A sandbox copy of GitHub's remote MCP server. Its repositories are fake, belong to the key's sandbox account, and keep every change.
MCP address: https://github-sandbox.testmachine.ai/mcp, with a bearer key from /settings/tokens.
Tools: get_me, search_repositories, get_file_contents, create_or_update_file, list_issues, issue_read, issue_write, add_issue_comment, list_pull_requests, merge_pull_request