Kamai MCP Server

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

With KAMAI_QUERY_TOOLS=on (see below):

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, 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.

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

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.