Laver MCPサーバー

@laver/mcp

An MCP server for Laver. Gives an agent tools to read and drive kanban boards, tickets and the workspace wiki.

Every tool is a thin call to the same public REST API the web app uses. There is no local state, no cache, and no second implementation of anything — if Laver refuses a write, the refusal comes back verbatim, because an agent can act on "409, re-read and retry" and cannot act on "something went wrong".

Setup

Create a workspace-scoped API key in Laver under Admin → API keys. It acts as the person who created it, so it can do exactly what they can do and nothing more, and it can be revoked without touching their account.

{
  "mcpServers": {
    "laver": {
      "command": "npx",
      "args": ["-y", "@laver/mcp"],
      "env": { "LAVER_API_KEY": "your key here" }
    }
  }
}

LAVER_API_URL overrides the API host; it defaults to https://api.laver.app. LAVER_API_KEY_FILE is an alternative to LAVER_API_KEY: a path to either a file containing nothing but the key, or a .env-style file with a LAVER_API_KEY=… line among others (an assignment line wins; quotes and an export prefix are both fine). That is how the .mcp.json in this repo registers the server without a secret in a tracked file.

A file with neither — no assignment line, and more than one token in it — yields no key at all, and you get the "key is not set" error. It used to send the whole file as the token, which is fine for a file holding one secret and is a leak for anything else.

LAVER_API_URL must be https, except for localhost.

Working in this repo

.mcp.json at the repo root registers this server for anyone who opens the project, reading the key from the gitignored .env. Nothing to export.

It runs the published package, npx -y @laver/mcp, rather than the mcp/server.js beside it. That is deliberate: pointing it at the local file meant everyone here ran the one code path no user takes, and that is precisely how 0.1.0 shipped with an entry point that never connected its transport when started through bin — which is the only way a real client starts it. Running what we publish means we meet what users meet.

If you are editing this server, that same choice will fool you: your changes do nothing until they are published. Point the client at the working copy while you work on it —

{ "command": "node", "args": ["mcp/server.js"] }

— and put it back before you commit. npm run check and frontend/tests/check-mcp-bin-entrypoint.mjs both run against the working copy regardless, so the tests never depend on a publish.

A client only connects to MCP servers at startup. claude mcp add while a session is already running does not retrofit the tools into that session — the tool list was built before the server existed. Start a new session (or reconnect from the client's MCP panel) and the tools appear.

Tools

Reading

Tool	What it gives you
list_workspaces	Where to start when you have no uuids
list_boards	The boards in a workspace
get_board	A board with its status columns, labels, members and tickets
list_tickets	Tickets on a board, filterable, paged — updated_since is how you follow a board
list_workspace_tickets	Triage across every board at once — overdue, unassigned, or free text
get_ticket	One ticket in full, its subtasks, including its version
get_ticket_comments	Comments and activity history
get_ticket_flow	How long the ticket has spent in each column
list_custom_fields	A board's custom field definitions — the uuids update_ticket writes against
list_labels	Every label in the workspace, not only the ones already used on one board
search	Boards, tickets, wiki pages and comments across a whole workspace at once

list_workspace_tickets is the stand-up read: it needs no board_uuid, and it is the only thing here that answers "what is late" and "what does nobody own" without walking every board. It is deliberately the small sibling of list_tickets — one page, 50 by default and 200 at most, no cursor — so narrow it rather than paging it.

get_ticket_flow derives its numbers from the moves already in a ticket's history. Read visits rather than the by_status totals if you are adding several tickets up: tickets worked in one batch overlap, and their totals do not. gaps says when the history and the ticket's current column disagree, which makes the totals a floor rather than a measurement.

To follow a board, call list_tickets again with updated_since set to the server_time the previous call returned; you get back the tickets that changed and nothing else. There is no tool for the server-sent event stream at GET /boards/:uuid/events — a tool call is one request and one answer, and a stream that never ends is neither.

