Kamai

kamai-mcp

Kamai's MCP server: tools and MCP Apps widgets for Kamai construction-blueprint projects, blueprints and takeoffs. It runs against Kamai's MCP API and validates access tokens issued by Kamai's OAuth authorization server. It holds no Kamai secrets.

Tools

Tool	What it does
view_projects	Interactive panel of the user's projects and blueprints
list_blueprints	Blueprints grouped by project, with their ids and whether they are ready
view_blueprint	A blueprint page with its take-off shapes drawn on top
view_takeoff	Measured take-off quantities as a sortable table
list_elements	Per-element rows (rooms, walls, doors, windows, objects) with outlines
list_folders	A blueprint's legend folders
download_plan	A PDF of a processed blueprint with its detected elements highlighted, as a temporary download link
update_elements, move_elements, create_folder	Rename, recolour and refile elements; create a folder
set_opening_height	Store a user-stated height, or a door/window tag, on wall-surface opening pieces
create_project, update_project	Create or rename a project
list_jobs, get_job, cancel_job	Processing jobs of a project
view_upload	Upload panel for a blueprint PDF
ingest_blueprint_from_chat	Import a PDF attached to a ChatGPT message (ChatGPT only)
open_kamai	Open the Kamai app in a panel

With KAMAI_QUERY_TOOLS=on (see below):

Tool	What it does
count_elements	Counts and totals by Kamai category (doors, windows, walls, wet rooms…), grouped, summed in the database
find_elements	Individual elements with type, folder, tag, handing and measurements
calculate_wall_surface_area	Net wall (paint or plaster) area of rooms
render_table	A table panel whose rows highlight their elements on the plan
set_scale	Set a blueprint's drawing scale
set_rotation	Turn how a blueprint is shown (display only)

With KAMAI_HOST_PROBE on (the default on dev and debug, off in prod; see below):

Tool	What it does
probe_host	A diagnostic panel that tests what widgets can use in this chat (WebGPU, WebGL2, workers, WebAssembly, the GCS tile host) and logs the result as a widget_probe event

list_blueprints also takes include_inventory (with a project_id): what each blueprint contains.

list_projects, get_project, get_blueprint, request_blueprint_upload, finalize_blueprint_upload, and with the query tools get_table_row_elements and get_element_outlines, and with the probe report_host_probe, are app-only: callable by the widgets, not advertised to the model.

Run locally with your API key

The quickest way to run this server against your own Kamai data is local mode: the host spawns the server, talks to it over stdio, and the credential is a personal API key from Kamai (API Keys in the Kamai app) instead of OAuth.

bun install
bun run build:widgets
KAMAI_API_KEY=... MCP_API_BASE_URL=https://mcp-api.kamai.io bun run local

Claude Code:

claude mcp add --env KAMAI_API_KEY=... --env MCP_API_BASE_URL=https://mcp-api.kamai.io \
  --transport stdio kamai -- bun /path/to/kamai-mcp/src/local.ts

Claude Desktop (claude_desktop_config.json):

{ "mcpServers": { "kamai": {
    "command": "bun", "args": ["/path/to/kamai-mcp/src/local.ts"],
    "env": { "KAMAI_API_KEY": "...", "MCP_API_BASE_URL": "https://mcp-api.kamai.io" } } } }

The key is used as the bearer for every API call; the tools run as the key's owner. Add KAMAI_QUERY_TOOLS=on to the environment for the query tools.

Run the HTTP server

bun install
cp .env.example .env
bun run dev

The values in .env.example are placeholders: set MCP_PUBLIC_URL and MCP_AUTH_ISSUER to your tunnel and to a reachable authorization server before starting, or every request will be refused with invalid_token.

Variable	Meaning
PORT	Listen port, default 8006
MCP_PUBLIC_URL	The URL hosts call and ask a token for (the resource in discovery); a tunnel, not localhost
MCP_AUTH_ISSUER	Issuer of the access tokens, matched byte for byte against the token's iss
MCP_AUTH_JWKS_URI	Optional. Defaults to {MCP_AUTH_ISSUER}/jwks.json
MCP_API_BASE_URL	Kamai MCP API base URL, https://mcp-api.kamai.io. Also the audience an access token must carry
MCP_ACCEPTED_AUDIENCES	Optional comma-separated audiences, for a cutover. Defaults to MCP_API_BASE_URL
KAMAI_API_KEY	Local mode only: the personal API key the tools run as
KAMAI_APP_ORIGINS	Optional comma-separated extra origins open_kamai may frame; the first becomes the default
KAMAI_QUERY_TOOLS	on registers the query tools. Only once the API layer serves /v1/vocabulary (401, not 404)
KAMAI_ROTATION	off drops set_rotation from the query tools (on by default; needs an API layer that serves PUT .../blueprints/{id}/rotation)
KAMAI_HOST_PROBE	on or off registers probe_host and report_host_probe. Unset, it is on when Cloud Run's K_SERVICE starts with dev- or debug-, off otherwise. Never in local mode
KAMAI_MCP_NO_INSTRUCTIONS	1 leaves the server instructions out, as claude.ai does; for evals

The MCP API and the authorization server are operated by Kamai, so running the HTTP server end to end needs access to both. An MCP server is only really testable against a real host, and a host can only reach a public HTTPS URL, so HTTP-mode development means running behind a tunnel and pointing MCP_PUBLIC_URL at it.

bun run dev builds the widgets first: the server serves the built HTML from dist/widgets/, not the React source, so rebuild after touching anything under src/widgets/app/.

The widgets use React, TypeScript, Vite, Tailwind CSS, DaisyUI and Lucide. Vite produces one self-contained HTML resource per widget, so nothing needs hosting.

Local builds require Bun 1.3.3 and Node.js 22.12 or newer.

Layout

src/index.ts       HTTP server, OAuth protected-resource metadata, MCP transport
src/local.ts       stdio entrypoint for local mode (personal API key)
src/auth.ts        Bearer-token verification (RFC 9728 challenges)
src/server.ts      Tool and resource registration
src/api.ts         Client for the Kamai MCP API
src/elements.ts    list_elements paging, filtering and result budgeting
src/errors.ts      The text a failed tool call shows the model
src/query/         Query tools: descriptions, vocabulary, filters, budgets, contract
src/widgets/       Widget resources, CSP metadata and the React widget sources
scripts/           Widget build (escapes & so Open WebUI can embed the
                   widgets); check-routes and check-vocabulary against a live API
scripts/open-webui/
                   Open WebUI helpers: an open_kamai Tool, a display-mode
                   host script, a local bridge demo

Privacy and support

• Privacy policy: https://kamai.io/privacy-policy
• Support: https://kamai.io/support or [email protected]

Contributing

See CONTRIBUTING.md. Security issues go to the address in SECURITY.md, not to the issue tracker.

License

Apache-2.0. Copyright 2026 Kamai Enterprises LTD.

The Kamai name and logo are trademarks of Kamai Enterprises LTD and are not covered by the license.