Google Cloud APIs Go Client Library

go get


Google Cloud for Go

Build Status GoDoc

import ""

NOTE: These packages are under development, and may occasionally make backwards-incompatible changes.

NOTE: Github repo is a mirror of

Go packages for Google Cloud Platform services. Supported APIs are:

Google API Status Package
Datastore beta
Storage beta
Pub/Sub experimental
BigTable stable
BigQuery experimental
Logging experimental

Experimental status: the API is still being actively developed. As a result, it might change in backward-incompatible ways and is not recommended for production use.

Beta status: the API is largely complete, but still has outstanding features and bugs to be addressed. There may be minor backwards-incompatible changes where necessary.

Stable status: the API is mature and ready for production use. We will continue addressing bugs and feature requests.

Documentation and examples are available at


By default, each API will use Google Application Default Credentials for authorization credentials used in calling the API endpoints. This will allow your application to run in many environments without requiring explicit configuration.

Manually-configured authorization can be achieved using the package to create an oauth2.TokenSource. This token source can be passed to the NewClient function for the relevant API using a cloud.WithTokenSource option.

Google Cloud Datastore

Google Cloud Datastore (docs) is a fully- managed, schemaless database for storing non-relational data. Cloud Datastore automatically scales with your users and supports ACID transactions, high availability of reads and writes, strong consistency for reads and ancestor queries, and eventual consistency for all other queries.

Follow the activation instructions to use the Google Cloud Datastore API with your project.

First create a datastore.Client to use throughout your application:

client, err := datastore.NewClient(ctx, "my-project-id")
if err != nil {

Then use that client to interact with the API:

type Post struct {
    Title       string
    Body        string `datastore:",noindex"`
    PublishedAt time.Time
keys := []*datastore.Key{
    datastore.NewKey(ctx, "Post", "post1", 0, nil),
    datastore.NewKey(ctx, "Post", "post2", 0, nil),
posts := []*Post{
    {Title: "Post 1", Body: "...", PublishedAt: time.Now()},
    {Title: "Post 2", Body: "...", PublishedAt: time.Now()},
if _, err := client.PutMulti(ctx, keys, posts); err != nil {

Google Cloud Storage

Google Cloud Storage (docs) allows you to store data on Google infrastructure with very high reliability, performance and availability, and can be used to distribute large data objects to users via direct download.

First create a storage.Client to use throughout your application:

client, err := storage.NewClient(ctx)
if err != nil {
// Read the object1 from bucket.
rc, err := client.Bucket("bucket").Object("object1").NewReader(ctx)
if err != nil {
defer rc.Close()
body, err := ioutil.ReadAll(rc)
if err != nil {

Google Cloud Pub/Sub

Google Cloud Pub/Sub (docs) allows you to connect your services with reliable, many-to-many, asynchronous messaging hosted on Google's infrastructure. Cloud Pub/Sub automatically scales as you need it and provides a foundation for building your own robust, global services.

// Publish "hello world" on topic1.
msgIDs, err := pubsub.Publish(ctx, "topic1", &pubsub.Message{
    Data: []byte("hello world"),
if err != nil {
// Pull messages via subscription1.
msgs, err := pubsub.Pull(ctx, "subscription1", 1)
if err != nil {


Contributions are welcome. Please, see the CONTRIBUTING document for details. We're using Gerrit for our code reviews. Please don't open pull requests against this repo, new pull requests will be automatically closed.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms. See Contributor Code of Conduct for more information.