Asking for less. A tool result is charged against the model's context, and three of these calls are the ones you cannot route around: a status_uuid or a label_uuid comes from get_board, and a page_uuid comes from get_wiki_tree. On a busy board they were 154 kB, 119 kB and 180 kB. Each now takes a parameter that narrows the reply, and every one of them is opt-in — a call that passes none of them is unchanged.

Call	Gives you	Measured
get_board(include_tasks: false)	the structure alone — statuses, labels, fields	155 kB → 17 kB
get_wiki_tree(depth: 1)	the top level, nothing nested under it	119 kB → 1.8 kB
get_wiki_tree(parent_page_uuid: …)	one page and everything beneath it	119 kB → 9.8 kB
list_tickets(include_descriptions: false)	titles and uuids without the bodies	167 kB → 45 kB

Reach for get_board(include_tasks: false) whenever you called it for a uuid rather than for the tickets, and list_tickets when you want the tickets — that one takes status and limit as well.

Writing

Tool	Notes
create_ticket	status takes the column name, or pass status_uuid; markdown in description is parsed
update_ticket	Needs version; markdown in description is parsed; custom_fields is keyed by field uuid and replaces the whole object
move_ticket	Needs version, and a column — neither column is a 400
comment_on_ticket	Markdown in body is parsed; no version, so it cannot 409
update_comment	Your own comments only; replaces the whole body and is marked as edited
delete_comment	Your own comments only; to the trash, and nothing here restores one
mark_comments_read	Clears this ticket's unread badge for the user the key acts as
add_subtask	One checklist item, appended — plain text, not markdown
update_subtask	Tick it off (is_done), rename it, or move it up the list
delete_subtask	Not recoverable — a checklist item has no trash
archive_ticket	To the trash — recoverable for 30 days
delete_ticket	Destroys one already in the trash — permanent
create_board	Optionally from a template — crm or sales-leads
link_tickets	"this before that" — direction is blocks or blocked_by
unlink_tickets	From either end, and removes every kind of link on the pair

Comments are not versioned, so none of the three comment writes takes a version and none of them can 409 — the last edit wins. Only the author may edit or delete one, and somebody else's is a 404 indistinguishable from a comment that does not exist, so these never report who wrote what. get_ticket_comments deliberately marks nothing read; mark_comments_read is the only call that does, and it marks up to the newest comment that exists at that moment rather than subscribing.

Subtasks are the checklist on a ticket — a progress count on the card, and where acceptance criteria belong when they are meant to be ticked off one at a time. get_ticket returns the items themselves, so there is no separate list tool.

Board structure

Tool	Notes
create_status	A new column, appended to the right-hand end
update_status	Rename, recolour, or set is_complete — a board has at most one
reorder_statuses	The complete list of uuids, in order; a stale list is a 409
delete_status	The column must be empty, and a board keeps one
create_group	A swimlane; there is no rename route, so a wrong name is deleted and remade
reorder_groups	Same complete-list contract as reorder_statuses
delete_group	Tickets in it survive, ungrouped — and their versions all move
create_custom_field	Workspace owner or admin; type cannot be changed afterwards
update_custom_field	Rename, reorder, or replace a select's whole options list
delete_custom_field	Takes every ticket's value in that field with it — no trash, no restore

This is what a board an agent creates needs to stop being its template's defaults. The two reorder tools want the whole list because a partial one is how two simultaneous reorders silently drop a column: read the uuids off get_board immediately before calling, and re-read on a 409.

Labels

Tool	Notes
list_labels	Workspace-wide, alphabetical — get_board shows only what a board uses
create_label	A hex colour is required; names are unique ignoring case and space
update_label	Renames it everywhere — one label, not a copy per board
delete_label	Removes it from every ticket that carries it

A label is a workspace object shared by every board, which is the thing to be sure of before renaming one: it changes for everybody. The uuids these return are what update_ticket takes as label_uuids.

