I'm getting the following result from the API when an expired token is used. Here is the result. { "type":"api_notfound_error", "message":"https://[REDACTED].prismic.io/previews/[REDACTED]?websitePreviewId=[REDACTED] not found" } I've had an error handler that looks for "This preview token has…

HI Ben, I'm really sorry about how long it took to get this information for you. I suck. So I confirmed with Seb and Renaud. If any ref starts with https:// and is either expired or invalid you get this error. The API hasn't changed and this has been how expired ref have been returned as long as I…

I see, thanks for the information, I've asked the team. I'll get back to you as soon as I have an answer Thanks

Hello, I've discussed this with the team today and we've agreed to add it to the issue tracker. Also, if you would like to do a collaboration to make it quicker you can submit a PR to the kit and we'll review it as soon as we can. Thanks

@benembery I've reopened this for you now.

@benembery I'm just quoting you here to see if I can get more info for you. [image] On another topic I would be happy to help with PR but need confirmation that the API response is expected. Which api response are you describing?

The CSharp Kit sets the ref set based on the preview cookie, if the cookie is expired they the request throws an exception. This exception has changed. { "type":"api_security_error", "message":"This preview token has expired", "oauth_initiate":"https://[REDACTED].prismic.io/auth", "oauth_t…

@Phil you definitely do not suck. I appreciate your support, thanks for getting back to me, it wasn't super critical. I now have another little improvement I can make for people using prismic with .NET. :smiley:

Hi, I have suddenly a similar issue. One of my pages on the live server receives the error "This preview token has expired" when trying to fetch data. The same page on the dev server works fine though. In general, my website exists of pages that have no data from Prismic, pages that source some dat…

Hi Goppi, I just want to start off by saying that there are no fears of this being an issue for your customers as the preview cookie only exists in the local browser and is only generated for logged-in Prismic users. So there's no way a customer could encounter this error. The Prismic toolbar shou…

Hi @Phil , I don't quite understand what you are saying in your post - especially as you seem to emphasize on that cookies are stored locally - of course that's the case, but I'm not sure what led you to believe that I think otherwise. In any case, I still have a few question in regards to this iss…

Hi Goppi, I was only re-enforcing the understanding that the cookies are only generated by users logged in to Prismic, so a normal website user will not receive a shared preview link. Whereas you or anyone else using Prismic can generate their own preview links. Does the Toolbar create cookies in…

Preview token expired errors

Developing with Prismic

Phil (Phil Snow) Split this topic February 6, 2026, 12:17pm 31

A post was split to a new topic: Preview cookies expiring

Topic		Replies	Views
Preview cookies expiring Prismic for Content Creators preview-cookies	1	24	February 6, 2026
Preview Expired Fail More Gracefully? Developing with Prismic php	5	1027	December 9, 2021
Error: This preview token has expired Developing with Prismic ruby	4	2144	December 9, 2021
Error in Preview : Ref / Token Developing with Prismic rest-api	3	1182	December 9, 2021
Preview error (expired token) Developing with Prismic nuxtjs	9	1657	December 9, 2021

Preview token expired errors

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