> ## Documentation Index > Fetch the complete documentation index at: https://docs.tylon.app/llms.txt > Use this file to discover all available pages before exploring further. # Tylon: Git's control panel > Tylon is where work lives and where Git happens. A column is a real branch, moving a card is a real merge. These docs cover the public API and the MCP server. Tylon is a board whose columns are real branches. Moving a card cuts a branch, opens a pull request, or merges one — so the board cannot say "done" while the repository disagrees. What a card is, what a column really is, and what happens when you move one. Ten minutes that make the rest of these docs read differently. ## Reaching a board from outside Two doors. They reach the same boards and enforce the same permissions — what differs is who is behind the call. A credential, a `Bearer` header, and JSON. For a deploy script, a status page, a spreadsheet — anything that has no person sitting at it. For an editor or an agent working as **you**. It signs in the way you do, reads what you may read, and answers in sentences rather than in JSON. ## Which one you want | | Public API | MCP server | | ------------- | --------------------------------------------- | -------------------------- | | Authenticates | a machine | a person | | Credential | client id and secret | OAuth 2.0 with PKCE | | Answers in | JSON, with HTTP status codes | prose, for a model to read | | Writes | with the `write` scope and an idempotency key | yes | | Set up in | **Settings → API credentials** | your editor, in one URL | If a person is present and could click **Approve**, use MCP. If nothing is present but a cron entry, use the API.