Build a Free AI Code-Review Bot for GitHub PRs Using MonkeyCode

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Developers can set up an automated code-review pipeline for GitHub pull requests at no cost using MonkeyCode, an open-source AI coding assistant that offers free models and a free hosted server. A GitHub Action detects each pull request, extracts the code diff, and sends it to a MonkeyCode API endpoint, which returns review comments posted directly on the PR — all within about a minute. The setup requires only two repository secrets and a YAML workflow file, with no credit card, trial period, or billing form involved. Users can choose between MonkeyCode's hosted free server, suitable for open-source or experimental projects, or a self-hosted server that keeps code diffs within a private network. The article was published as part of MonkeyCode's product outreach, and the self-hosted option requires roughly 30 minutes of setup compared to five minutes for the hosted version.

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