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CodeRabbit can perform web queries during reviews and chat to fetch the latest documentation and external content, improving the accuracy and relevance of its output. Web search is enabled by default for all users.

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How it works

When reviewing a pull request or responding in chat, CodeRabbit may perform web queries to include publicly available information — such as current documentation — that may not have been included in the underlying AI model’s training data. You can see when web search was used by checking the Review details section in the walkthrough summary comment (requires review_details: true in your configuration).

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Configuration

Control web search with the knowledge_base.web_search setting in your .coderabbit.yaml file. 
knowledge_base:
  web_search:
    enabled: true  # default
FieldTypeDefaultDescription
knowledge_base.web_search.enabledbooleantrueUse web search to gather additional context.
You may want to disable web search in situations such as:
  • Air-gapped or restricted environments — where outbound network access from the review process is not permitted.
  • Policy requirements — where your organization restricts use of external data sources during code review.
To disable, set enabled to false: 
knowledge_base:
  web_search:
    enabled: false
If you want CodeRabbit to have access to the latest documentation or other up-to-date information, but don’t want to grant full web search access, consider connecting MCP Servers instead.

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What’s next

Knowledge Base

Overview of all knowledge base features

MCP Context

Add external tool integrations as context sources

Configuration Reference

Full reference for knowledge base settings