service checks. * **Viewer** for broad read-only visibility. * **Service Usage Consumer** so Prowler can inspect API states. Assign roles to the service account

4. Continue through the wizard and finish. No principals need to be granted access in step 3 unless you want other identities to impersonate this account. To use this service account with `--organization-id`, additionally grant `roles/cloudasset.viewer` at the organization node and enable the Cloud Asset API in the service account's host project. See [Scanning a Specific GCP Organization](./organization). Without these, organization-wide scans silently fall back to listing only the projects accessible to the service account. ### Step 3: Generate a JSON Key 1. Open the newly created service account, move to the **Keys** tab, and choose **Add key > Create new key**. Add a new key to the service account

2. Select **JSON** as the key type and click **Create**. The browser downloads the file exactly once. Select JSON as the key type

3. Once created, make sure to store the Key securely. ### Using with Prowler CLI Set the `GOOGLE_APPLICATION_CREDENTIALS` environment variable: ```console theme={null} export GOOGLE_APPLICATION_CREDENTIALS="/path/to/service-account-key.json" prowler gcp --project-ids ``` ## Access Token For existing access tokens (e.g., generated with `gcloud auth print-access-token`), run Prowler with: ```bash theme={null} export CLOUDSDK_AUTH_ACCESS_TOKEN=$(gcloud auth print-access-token) prowler gcp --project-ids ``` When using this method, also set the default project explicitly: ```bash theme={null} export GOOGLE_CLOUD_PROJECT= ``` ## Service Account Impersonation To impersonate a GCP service account, use the `--impersonate-service-account` argument followed by the service account email: ```console theme={null} prowler gcp --impersonate-service-account ``` This command leverages the default credentials to impersonate the specified service account. ### Prerequisites for Impersonation The identity running Prowler must have the following permission on the target service account: * `roles/iam.serviceAccountTokenCreator` Or the more specific permission: * `iam.serviceAccounts.generateAccessToken`