Release notes

This page provides information about updates to the Developer Knowledge API and Developer Knowledge MCP server. Check this page for announcements about new or updated features, bug fixes, and known issues.

October 8, 2026

• Client libraries for the Developer Knowledge API are available for C#, Go, Java, Node.js, PHP, Python, and Ruby languages.

October 1, 2026

• The following domain is now included in the corpus:

  • knowledge.workspace.google.com

  See the full list of supported domains in the Corpus Reference.

September 25, 2026

• The retrieving-developer-knowledge agent skill is now available in the google/skills repository, which helps AI coding assistants choose the right Developer Knowledge MCP server tool and fall back to the REST API when MCP is unavailable. For more information, see Use the Developer Knowledge agent skill.

September 22, 2026

• gcloud developer-knowledge commands are generally available (GA) in the gcloud CLI.
  • gcloud developer-knowledge answer-query: Generate answers to queries drawn from developer documentation.
  • gcloud developer-knowledge documents describe: Retrieve document metadata and content views.
  • gcloud developer-knowledge documents search-chunks: Search relevant document chunks for a given query.

September 9, 2026

• gcloud beta developer-knowledge commands are available in the 'beta' component of the gcloud CLI.
  • gcloud beta developer-knowledge answer-query: Generate answers to queries drawn from developer documentation.
  • gcloud beta developer-knowledge documents describe: Retrieve document metadata and content views.
  • gcloud beta developer-knowledge documents search-chunks: Search relevant document chunks for a given query.

August 27, 2026

• Filtering is now generally available (GA) in the v1 API for AnswerQueryRequest. For more information, see the reference for AnswerQueryRequest.filter.

August 25, 2026

• The following domain is now included in the corpus:

  • genkit.dev

  See the full list of supported domains in the Corpus Reference.

August 21, 2026

• DocumentChunk messages in the v1 API now include a relevance_score field in the range [0.0, 1.0], indicating the chunk's relevance to AnswerQuery or SearchDocumentChunks queries.

August 18, 2026

• (v1alpha) gcloud alpha developer-knowledge commands are available in the 'alpha' component of the gcloud CLI.
  • gcloud alpha developer-knowledge answer-query: Generate answers to queries drawn from developer documentation.
  • gcloud alpha developer-knowledge documents describe: Retrieve document metadata and content views.
  • gcloud alpha developer-knowledge documents search-chunks: Search relevant document chunks for a given query.

August 7, 2026

• (v1alpha) DocumentChunk messages now include a relevance_score field in the range [0.0, 1.0], indicating the chunk's relevance to AnswerQuery or SearchDocumentChunks queries.
• (v1alpha) AnswerQueryRequest now supports filtering search results using the filter field. For more information, see the reference for AnswerQueryRequest.filter.

July 27, 2026

• The Developer Knowledge API now supports the https://www.googleapis.com/auth/developerprofiles.readonly OAuth scope.

July 17, 2026

• The AnswerQuery endpoint is now Generally Available (GA). For more information, see Generate answers from documentation.

July 9, 2026

• The maximum allowed page_size for SearchDocumentChunks has been increased from 20 to 100.
• For SearchDocumentChunks, page_size values greater than 100 are now coerced to 100 rather than returning an INVALID_ARGUMENT error.

July 2, 2026

• Document messages now include a content_length_bytes field, which denotes the length of the content field in bytes.

June 9, 2026

• AnswerQuery now uses the gemini-3-flash-preview model.

June 1, 2026

• AnswerQuery responses now include references and citations for the provided answer.

  For more information, see Generate answers from documentation.

May 20, 2026

• The following domains are now included in the corpus:

  • cloud.google.com
  • dart.dev
  • docs.flutter.dev
  • mapsplatform.google.com

  See the full list of supported domains in the Corpus Reference.

April 20, 2026

• The Developer Knowledge API now supports the AnswerQuery method, which lets you generate answers to queries drawn from the Developer Knowledge API corpus.

  For more information, see Generate answers from documentation.

April 16, 2026

• The Developer Knowledge API and Developer Knowledge MCP server are now generally available (GA). Use the API and MCP server to give AI-powered development tools the ability to search and retrieve Google's official developer documentation.

April 14, 2026

• The following domains are now included in the corpus:

  • adk.dev
  • antigravity.google
  • geminicli.com
  • go.dev

  See the full list of supported domains in the Corpus Reference.

April 9, 2026

• SearchDocumentChunks now supports filtering on the Document data_source, update_time, and uri fields. See Search and retrieve documents and the reference for SearchDocumentChunks.filter for more information.

April 2, 2026

• Document messages now include a data_source field, which denotes the source of the content that is being returned.
• The Developer Knowledge API now supports the DocumentView enum, allowing you to request document metadata without retrieving the full document content. A view field will now be populated on Document messages.
• Document messages now have an update_time field, indicating when the document content or metadata last changed.
• DocumentChunk messages now have a Document field, containing metadata about the document.

February 28, 2026

• Document messages now include title and description fields, denoting the title and description of the document.

March 15, 2026

• Fixed an issue where Document.uri values lacked a scheme. They now include a https:// prefix.

March 8, 2026

• The MCP Tools get_document and batch_get_documents have been removed. They are replaced by a new get_documents MCP Tool.

February 18, 2026

• After March 17, 2026, when you enable the Developer Knowledge API, the Developer Knowledge MCP server is automatically enabled.

February 4, 2026

• The Developer Knowledge API and Developer Knowledge MCP server are now in Public Preview. Use the API and MCP server to give AI-powered development tools the ability to search and retrieve Google's official developer documentation.