diff --git a/README.md b/README.md
index a3c723530eb..a7fb2f2b8a8 100644
--- a/README.md
+++ b/README.md
@@ -103,8 +103,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
   * Prediction API
   * Stackdriver Logging API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 // Authenticating on a global basis.
@@ -118,6 +118,9 @@ var gcloud = require('google-cloud')({
 
   // Or the contents of the key file:
   credentials: require('./path/to/keyfile.json')
+
+  // For any APIs that accept an API key:
+  key: '...'
 });
 
 // ...you're good to go! See the next section to get started using the APIs.
diff --git a/packages/bigquery/README.md b/packages/bigquery/README.md
index 63c7f2fe4f1..97f21a7fb5b 100644
--- a/packages/bigquery/README.md
+++ b/packages/bigquery/README.md
@@ -72,8 +72,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * BigQuery API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/bigtable/README.md b/packages/bigtable/README.md
index c3d23acd694..89da4d04e3e 100644
--- a/packages/bigtable/README.md
+++ b/packages/bigtable/README.md
@@ -90,8 +90,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
   * Cloud Bigtable Admin API
   * Cloud Bigtable Table Admin API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/compute/README.md b/packages/compute/README.md
index f3c5b4163fb..c3c12b0e279 100644
--- a/packages/compute/README.md
+++ b/packages/compute/README.md
@@ -78,8 +78,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Google Compute Engine API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/datastore/README.md b/packages/datastore/README.md
index 45de4c2fe39..9e09143964b 100644
--- a/packages/datastore/README.md
+++ b/packages/datastore/README.md
@@ -93,8 +93,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Google Cloud Datastore API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/dns/README.md b/packages/dns/README.md
index 8ee4b2cd22d..b819ea3fd13 100644
--- a/packages/dns/README.md
+++ b/packages/dns/README.md
@@ -76,8 +76,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Google Cloud DNS API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/language/README.md b/packages/language/README.md
index 90b6763ebda..da7d35ddc5f 100644
--- a/packages/language/README.md
+++ b/packages/language/README.md
@@ -101,8 +101,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Google Cloud Natural Language API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/logging/README.md b/packages/logging/README.md
index 4757b2b0d4e..2a937c0bbf8 100644
--- a/packages/logging/README.md
+++ b/packages/logging/README.md
@@ -90,8 +90,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Stackdriver Logging API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/monitoring/README.md b/packages/monitoring/README.md
index 1f4af9006ee..36bb4f93cae 100644
--- a/packages/monitoring/README.md
+++ b/packages/monitoring/README.md
@@ -49,8 +49,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 1. Visit the [Google Developers Console][dev-console].
 2. Create a new project or click on an existing project.
 3. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/prediction/README.md b/packages/prediction/README.md
index 0d95f2dc8cc..878b95e9c93 100644
--- a/packages/prediction/README.md
+++ b/packages/prediction/README.md
@@ -86,8 +86,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Prediction API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/pubsub/README.md b/packages/pubsub/README.md
index b8d8ca252ec..f61b991eb52 100644
--- a/packages/pubsub/README.md
+++ b/packages/pubsub/README.md
@@ -79,8 +79,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Google Cloud Pub/Sub API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/resource/README.md b/packages/resource/README.md
index ce7acc8b11c..a22834e4d3b 100644
--- a/packages/resource/README.md
+++ b/packages/resource/README.md
@@ -72,8 +72,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Google Cloud Resource Manager API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/speech/README.md b/packages/speech/README.md
index 8f47b7efec7..f5816159d02 100644
--- a/packages/speech/README.md
+++ b/packages/speech/README.md
@@ -102,8 +102,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Google Cloud Speech API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/storage/README.md b/packages/storage/README.md
index 08fb071cfbb..89f4988cd21 100644
--- a/packages/storage/README.md
+++ b/packages/storage/README.md
@@ -90,8 +90,8 @@ If you are not running this client on Google Compute Engine, you need a Google D
   * Google Cloud Storage
   * Google Cloud Storage JSON API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
diff --git a/packages/translate/README.md b/packages/translate/README.md
index 04c94742fe7..62eae7cc405 100644
--- a/packages/translate/README.md
+++ b/packages/translate/README.md
@@ -86,8 +86,10 @@ If you are not running this client on Google Compute Engine, you need a Google D
 3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
   * Google Translate API
 4. Navigate to **APIs & auth** >  **Credentials** and then:
-  * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
-  * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  * If you want to use a new service account key, click on **Create credentials** and select **Service account key**. After the account key is created, you will be prompted to download the JSON key file that the library uses to authenticate your requests.
+  * If you want to generate a new service account key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+  *  If you want to use an API key, click on **Create credentials** and select **API key**. After the API key is created, you will see a newly opened modal with the API key in a field named **Your API key** that the library uses to authenticate your requests.
+  * If you want to generate a new API key for an existing API key, click on an existing API key and click **Regenerate key**.
 
 ``` js
 var projectId = process.env.GCLOUD_PROJECT; // E.g. 'grape-spaceship-123'
@@ -100,6 +102,9 @@ var translate = require('@google-cloud/translate')({
 
   // Or the contents of the key file:
   credentials: require('./path/to/keyfile.json')
+
+  // Your API key (if not using a service account JSON file):
+  key: '...'
 });
 
 // ...you're good to go!