io.github.chrischall/myhotlunchbox-mcp

myhotlunchbox-mcp

MCP server for My Hot Lunchbox — read the school lunch calendar, manage students, place and change orders, and track deliveries and payments on a parent account.

Developed and maintained by AI (Claude Code). Use at your own discretion.

Install

npx myhotlunchbox-mcp

Or as a Claude Code plugin:

/plugin marketplace add chrischall/myhotlunchbox-mcp
/plugin install myhotlunchbox-mcp

Configure

MYHOTLUNCHBOX_USERNAME=you@example.com
MYHOTLUNCHBOX_PASSWORD=…

That is the whole setup. The server performs a real server-side sign-in against ordernow.myhotlunchbox.com (OAuth2 password grant) and renews the session with the refresh token it receives — no browser extension, no signed-in tab, no captured cookie. Nothing is written to disk.

MYHOTLUNCHBOX_BASE_URL overrides the app origin if it ever moves.

The server boots without credentials so a host's install-time tools/list probe still works; the configuration error surfaces on the first tool call.

Tools

35 tools, all prefixed mhlb_. All 20 read tools are verified live against a real parent account (node scripts/verify-reads.mjs); the 14 write tools are not — see below.

Account — mhlb_whoami, mhlb_session_reset

Health — mhlb_healthcheck (is this connector working? reports whether the credential resolved, whether My Hot Lunchbox accepted it, and what to fix — unlike mhlb_whoami, which throws instead of answering)

Students — mhlb_list_students, mhlb_get_student_form, mhlb_new_student_form, mhlb_create_student, mhlb_update_student, mhlb_delete_student

Calendar — mhlb_get_calendar, mhlb_get_day

Ordering — mhlb_get_cart, mhlb_get_cart_tabs, mhlb_get_menu, mhlb_get_order_form, mhlb_get_order, mhlb_create_order, mhlb_update_order, mhlb_delete_order

Billing — mhlb_list_transactions, mhlb_get_transaction, mhlb_list_subscriptions, mhlb_get_subscription_settings, mhlb_set_subscription_enabled, mhlb_unsubscribe_order, mhlb_list_gift_cards, mhlb_apply_gift_card, mhlb_get_coupon, mhlb_apply_coupon, mhlb_remove_coupon

Checkout — mhlb_init_checkout, mhlb_checkout

Reports — mhlb_print_calendar, mhlb_print_orders, mhlb_print_transaction. These return real PDFs; each writes the file and returns its path, or the bytes inline with inline: true. Set MYHOTLUNCHBOX_OUTPUT_DIR to choose where they land (defaults to the working directory); existing files are never overwritten.

Writes are confirm-gated

Every mutating tool takes confirm. Without confirm: true it makes no network call and returns a dry-run preview of exactly what it would send.

mhlb_checkout charges a real payment method. The server prices the charge from orderIds, so nothing client-side can bind the amount — there is no total in the request to check against. expectedTotal is therefore attribution, not a guard: you state what you expected, and it is recorded in the dry run and in the result so an unexpected charge is traceable to the call that made it. What the tool does refuse outright is paying a non-zero total with no orderIds.

Writes: shapes captured, acceptance unverified

npm run capture:writes runs every mutating tool against a local proxy that forwards reads to the real service but answers writes itself, so the payloads are built from genuine server models and nothing happens upstream. It also proves all 13 refuse to send anything without confirm: true.

What that established, and corrected: mhlb_delete_order and mhlb_unsubscribe_order take {orderId, eventDate, studentId, isRepeated, isSubscribed} — not the order model — and checkout takes {orderIds, checkoutType, couponCode, giftCardCode, schoolDonations}.

What is still unverified is whether the server accepts these bodies. Shape is not acceptance; only a real write shows that, and none has been made. Inspect the dry-run preview before confirming, and re-read afterwards — a 200 is not proof a write persisted.

Two limits on mhlb_checkout specifically:

• It can only pay with a card already saved on the account. Paying with a new card needs a Stripe token minted by Stripe.js in a browser, which no server-side client can produce.
• It generates an idempotency key and returns it. If a checkout fails ambiguously, retry with that same idempotencyKey rather than a fresh call — that is what stops a retry becoming a second charge.

Ordering is read-modify-write

There is no "add item X" call. Fetch the model, edit it, send it back whole:

1. mhlb_get_menu — what is orderable for a student on a date
2. mhlb_get_order_form — the order model to fill in
3. mhlb_create_order — send it back (with confirm: true)
4. mhlb_init_checkout → mhlb_checkout — price, then pay

Fields omitted from the payload are cleared, not preserved.

Shell skill

skills/myhotlunchbox covers the same account from a shell with curl — no MCP process needed. Useful in scripts, or on a machine where this server is not installed.

Notes

• /deliveryInfo/* and /calendar/viewMatchedVendors look parent-facing in the compiled client but return 403 for a parent account — they belong to the school/vendor dashboards. No tool wraps them.
• Only the parent role is wired. The same API also serves school-admin and vendor roles; those endpoints return 403, which the client reports as a role mismatch rather than a broken session.
• docs/MYHOTLUNCHBOX-API.md records how the API was mapped and exactly what is verified. docs/api-surface.txt is the full 359-endpoint extraction.

Licence

MIT