ticket-monitoring

Watches District and BookMyShow showtimes and sends a max-priority push to your phone the second tickets go on sale for the movie, date, format and cinema you care about.

I built this because IMAX shows kept selling out before I even knew they'd opened. Refreshing the page a few times a day wasn't working. Now something else checks every 60 seconds and yells at me when it matters.

How it works

Every 60 seconds it calls the same showtime APIs the two sites use themselves, and filters the result down to your cinema and format. When something matches, it pushes to ntfy, a free open-source notification service with iOS and Android apps.

Both sites can be watched at once, in one process. Each keeps its own dedupe and failure state, so tickets appearing on one site never suppress the alert for the other, and one site going down doesn't stop the other from being checked.

The part I care most about: silence always means "not open yet". If checks start failing you get a BROKEN push after six failures in a row, naming the site that's failing, plus an optional daily heartbeat. A monitor that died at 3am and one that's quietly working should never look the same from the outside.

Alerts are deduplicated by session id, so you hear about each show once. Shows added later still get through.

Notification	Priority	What it means
<FORMAT> <DATE> OPEN on <SITE> - BOOK NOW	max	The one you're waiting for. Tap it to book.
<DATE> is OPEN on <SITE> (no <FORMAT> yet)	high	Date opened, your format hasn't shown up yet.
<SITE> checks BROKEN - check manually	high	That site's checks are failing. Don't trust the silence.
<SITE> checks recovered	default	Back to normal.
Still watching <DATE>	min	Daily heartbeat, with a line per site.
Monitor retired	default	Target date passed, so it stopped on its own.

Requirements

The ntfy app on your phone, and either Docker or Node.js 22+.

Quickest start: run the published image

A prebuilt image is published to GitHub Container Registry on every push to main, for both linux/amd64 and linux/arm64. It runs as-is on a normal server, an Apple Silicon Mac or a Raspberry Pi, with nothing to clone and nothing to build.

Grab .env.example, save it as .env, fill it in using "Finding your IDs" below, then:

docker run -d --name ticket-monitoring \
  --restart unless-stopped \
  --env-file .env \
  -p 4733:4733 \
  -v ticket-monitoring-data:/data \
  ghcr.io/aculix/ticket-monitoring:latest

docker logs -f ticket-monitoring

You want to see a line per site once a minute, like [district] closed | matched: 0 | failures: 0.

The volume is what stops it re-alerting you about shows it already found, so keep it around across restarts. Drop the -p flag if you don't want the status endpoint reachable. To update, pull the image again and recreate the container:

docker pull ghcr.io/aculix/ticket-monitoring:latest
docker rm -f ticket-monitoring   # then re-run the docker run command above

Only :latest is published, so that's always the current build of main.

Quick start with Docker Compose

Handy if you'd rather keep the config in a file you can edit in place:

git clone https://github.com/aculix/ticket-monitoring.git
cd ticket-monitoring
cp .env.example .env      # edit it, see "Finding your IDs" below
docker compose up -d      # add --build to build locally instead of pulling
docker compose logs -f

Quick start without Docker

npm install
cp .env.example .env      # edit it
npm run check             # one check against every configured site
npm start                 # run it for real

Run npm run check first. It's the fastest way to find out you got an ID wrong, and much less annoying than discovering it three hours into a run. Needs Node 22+ for the built-in --env-file support.

Finding your IDs

Configure either site, or both. Skip a site by leaving its main ID unset: no DISTRICT_MOVIE_CODE means District isn't watched, no BMS_EVENT_CODE means BookMyShow isn't.

District

Everything is sitting in the movie's page URL for your city:

https://www.district.in/movies/the-odyssey-movie-tickets-in-ahmedabad-MV187151?frmtid=y7EZNLXN5Y&fromdate=2026-09-25
                                                          └── CITY_KEY ──┘ └CONTENT_ID┘        └─MOVIE_CODE─┘

• DISTRICT_CONTENT_ID is the number after MV
• DISTRICT_MOVIE_CODE is the frmtid parameter, which pins down the movie and the language
• DISTRICT_CITY_KEY is the city slug in the path
• DISTRICT_LAT and DISTRICT_LNG can be any coordinates inside that city. The API refuses to answer without them, though results are city-wide either way.
• DISTRICT_BOOKING_URL is the whole URL with fromdate set to your target date

BookMyShow

From the movie's page URL:

https://in.bookmyshow.com/movies/ahmedabad/avengers-endgame-encore/ET00514163
                                  └REGION_SLUG┘                    └EVENT_CODE┘

• BMS_EVENT_CODE is the ET... code
• BMS_REGION_SLUG is the city slug, and BMS_REGION_CODE is the short code BMS uses internally (AHD for Ahmedabad). If you don't know yours, open a showtimes page for your city and look at the regionCode parameter in the network request, or try the obvious abbreviation.
• BMS_REF_EVENT_CODE only matters when a URL carries a refEventCode that differs from the event code, which happens for format-specific listings. Leave it unset otherwise.

Both

DISTRICT_CINEMA_ID and BMS_VENUE_CODE restrict alerts to one cinema. The fiddly part is that neither is in the URL. Easiest approach: leave them empty at first, which watches every cinema in the city, run npm run check, and read the ids out of the output. Or leave them empty for good and let the alert tell you where the shows are.

Want any format, not only IMAX? Clear DISTRICT_FORMAT_TAG, DISTRICT_FORMAT_MATCH and BMS_FORMAT_MATCH.

Configuration

Everything is environment variables. .env is only a convenient place to put them. Full list with comments in .env.example.

