How visa slot alerts work, and the seven questions to ask before paying

Four ways people track slots

1. Checking the official site yourself

Free, authoritative, and no longer sufficient. When openings are cancellations appearing at arbitrary hours and lasting minutes, human checking finds almost none of them. It remains the only way to book, and you should always confirm an alert there.

2. Public Telegram and WhatsApp groups

Free, fast, and genuinely useful — this is where most sightings surface first, usually as screenshots. The cost is volume: hundreds of messages a day, nearly all irrelevant to your consulate, visa type or party size, arriving at every hour. Effective if you can watch a firehose. Exhausting if you cannot.

3. Browser extensions and pollers

These watch the booking system directly — sometimes while you are logged in, sometimes using credentials you hand over. Fastest possible detection, and the approach with the most serious drawbacks: it is automated interaction with a system whose terms forbid it, it breaks whenever anti-bot measures change, and it needs a desktop browser to stay open. Any version that stores your scheduling login should be a hard no.

4. Alert services

A service watches on your behalf and notifies you. The differences that matter between them are narrower than the marketing suggests:

• Where does the data come from? Community reports (legally clean, slightly slower, broader across party sizes) or direct polling (faster, fragile, against the booking site's terms).
• How does the alert reach you? Push to your phone, an app you must open, or email. Only the first matches the timescale.
• What does it filter on? Consulate and visa type is the normal minimum. Party size is the one that decides whether an alert is bookable at all — and almost nobody does it.

Seven questions to ask before paying anyone

1. Do you need my visa-scheduling password? If yes, walk away. No feature justifies giving a third party the ability to act on your application.
2. Do you filter by the number of people on my application? If not, expect a large share of alerts you cannot use.
3. How does the alert reach me? If the answer involves opening an app, it is too slow.
4. Does the alert say when the slot was seen? Without a timestamp you cannot judge whether to race for it.
5. What happens if nothing opens all month? Every honest answer involves money coming back.
6. Are you connected to the consulate? Nobody legitimate is. Branding that suggests otherwise is a deliberate choice.
7. How do I stop? If cancelling is harder than starting, that tells you what the business model is.

What no alert service can do

• Guarantee you an appointment. Whether slots open is decided by the consulate, not the vendor.
• Guarantee the slot is still there. By the time any alert reaches you, somebody may already have taken it.
• Book for you without your credentials — and with them, you have handed over control of your own application.
• See what nobody reported. Coverage is bounded by the source, whatever the source is.

A service that claims any of these four is worth being sceptical about, whatever else it offers.

Written August 2026. Consular policy and wait times change without notice — always check the official travel.state.gov and usvisascheduling.com for the current position. Nothing here is legal advice.