rest gateway: include x-wmf-* headers in response
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	daniel
	Feb 18 2026, 1:38 PM

Description

Some x-wmf-* headers should be included in the response so it can be captured by haproxy for analytics purposes.

For now, the following headers should be returned:

x-wmf-ratelimit-class
~~x-wmf-user-id~~ (postponed due to privacy concerns; MW to expose auth type instead, see T418606)

NOTE: These headers should NOT be exposed to the client, so haproxy should filter them out (T417781)

Details

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	rest gateway: expose x-wmf-ratelimit-class in response	operations/deployment-charts	master	+121 -6

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Related Objects
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Status	Assigned	Task
Open	None	T399291 Epic: API Rate Limiting Architecture
Open	None	T412585 Epic: Enforce API rate limits (WE5.1.3c)
Open	None	T417779 rest gateway: enforce rate limits (stage two)
Resolved	daniel	T417778 rest gateway: enforce rate limits (stage one)
Resolved	daniel	T417780 rest gateway: include x-wmf-* headers in response
Resolved	daniel	T417781 haproxy: strip x-wmf-* headers from responses

Event Timeline

daniel created this task.Feb 18 2026, 1:38 PM

daniel created subtask T417781: haproxy: strip x-wmf-* headers from responses.Feb 18 2026, 1:40 PM

daniel removed a project: FY2025-26 KR 5.1.

daniel mentioned this in T414349: Log rate limits from rest-gateway in webrequests.Feb 18 2026, 1:45 PM

Moving to MWI Radar, as MWP & SRE should be responsible for this.

daniel mentioned this in T417864: haproxy: capture x-wmf-* headers in webrequest data set.Feb 19 2026, 9:37 AM

daniel renamed this task from rest gateway: include x-wmf-ratelimit-class header in response to rest gateway: include x-wmf-* headers in response.Feb 19 2026, 9:39 AM

daniel updated the task description. (Show Details)

Change #1240388 had a related patch set uploaded (by Daniel Kinzler; author: Daniel Kinzler):

[operations/deployment-charts@master] rest gateway: expose headers

https://gerrit.wikimedia.org/r/1240388

gerritbot added a project: Patch-For-Review.Feb 19 2026, 9:41 AM

daniel changed the task status from Open to In Progress.Feb 19 2026, 9:49 AM

daniel edited projects, added MediaWiki-Platform-Team; removed MediaWiki-Platform-Team (Radar).

MShilova_WMF subscribed.Feb 19 2026, 6:35 PM

matmarex moved this task from Inbox, needs triage to Q3 Kanban Board on the MediaWiki-Platform-Team board.Feb 23 2026, 3:54 PM

matmarex edited projects, added MediaWiki-Platform-Team (Q3 Kanban Board); removed MediaWiki-Platform-Team.

matmarex moved this task from Essential Work to In Progress on the MediaWiki-Platform-Team (Q3 Kanban Board) board.

daniel updated the task description. (Show Details)Mar 2 2026, 7:26 AM