diff --git a/docs/docs/development/API/akkoma_api.md b/docs/docs/development/API/akkoma_api.md
index 786445459..cc3f7ddec 100644
--- a/docs/docs/development/API/akkoma_api.md
+++ b/docs/docs/development/API/akkoma_api.md
@@ -138,3 +138,9 @@ pleroma_local_users_total 3
 ```json
 {"deleted":"ok"}
 ```
+
+
+## `/api/v1/timelines/bubble`
+### Returns a timeline for the local and closely related instances
+Works like all other Mastodon-API timeline queries with the documented
+[Akkoma-specific additions and tweaks](./differences_in_mastoapi_responses.md#timelines).
diff --git a/docs/docs/development/API/differences_in_mastoapi_responses.md b/docs/docs/development/API/differences_in_mastoapi_responses.md
index 053dc9663..207ecd6e7 100644
--- a/docs/docs/development/API/differences_in_mastoapi_responses.md
+++ b/docs/docs/development/API/differences_in_mastoapi_responses.md
@@ -8,20 +8,28 @@ Akkoma uses 128-bit ids as opposed to Mastodon's 64 bits. However, just like Mas
 
 ## Timelines
 
+In addition to Mastodon’s timelines, there is also a “bubble timeline” showing
+posts from the local instance and a set of closely related instances as chosen
+by the administrator. It is available under `/api/v1/timelines/bubble`.
+
 Adding the parameter `with_muted=true` to the timeline queries will also return activities by muted (not by blocked!) users.
 
 Adding the parameter `exclude_visibilities` to the timeline queries will exclude the statuses with the given visibilities. The parameter accepts an array of visibility types (`public`, `unlisted`, `private`, `direct`), e.g., `exclude_visibilities[]=direct&exclude_visibilities[]=private`.
 
-Adding the parameter `reply_visibility` to the public and home timelines queries will filter replies. Possible values: without parameter (default) shows all replies, `following` - replies directed to you or users you follow, `self` - replies directed to you.
+Adding the parameter `reply_visibility` to the public, bubble or home timelines queries will filter replies. Possible values: without parameter (default) shows all replies, `following` - replies directed to you or users you follow, `self` - replies directed to you.
 
 Adding the parameter `instance=lain.com` to the public timeline will show only statuses originating from `lain.com` (or any remote instance).
 
-Home, public, hashtag & list timelines accept these parameters:
+All but the direct timeline accept these parameters:
 
 - `only_media`: show only statuses with media attached
-- `local`: show only local statuses
 - `remote`: show only remote statuses
 
+Home, public, hashtag & list timelines further accept:
+
+- `local`: show only local statuses
+
+
 ## Statuses
 
 - `visibility`: has additional possible values `list` and `local` (for local-only statuses)