Variable	Default	Purpose
TARGET_DATE	required	The date you're waiting for, YYYY-MM-DD
NTFY_TOPIC	required	The topic you subscribe to. Treat it like a password.
DISTRICT_MOVIE_CODE		Set to watch District. Plus DISTRICT_CONTENT_ID, DISTRICT_CITY_KEY, DISTRICT_LAT, DISTRICT_LNG
DISTRICT_CINEMA_ID	(any)	Restrict District to one cinema
DISTRICT_FORMAT_TAG	imax_2d	Session tag that counts as a match
DISTRICT_FORMAT_MATCH	IMAX	Screen-format substring that counts as a match
DISTRICT_BOOKING_URL		Opens when you tap a District notification
BMS_EVENT_CODE		Set to watch BookMyShow. Plus BMS_REGION_CODE, BMS_REGION_SLUG
BMS_VENUE_CODE	(any)	Restrict BookMyShow to one cinema
BMS_FORMAT_MATCH	IMAX	Screen-format substring that counts as a match
BMS_LANGUAGE	(all)	Restrict to one language's shows
BMS_BOOKING_URL		Opens when you tap a BookMyShow notification
PROVIDERS	(all configured)	Allow-list, e.g. district to temporarily watch only one
FORMAT_LABEL	IMAX	What the format is called in the alert text
NTFY_URL	https://ntfy.sh	Your own ntfy server, if you run one
NTFY_TOKEN		Only if your server wants auth
CHECK_INTERVAL_SECONDS	60	Poll interval
FAILURE_THRESHOLD	6	Failures in a row before the BROKEN alert
TZ_OFFSET_MINUTES	330	Timezone for showtimes and dates, 330 is IST
HEARTBEAT_HOUR	9	Local hour for the daily heartbeat, -1 turns it off
CURRENCY	₹	Price prefix
EXPIRY_UTC	auto	When to retire. Defaults to local midnight after TARGET_DATE.
STATE_PATH	./state.json	Where dedupe state lives, /data/state.json in Docker
PORT	4733	Status endpoint
PROXY_URL		SOCKS5 proxy for both sites' checks, see below

v1 used flat names (MOVIE_CODE, CINEMA_ID and friends) for District. Those still work, so an existing .env keeps running unchanged.

Status endpoint

While running continuously it serves JSON on PORT, which defaults to 4733:

• / gives you state and lastTick per site, plus proxied
• /?force=1 adds a live check of every site right now, with no notifications and no state changes
• /healthz returns {"ok":true}

curl -s localhost:4733/ | jq

Watch lastTick. If a site's entry is more than a couple of minutes old, the loop is stuck.

Troubleshooting

District returns HTTP 403

District's WAF is blocking your host. This happens reliably on cloud providers. An earlier version of this ran as a Cloudflare Worker, worked fine for two days, then got blocked permanently, while a home connection was never touched once. Either run it from a residential connection, or point PROXY_URL at a SOCKS5 proxy. Only the site checks go through the proxy. Notifications stay direct, so your alerts don't depend on it.

One gotcha if your proxy is IPv6-only: a socks5:// URL makes some clients resolve DNS locally and hand the proxy an IPv4 address it cannot reach. The monitor rewrites the scheme to socks5h:// so the proxy does the resolving, which fixes that and changes nothing for other proxies.

BookMyShow returns HTTP 403

BookMyShow blocks on two things at once. First the TLS fingerprint of the client, which is why plain curl and Node's fetch get 403 no matter which headers or cookies you send. That part is handled by impit, which performs the request with a real Chrome fingerprint. Second your IP, if it belongs to a datacenter: BookMyShow 403s cloud hosts even with a perfect fingerprint, which I confirmed from GitHub Actions runners.

So on a cloud host you need both, and setting PROXY_URL covers the second half. If you are still getting 403s from a residential connection, the impersonation has probably stopped matching the current Chrome, so update the image or run npm update impit.

ntfy returns HTTP 429

Public ntfy.sh rate-limits by IP, and shared cloud egress IPs are usually spent already by other people. Self-host ntfy and set NTFY_URL, or run from home.

Notifications arrive, but silently

That's your phone, not the monitor. Open the subscription in the ntfy app and let max-priority messages through Do Not Disturb.

Alerts repeat, or never arrive again

Dedupe lives in the state file at STATE_PATH, or in the data/ volume under Docker. Delete it to start fresh. Do this whenever you change TARGET_DATE, otherwise it still thinks it has already told you about those shows.

Nothing happens at all

Run npm run check for a single noisy check. Configuration problems are reported explicitly.

Development

npm test        # 24 tests, no network needed

The tests run the alert state machine and both site parsers against real captured API responses in test/fixtures/. Layout:

• src/providers/district.js and src/providers/bookmyshow.js fetch and normalize showtimes. Each exports check() and extract(), and nothing else knows which site a session came from.
• src/monitor.js decides what to alert about and when to stay quiet
• src/index.js is the runner, state file and status server
• src/config.js reads the environment
• src/lib.js has the shared time helpers

Adding a third site means writing one file in src/providers/ and registering it in config.js. docs/design-notes.md covers what I learned about both APIs and why the alert logic is shaped the way it is.

Notes

This polls public endpoints once a minute, which is roughly what a person refreshing the page would do, to buy their own tickets. It doesn't automate purchases, hold seats or skip any queue. Please keep it that way: don't drop the interval, don't run ten copies, don't use it to scalp.

Not affiliated with District, BookMyShow, PVR or IMAX. Both APIs are undocumented and can change whenever they feel like it.

License

MIT, see LICENSE.