highlight github mcp

Local 2025-09-01 00:35:13 0
Developer Tools @highlight-ing/highlight-github-mcp

Extracts diffs from GitHub Pull Requests, allowing users to retrieve and analyze changes between branches in a repository.

The GitHub MCP server provides functionality to extract diffs from Pull Requests.

Available Tools

get_diff_pr

Retrieves the diff content from a GitHub Pull Request.

Parameters: - owner: Repository owner/organization name - repo: Repository name - pr_number: Pull Request number

Returns: Object containing: - content: String containing the PR diff

Authentication

Required: Set the GitHub Personal Access Token as an environment variable: 

export GITHUB_TOKEN=<your-github-token>

The token needs at least repo scope permissions to access private repositories. For public repositories, a token with public_repo scope is sufficient.

Error Handling

The server implements standard error handling: - Missing/invalid token returns ErrorCode.AuthenticationError - Invalid repository details return ErrorCode.InvalidParams - Non-existent PR returns ErrorCode.NotFound - Failed diff fetches return formatted error messages - Graceful shutdown on SIGINT

Technical Details

  • Built using the Highlight AI MCP SDK
  • Uses GitHub REST API v3
  • Input validation via Zod
  • Runs as a stdio-based MCP server
  • Supports Node.js >=18.0.0

Limitations

  • Rate limits apply based on GitHub API restrictions
  • Large diffs may be truncated according to GitHub API limits
  • Token requires appropriate repository access permissions