Managing Kaiten via MCP Server

Quick start

All Kaiten tools are deferred. Load them before use:

ToolSearch query: "+kaiten list spaces"
ToolSearch query: "select:mcp__kaiten__kaiten_get_current_user"

Tool naming pattern: mcp__kaiten__kaiten_<action> (e.g., mcp__kaiten__kaiten_list_cards).

Always begin a session with kaiten_get_current_user to get the user's ID, name, and permissions.

Core concepts

Board hierarchy: Company → Space → Board → Column/Lane → Card

Sidebar tree: Spaces, documents, and document groups form a unified tree via parent_entity_uid. Any entity can nest under another (cross-nesting allowed). Use kaiten_list_children and kaiten_get_tree to navigate.

Card types: Epic, Story, Task (or custom). Set via type_id.

Card states: 1 = Queue, 2 = In Progress, 3 = Done

Column types: 1 = Queue, 2 = In Progress, 3 = Done

Card conditions: 1 = Active, 2 = Archived, 3 = Deleted

Timeline/Gantt: Use planned_start and planned_end fields (ISO 8601) on cards.

Size estimation: size_text field accepts S, M, L, XL.

Essential workflows

Creating a full board structure

1. Create or select a space (kaiten_create_space or kaiten_list_spaces)
2. Create board in space (kaiten_create_board with space_id)
3. Create columns (kaiten_create_column with board_id, type 1/2/3)
4. Create at least one lane (kaiten_create_lane with board_id)
5. Now cards can be placed on the board

Creating cards with timeline

kaiten_create_card:
  title, board_id, column_id, lane_id, type_id, owner_id,
  planned_start: "2026-03-01T00:00:00.000Z",
  planned_end: "2026-03-31T00:00:00.000Z",
  size_text: "L"

Parent-child relationships (decomposition)

Parent-child links are NOT set during card creation. Use a separate call:

kaiten_add_card_child:
  card_id: <parent_card_id>
  child_card_id: <child_card_id>

For three-level decomposition (Epic → Story → Task):

• Link each Story as child of its Epic
• Link each Task as child of its Story

Creating documents

Use the text parameter for one-step creation with markdown content, or data for raw ProseMirror JSON. See PROSEMIRROR.md for advanced format details.

One-step (recommended):

kaiten_create_document: title, text="## Heading\n\nContent with **bold**"

Two-step (for complex content):

1. Create document group (optional folder):

   kaiten_create_document_group: title

1. Create document:

   kaiten_create_document: title, parent_entity_uid

1. Update with content:

   kaiten_update_document: document_uid, data (ProseMirror JSON object)

Notes:

• sort_order is auto-generated if not provided
• bullet_list and ordered_list nodes are automatically converted to safe paragraphs
• text param supports: # headings, **bold**, *italic*, ~~strike~~, ` code , > quotes, ---` rules

Navigating the entity tree

Use tree tools to discover what's nested where in the sidebar:

kaiten_list_children                         → root-level entities
kaiten_list_children: parent_entity_uid=X    → children of entity X
kaiten_get_tree                              → full nested tree
kaiten_get_tree: root_uid=X, depth=2         → subtree with depth limit

Handling large responses

Use compact=true parameter for list operations to reduce response size:

kaiten_list_cards: board_id=123, compact=true
kaiten_list_users: compact=true
kaiten_list_spaces: compact=true

What compact mode does:

• Removes base64-encoded avatar_url fields (can be 10-50KB each)
• Simplifies user objects (owner, responsible, author) to {id, full_name}
• Simplifies user lists (members, responsibles) to [{id, full_name}, ...]

Default limit: All list operations default to 50 items when limit is not specified. Use limit parameter to override.

Bulk operations

For creating 10+ cards or links, use background agents to avoid context bloat. Pass the agent a flat list of parameters and let it call tools sequentially.

Gotchas

• kaiten_list_cards accepts space_id to filter by space
• Rate limit: 4.5 req/s. The MCP server handles retries automatically
• Card state is derived from column type, not set directly
• archive_after_days must be at least -1; -1 disables auto-archive. Lowering a

column's value may immediately archive cards whose time in that column already exceeds the new threshold, so confirm the intended effect before updating it

• Default limit is 50 for all list operations

Kanban metrics

For Kanban metrics collection (Lead Time, Cycle Time, Throughput, WIP, Flow Efficiency), see the kaiten-metrics skill. It covers efficient bulk data fetching, server-side chart computation, and all metric formulas using card fields directly.

Reference

Full tool list by category: See TOOLS_REFERENCE.md ProseMirror document format: See PROSEMIRROR.md Complex workflow examples: See WORKFLOWS.md Kanban metrics collection: See kaiten-metrics skill