Monthly Archive

September 2026 API Changes

Historical archive of all discovery document diffs, schema evolutions, and breaking change alerts recorded during September 2026.

64Total Updates
33Breaking Alerts
22High Impact
Showing 64 updates in September 2026

September 2026 Updates Stream

Cloud Billing Budgets`billingbudgets.v1`•
Breaking

Introducing Spend Caps for Billing Budgets

Cloud Billing Budgets now supports a new `spendCap` feature, allowing you to define and enforce spending limits directly within your budgets. This introduces a new `SpendCap` schema with `inputState` for control and `outputState` for monitoring.

Cloud Storage`storage.v1`•
Breaking

New Object Context API & Breaking Changes Clarified

Cloud Storage introduces a new `objects.viewFullContext` method to retrieve detailed object context, defined by the new `ObjectFullContext` schema. While the diff reports breaking changes, these apply to the required parameters of this *new* method, not existing API calls.

Methods:
BigQuery`bigquery.v2`•
Breaking

BigQuery: Secure Query Context, Native Parquet Geography Export, and a Breaking Change

BigQuery introduces a new `secureContext` for passing sensitive, context-specific information to queries, accessible via a new SQL function. Additionally, you can now export Parquet data with native Geography types. Heads up: `JobStatistics2.referencedLogicalViews` is now read-only, which may break existing integrations.

AlloyDB`alloydb.v1beta`•
Medium Impact

AlloyDB: `trackActiveQueryPlan` Deprecated

The `trackActiveQueryPlan` property within AlloyDB's `ObservabilityInstanceConfig` schema has been deprecated. Developers should plan to migrate away from using this feature.

AlloyDB`alloydb.v1alpha`•
Medium Impact

AlloyDB: Observability Config Field Deprecated

The `trackActiveQueryPlan` field within the `ObservabilityInstanceConfig` schema has been marked as deprecated. Developers should update their configurations to avoid using this field.

Methods:
AlloyDB`alloydb.v1`•
High Impact

AlloyDB Enhances IAM Group Authentication

AlloyDB now supports new `userType` enum values for IAM group-based authentication, enabling more flexible and granular control over database access for groups, users, and service accounts.

Methods:
YouTube Data API`youtube.v3`•
Breaking

YouTube Data API: `postId` Removed, `favorite`/`like` Activities Gone, `subscription` Restored

The YouTube Data API v3 has undergone significant breaking changes. The `postId` parameter and properties have been removed from comments and comment threads. Additionally, `favorite` and `like` activity types and their associated schemas are no longer available. On a positive note, the `subscription` activity type is no longer deprecated.

Methods:
Google Drive API`drive.v3`•
Released

Drive API clarifies concurrent permission warnings

The Google Drive API's documentation for `permissions.create`, `delete`, and `update` methods has been updated. The warning about concurrent permission modifications is now more explicit, clarifying its scope.

Methods:
Google Drive API`drive.v2`•
Released

Permission Concurrency Warning Clarified

The Google Drive API's permission methods (`delete`, `insert`, `patch`, `update`) now feature updated descriptions that clarify the scope of concurrent modification warnings.

Methods:
Dataplex`dataplex.v1`•
Released Breaking

Major Breaking Changes: Data Taxonomy & Attributes Removed

The Dataplex API has undergone significant breaking changes, with the complete removal of the Data Taxonomy and Data Attribute Binding feature sets. Developers using these features must update their integrations immediately. A new IAM role configuration for Data Product Access Groups has been introduced.

Methods:
Android Publisher`androidpublisher.v3`•
Medium Impact

Increased Deobfuscation File Upload Limit

The Android Publisher API now supports larger deobfuscation file uploads, with the maximum size increased from 1.6 GB to 2.0 GB. This update benefits developers with larger apps.

Methods:
Cloud Pub/Sub`pubsub.v1beta2`•
Medium Impact

Client Telemetry for Pub/Sub Publish Operations

Cloud Pub/Sub introduces new schemas, `PublishOperation` and `PubsubClientTelemetry`, to provide more detailed client-side telemetry for publish operations, including hedging attempts and client-side start times.

Cloud Pub/Sub`pubsub.v1beta1a`•
Medium Impact

Pub/Sub Adds Client Telemetry for Publish Operations

The Pub/Sub API now includes new schemas for client-side telemetry, `PubsubClientTelemetry` and `PublishOperation`. These additions provide insights into publish operations, such as hedging attempts and client-side publish start times, to aid in debugging and performance analysis.

Dataproc Metastore`metastore.v1beta`•
Breaking

Lakehouse Proxy Config Introduced (Breaking)

Dataproc Metastore now exposes `LakehouseProxyConfig` for managing phased migrations to Lakehouse Iceberg REST Catalogs. This new configuration and its properties are read-only, which is a breaking change for any clients attempting to write to them.

Dataproc Metastore`metastore.v1`•
Breaking

Lakehouse Proxy Routing & Read-Only Config

Dataproc Metastore introduces new Lakehouse proxy routing capabilities for phased migrations to Iceberg REST Catalogs. The new `LakehouseProxyConfig` and its properties are now officially read-only, which is a breaking change if you were previously attempting to configure them.

Android Publisher`androidpublisher.v3`•
Medium Impact

New `updateId` for Hosted App Responses

The `UpdateAppStoreHostedAppResponse` now includes an `updateId` to uniquely identify and track specific versions of hosted app updates, enabling correlation with publishing signals.

Analytics Hub`analyticshub.v1`•
High Impact

Analytics Hub: Custom Bigtable Row Keys & Column Mappings

Analytics Hub now provides advanced customization for Pub/Sub to Bigtable ingestion. Developers can define custom row keys using delimited fields or structured schemas, and control how JSON message fields map to Bigtable column families, offering greater flexibility for data modeling.

Vertex AI`aiplatform.v1beta1`•
Breaking

Agent Patching goes Async and Video 'Pro Edit' arrives

Vertex AI v1beta1 shifts Agent updates to Long Running Operations and introduces experimental 'Pro Edit' video capabilities. New observability features and Reasoning Engine garbage collection also debut.

Methods:
Analytics Hub`analyticshub.v1`•
Medium Impact

CMEK support for Query Templates

Analytics Hub now supports Customer-Managed Encryption Keys (CMEK) for Query Templates, allowing developers to encrypt template definitions using their own KMS keys.

Dataproc Metastore`metastore.v1beta`•
Breaking

MigrationSummary endTime is now read-only

A breaking change in the Metastore v1beta API marks the MigrationSummary endTime field as read-only. The createTime field description has also been updated to clarify its role in the migration process.

Dataform`dataform.v1beta1`•
Released (7d lead)Breaking

Dataform adds BigQuery Unit Tests and End-User Auth

Dataform now supports native BigQuery unit testing and granular end-user authentication for workflow invocations. Note that several metadata fields for unit tests and auth are now strictly read-only.

Vertex AI`aiplatform.v1beta1`•
Breaking

Vertex AI: Breaking Parameter Changes & Auth Scope Shift

Vertex AI v1beta1 enforces mandatory name and parent parameters and transitions many resource fields to read-only status. Additionally, the API is shifting its primary OAuth scope to the service-specific aiplatform scope.

Vertex AI`aiplatform.v1`•
Breaking

Vertex AI shifts to granular OAuth scopes

Vertex AI is promoting the specific `aiplatform` OAuth scope as the primary authorization method across most resources, while finalizing the enforcement of the `name` parameter as strictly required.