Centerfield Visitor Mcp

Centerfield Visitor MCP

An MCP (Model Context Protocol) server that automates visitor reservations for the Centerfield building (www.centerfield.co.kr). Use it from any MCP-compatible agent — Kiro CLI / Kiro IDE / KiroCrew, Claude Code, Claude Desktop, Codex CLI, Cursor, Strands Agents (local stdio) and Amazon Quick or any remote client (streamable HTTP) — to register visitors with natural language: single entries, pasted text, survey exports, or Excel/CSV files.

센터필드 빌딩 방문예약을 자동화하는 MCP 서버입니다. 로컬 에이전트(Kiro, Claude Code, Codex, Cursor …)는 stdio로, Amazon Quick 같은 원격 에이전트는 streamable HTTP로 같은 서버를 씁니다.

The stdio server runs entirely locally — uvx downloads and runs it on your machine, and it talks directly to www.centerfield.co.kr. No backend service is required for local agents.

Quick start

mkdir -p ~/.config/centerfield-visitor-mcpcp .env.example ~/.config/centerfield-visitor-mcp/.env   # fill CF_COMPANY_NAME, CF_PERSON_IN_CHARGE_MOBILEuvx centerfield-visitor-mcp                               # stdio; every client below can launch this

~/.config/centerfield-visitor-mcp/.env is read automatically, so client configs need no secrets.

Client setup

Agent skill (Agent Skills spec, works in Claude Code / Kiro / KiroCrew): SKILL.md — also shipped as the project skill .claude/skills/centerfield-visitor/SKILL.md.

Tools

register_* tools exist only while CF_EXPOSE_WRITE_TOOLS is true (default).

Recommended flow: validate_configuration once → preview_* → human confirms → register_*. The default_* arguments fill columns that attendee lists usually lack (visit date/time/floor). participation keeps only rows whose attendance-type column contains the given text (see below). Previews mask mobile numbers and emails (010******78, h***@example.com); pass the original values to register_*.

With CF_EXPOSE_WRITE_TOOLS=false the three register_* tools are not registered at all, so the server is preview-only regardless of what a client sends.

Reservation outcomes

Every visitor gets one status (ReservationResult.status; success is kept for compatibility and is true only for SUCCEEDED):

Bulk calls stop at the first UNKNOWN. The summary always reads 총 N명 중 A명 성공, B명 실패, C명 결과 불명(UNKNOWN), D명 미제출(NOT_SUBMITTED); BulkReservationOut carries succeeded, failed, unknown, not_submitted (they add up to total) and stopped_on_unknown. failed now counts only definite failures (it used to be total - succeeded).

Logs record only the error class and HTTP status, never the site's response text or visitor data.

Input constraints

File / text format

Header row in Korean or English; survey-export headers are recognized too (Full Name, Email, 연락처(…), 소속/회사 (…)). Unknown columns are ignored.

이름,회사,전화번호,이메일,방문일,방문시간,층홍길동,ABC주식회사,01012345678,[email protected],2026-11-15,10:00,12

Lists without date/time columns: pass default_visit_date="2026-11-15", default_visit_time="10:00".

Attendance type (survey exports): a column such as 참석 형태 / 어떤 형태로 참석하시나요? / Participation is detected and summarised in the preview (참석 형태 컬럼 감지: 온라인 7, 오프라인 3). Pass participation="오프라인" to process only rows whose value contains that text (case/space-insensitive; rows with an empty value are dropped and counted). If a filter is requested but the input has no such column, register_* refuses instead of registering everyone, and preview_* shows the unfiltered rows under a warning.

Configuration

.env load order (later overrides earlier): ~/.config/centerfield-visitor-mcp/.env → ./.env → $CF_ENV_FILE; process environment variables always win. Startup logs (stderr) list the files read and any problems.

CF_PERSON_IN_CHARGE_MOBILE must be the mobile number registered as the tenant's approval contact. Run validate_configuration after setup — it checks both values live without creating a reservation.

Remote mode (Amazon Quick, hosted deployments)

CF_TRANSPORT=streamable-http CF_HTTP_HOST=0.0.0.0 uvx centerfield-visitor-mcp    # http://host:8000/mcpdocker build --platform linux/arm64 -t centerfield-visitor-mcp .                 # or the container image

See clients/remote/README.md for the AgentCore Runtime + Cognito recipe and the Amazon Quick connector steps. Works with mcp SDK 1.x and 2.x.

Development & testing

uv sync --group devuv run pytest                          # offline unit tests (mocked HTTP)uv run --with "mcp<2" pytest           # same suite on mcp SDK 1.xuv run python scripts/smoke_http.py    # streamable-http transport smoke testuv run pytest -m live                  # read-only checks against the live site (needs a real .env)CF_LIVE_REGISTER=1 CF_TEST_VISITOR_NAME=... CF_TEST_VISITOR_MOBILE=... CF_TEST_VISITOR_EMAIL=... uv run pytest -m live

The last command creates one real reservation; confirm it in the Centerfield mobile app and cancel it there (there is no cancel API).

How it works

The server holds a single session against the Centerfield site, manages CSRF tokens, verifies the tenant company and approval contact, resolves the floor key, then submits the reservation form. Bulk requests are processed sequentially with a configurable delay and stop at the first UNKNOWN outcome.

Known limitations

• No server-enforced preview → approval → write binding. The server does not issue a preview token that register_* must present, so "a human approved exactly this list" is enforced by the agent skill and the client's tool-approval prompt, not by the server. A token scheme was deliberately left out until a stateless design is settled (the HTTP transport is stateless, so the token must be verifiable without server-side storage, bound to the exact normalized input, short-lived, and replay-safe). Until then, keep per-call approval on for register_* in your client (do not "always allow"), and use CF_EXPOSE_WRITE_TOOLS=false for endpoints that should only preview.
• No reservation id. The site's success response carries no identifier the server can return; SUCCEEDED means "the site answered success: true". Check the Centerfield app for the booking itself.
• No cancel API. Cancel wrong bookings in the Centerfield app/site.

MCP Registry

Listed as io.github.hmkim/centerfield-visitor-mcp (see server.json).

mcp-name: io.github.hmkim/centerfield-visitor-mcp

License

MIT