Last updated 30 August 2026. Written in plain English on purpose. Using the service means accepting these.
sincewhen fetches public web pages on a schedule, normalizes them to text, and reports the differences between versions over an API, an MCP server, a markdown digest, RSS, and webhooks.
There is no uptime guarantee and no SLA. This is a new service with a short track record. Checks can be late, fail, or be missed entirely — a site can block our crawler, rate-limit us, change its markup, or serve a page that only assembles itself in a browser, in which case we may fetch it successfully and still recover nothing readable.
So: do not use sincewhen as the only mechanism for anything that matters. If missing a change would be expensive — a compliance deadline, a security advisory, a contractual notice — it needs a second, independent source. We try hard to tell you when we could not look rather than implying nothing happened (that is what the coverage section of every digest is for), but "we told you honestly that we failed" is not the same as "we did not fail".
Change summaries on the Pro plan are generated by a language model. Treat them as a convenience, not as a reliable or complete account of what changed — the diff underneath is the source of truth, and it is always available.
http(s) pages only. Literal IP addresses, internal hostnames, and non-web ports are refused — at creation and at every redirect hop.We may remove a watch, or an account, that breaks these. Where there is time and it is not obviously deliberate, we will say why first.
The free plan is free. Pro is $5 per month or $48 per year, billed by Stripe, and you can cancel at any time from the billing portal in the dashboard — cancelling stops the next charge and leaves you on Pro until the period you have paid for ends. Prices may change; if they do, existing subscribers get notice before it applies to them.
If the service fails you badly enough that you want your money back, ask. Given how few accounts exist, that is a conversation and not a form.
The pages we fetch belong to the people who published them. We store normalized copies to compute differences and show you what changed; we do not claim ownership of them and we do not republish them as our own. If you are a site owner who wants us to stop, the fastest route is blocking SinceWhenBot, which stops checks visibly rather than silently — but you can also just ask.
Your watch list, names, and configuration are yours. Delete them, or the whole account, whenever you like.
You can delete your account at any time — see privacy for exactly what that removes and what it does not. We can suspend or close an account that breaks the rules above or that we cannot operate safely. If we shut the service down, we will give as much notice as we can and stop charging immediately.
The service is provided as-is. To the extent the law allows, we are not liable for losses arising from a change we failed to detect, reported late, or reported wrongly. Where liability cannot be excluded, it is limited to what you have paid us in the previous twelve months — which for a free account is nothing, and that is the honest measure of what a free account should be relied on for.
These were written to be accurate and readable rather than to be maximally protective, and they have not been reviewed by a lawyer. If you are evaluating sincewhen for something where that matters, say so and we will get them looked at properly rather than pretending otherwise.