Attachments

Tool	Notes
list_ticket_attachments	Name, type, size and uuid — never the bytes
get_ticket_attachment	Text inline, an image as an image block, anything else via save_to
upload_ticket_attachment	file_path for a file on disk, or text + filename for something written
delete_ticket_attachment	To the trash for 30 days; there is no restore tool

get_ticket reports attachment_total, so you know whether listing is worth a round trip.

Binary content crosses the tool boundary by not crossing it. A tool result is text, Laver allows 25 MB per file, and 25 MB of base64 is roughly nine million tokens — so only text, CSV and images under 4 MB come back inline, and everything else needs save_to, which writes the file to a path on the machine running this server (normally the agent's own, since the client starts it as a subprocess). Uploads go the same way round: file_path reads from that machine and costs no context.

An image comes back as an MCP image block rather than as text, which is the only form a model can actually look at — that is the whole point of the tool, since the screenshot somebody attached is usually the specification.

Wiki

list_wikis, search_wiki, get_wiki_tree, get_wiki_page, get_wiki_page_version, append_wiki_page, update_wiki_page, create_wiki_page — which takes the body as markdown and nests under parent_page_uuid — and restore_wiki.

Archiving a wiki (done in the browser; there is no tool here for it) takes it and every page under it out of list_wikis entirely. list_wikis takes archived: true to see those instead — the only place an archived wiki_uuid is visible at all — and restore_wiki is the only thing here that does something with one: it un-archives the wiki, and every page under it, in one call.

get_wiki_page_version is how you read something that was overwritten. It is a read: the page does not move. There is deliberately no tool to put an old version back — read it and write the wording you want with update_wiki_page, which leaves a version of its own behind.

append_wiki_page adds to the end of a page and update_wiki_page replaces what is on one; prefer the first when you are adding, because it takes no version and two agents appending at once both get their text. Replacing takes the version from get_wiki_page, and a page somebody wrote to meanwhile is a 409 carrying the current version rather than an overwrite — the guard that lets this exist at all, since wiki pages sit behind a live collaborative editor. A replace re-seeds that editor from what it just wrote, so a colleague with the page open sees the new text instead of putting the old text back, and every previous save stays readable through get_wiki_page_version. There is still no tool to delete a page.

The markdown goes through the same parser ticket descriptions do. Headings, lists, tables, code blocks, blockquotes, rules and links survive; so does an ![alt](https://…) image, as a reference to that URL — there is no tool here to upload an attachment, so the URL has to be public already. Raw HTML is kept as literal text rather than interpreted.

Automations

Tool	Notes
list_automations	The rules on a board, each with its version
get_automation	One rule in full — the conditions and actions an edit replaces
list_automation_runs	What a rule has actually done, newest first
create_automation	Owner or admin only — and see below before calling it
update_automation	Needs version; enabled: false is the reversible stop
delete_automation	Needs version, and takes the rule's whole run history with it

An automation rule is a trigger, optional conditions and up to twenty actions, stored against a board. Three things about them are worth knowing before an agent touches these tools:

• A rule created here is live immediately. It fires on its trigger within a couple of seconds, so read list_automation_runs afterwards rather than creating one speculatively to see what it would do.
• A rule is a standing grant. It runs as the user this key acts as, every time it is triggered, for as long as it exists — not once, like every other write in this server. Revoking the key does not stop it; disabling or deleting the rule does.
• Pause before you delete. update_automation with enabled: false stops a misbehaving rule at once and keeps its history; deleting destroys the history along with the rule. conditions and actions replace the stored lists rather than merging into them, so build them from get_automation and not from memory.

Both writes take the rule's version and answer 409 with the current one, the same contract ticket writes have.

Published links

list_published_links is the inventory read: what of this workspace's is on the public internet right now, each row with its share token, who published it, when, and how many strangers have looked. live is what a stranger actually gets and dark_reason says why a row is not, which is the only way to find a published page that is currently archived and would go straight back online if somebody restored it. Workspace owner or admin only; an ordinary member is a 403. Taking a link back down is deliberately not a tool — report what is published and let a person decide what comes off.