List all spaces in the Kaiten workspace.

Get a single space by ID.

Create a new space.

Update a space's title or access mode.

Delete a space by ID. Irreversible — confirm with the user.

List boards of a space (pass space_id), or attempt to list all boards.

Get a single board by ID with its columns and lanes.

Create a new board in a space.

Update a board's title or description.

Delete a board. Irreversible — confirm with the user.

List all columns (stages) of a Kaiten board.

Create a new column on a board.

Update a column's title, type, position, or WIP limit.

Delete a column. Irreversible — confirm with the user.

List all lanes (swimlanes/rows) of a Kaiten board.

Create a new lane (swimlane) on a board.

Update a lane's title, position, or WIP limit.

Delete a lane. Irreversible — confirm with the user.

List cards with optional filters by board, column, and full-text query. Returns a compact projection.

Get a single card by ID with all details (full JSON).

Create a new card on a board in a specific column (and optional lane).

Update card fields: title, description, owner, due date, ASAP flag, size.

Move a card to a different column and/or lane.

Delete a card by ID. This is irreversible — confirm with the user first.

Get the movement history (board/column/lane changes) of a card.

Add a comment to a Kaiten card.

List comments on a card.

Edit the text of an existing card comment.

Delete a card comment by ID. Irreversible.

List members assigned to a card.

Add a user as a member of a card.

Change a card member's role (type 2 = responsible).

Remove a member from a card.

List tags attached to a card.

Attach a tag (by name) to a card; creates the tag if new.

Remove a tag from a card by tag ID.

List child cards of a parent card.

Add a child card to a parent card.

Detach a child card from a parent card.

List external links attached to a card.

Attach an external link (URL) to a card.

Update an external link's URL or description.

Remove an external link from a card.

List blockers on a card.

Block a card with a reason or by a blocking card.

Update a card blocker's reason or blocking card.

Release (delete) a card blocker.

Add a checklist to a card.

Get a card checklist with its items.

Rename or reorder a card checklist.

Delete a checklist from a card. Irreversible.

Add an item to a card checklist.

Update a checklist item (toggle done, edit text, set due/responsible).

Delete a checklist item.

List all tags in the Kaiten workspace.

List all users in the Kaiten workspace.

Get the user the API token belongs to (identifies 'me').

List card types defined in the workspace (id, name, color, letter).

List sprints, optionally filtered by active status.

Get a sprint summary (cards, totals) by sprint ID.

List company custom properties (read-only).

Get a single custom property by ID (read-only).

List the select/catalog values of a custom property (read-only).