Almost nothing happens here.

Every time on the page - each city's clock, the overlap, the daylight on the globe - is worked out in your browser from the timezone database it already ships with. None of it is sent anywhere. The cities you pin, the date, the time and the meeting length live in the address bar, which is how sharing a link works; nothing is written to storage on your device and nothing is kept when you close the tab.

If you use "Paste a suggestion", that message is sent to Anthropic's API so a model can read what day and time it is proposing. That is the only thing you type that ever leaves your browser, and it only happens when you press the button.

We do not log it, store it or keep a record of it at our end. Anthropic's commercial terms say they may not train models on it, and that is the part we can point at. What we cannot tell you is that it vanishes: Anthropic does not offer ad hoc deletion on API data, so the message is held on their systems for a period set by their retention policy rather than by us. Anthropic is a US company and the request is processed outside the UK. If you would rather none of that happened, do not use that tab - the rest of the tool works without it.

This page used to say the message was “not retained beyond serving the request” and “not used to train anything”. That was more than Anthropic's terms actually promise, and it was corrected on 19 September 2026 rather than quietly reworded.

The only thing recorded about that request is a count, kept against your IP address for an hour, so one visitor cannot run up a bill for everyone. The count is a number; it carries nothing you typed. That counter runs on Upstash, so your IP address reaches them for that hour. They never see the message.

Meridian has an MCP endpoint, so an assistant can ask it the same question the page answers. A call carries city slugs, a date and a meeting length, and comes back with times. None of that is logged or stored, nothing reaches a model, and there is no key or account attached to it. Two numbers are kept: the count that stops one caller flooding it, against an IP address for an hour as above, and a count of calls by tool name, so we can tell whether anything out there uses it. Neither carries a city, a date, a meeting length or anything you typed. What it does.

Meridian counts visits with Vercel Web Analytics. It sets no cookies and no storage of any kind, and it has no identifier for you - a visit is counted against a hash of the request that is thrown away within the day, so we cannot tell a returning visitor from a new one, and we cannot follow anyone between our tools. We checked that ourselves rather than taking the supplier’s word for it.

The address bar is stripped before anything is sent, so the cities and times in a shared link are never in it. Beyond that it counts six things: a city added, the sun moved, a message parsed, a link shared, an embed taken, and a call to the MCP endpoint, with the name of the tool called and nothing else. Nothing you type is ever part of an event.

Until 17 September 2026 this page was wrong about that. It said Meridian used Google Analytics “configured to set no cookies at all”, on the strength of a setting called client_storage: "none". That setting does nothing: it belongs to an older version of Google Analytics, and the current one writes a cookie regardless. We found it by wiping the cookies, reloading and watching them come back. Google Analytics has now been removed from this tool altogether, which is what made the sentence at the top of this page true.

Your IP address reaches Vercel, who host Meridian, as part of any request to any website, and is used for approximate location and for the rate limit above. We do not store it ourselves.

The embed is the same tool inside an iframe. It sets no cookies and sends nothing to the host page. If you embed Meridian, your visitors are covered by this notice for the frame itself.

Meridian is made by Digitopia Design Ltd, a company registered in England and Wales, number 12037302, registered office 124 City Road, London, EC1V 2NX, trading as Digitopia Labs. Our ICO registration is ZC160761. That is the same company named at the top of every page here. For anything on this page, or to ask what we hold about you (which should be nothing), write to hello@digitopiadesign.com.

We count visits on the basis of our legitimate interest in knowing which parts of the tool get used, and we count requests to the parse route so one visitor cannot run up the bill for everyone. Visits are counted by Vercel, who host this tool, and requests to the parse route by Upstash. Both are US companies, so that processing happens outside the UK under the standard contractual clauses in their data processing terms.

You can ask for a copy of anything held about you, ask for it to be erased, or object to the counting altogether, at the same address. If you think we have got something on this page wrong, you can also complain to the Information Commissioner’s Office at ico.org.uk.

Last updated 19 September 2026.