Which action to perform.

abusefiltercheckmatch

Check to see if an AbuseFilter matches a set of variables, an edit, or a logged AbuseFilter event.

abusefilterchecksyntax

Check syntax of an AbuseFilter filter.

abusefilterevalexpression

Evaluates an AbuseFilter expression.

abusefilterunblockautopromote

Unblocks a user from receiving autopromotions due to an abusefilter consequence.

abuselogprivatedetails

View private details of an AbuseLog entry.

acquiretempusername

Acquire a temporary user username and stash it in the current session, if temp account creation is enabled and the current user is logged out. If a name has already been stashed, returns the same name.

aggregategroups

Manage aggregate message groups.

antispoof

Check a username against AntiSpoof's normalisation checks.

block

Block a user.

centralauthtoken

Fetch a centralauthtoken for making an authenticated request to an attached wiki.

centralnoticecdncacheupdatebanner

Request the purge of banner content stored in the CDN (front-end) cache for anonymous users, for the requested banner and language

centralnoticechoicedata

Get data needed to choose a banner for a given project and language

centralnoticequerycampaign

Get all configuration settings for a campaign.

changeauthenticationdata

Change authentication data for the current user.

changecontentmodel

Change the content model of a page

checktoken

Check the validity of a token fromaction=query&meta=tokens.

clearhasmsg

Clears thehasmsg flag for the current user.

clientlogin

Log in to the wiki using the interactive flow.

communityconfigurationedit

Change the content of a configuration provider in Community configuration

compare

Get the difference between two pages.

createaccount

Create a new user account.

createlocalaccount

Forcibly create a local account. The central account must exist.

delete

Delete a page.

deleteglobalaccount

Delete a global user.

discussiontoolsedit

Post a message on a discussion page.

discussiontoolsfindcomment

Find a comment by its ID or name.

discussiontoolsgetsubscriptions

Get the subscription statuses of given topics.

discussiontoolssubscribe

Subscribe (or unsubscribe) to receive notifications about a topic.

discussiontoolsthank

Send a public thank-you notification for a comment.

echocreateevent

Manually trigger a notification to a user

echomarkread

Mark notifications as read for the current user.

echomarkseen

Mark notifications as seen for the current user.

echomute

Mute or unmute notifications from certain users or pages.

edit

Create and edit pages.

editmassmessagelist

Edit a mass message delivery list.

emailuser

Email a user.

expandtemplates

Expands all templates within wikitext.

featuredfeed

Returns a featured content feed.

feedcontributions

Returns a user's contributions feed.

feedrecentchanges

Returns a recent changes feed.

feedthreads

Return a feed of discussion threads.

feedwatchlist

Returns a watchlist feed.

filerevert

Revert a file to an old version.

flow

Allows actions to be taken on Structured Discussions pages.

flow-parsoid-utils

Convert text between wikitext and HTML.

flowthank

Send a public thank-you notification for a Flow comment.

globalblock

Globally block or unblock a user.

globalpreferenceoverrides

Change local overrides for global preferences for the current user.

globalpreferences

Change global preferences of the current user.

globaluserrights

Add/remove a user to/from global groups.

groupreview

Set message group workflow states.

help

Display help for the specified modules.

imagerotate

This module has been disabled.

import

Import a page from another wiki, or from an XML file.

jsonconfig

Allows direct access to JsonConfig subsystem.

languagesearch

Search for language names in any script.

linkaccount

Link an account from a third-party provider to the current user.

login

Log in and get authentication cookies.

logout

Log out and clear session data.

managetags

Perform management tasks relating to change tags.

markfortranslation

Mark a page for translation

massmessage

Send a message to a list of pages.

mergehistory

Merge page histories.

move

Move a page.

newslettersubscribe

Subscribe to or unsubscribe from a newsletter.

opensearch

Search the wiki using the OpenSearch protocol.

options

Change preferences of the current user.

paraminfo

Obtain information about API modules.

parse

Parses content and returns parser output.

patrol

Patrol a page or revision.

protect

Change the protection level of a page.

purge

Purge the cache for the given titles.

query

Fetch data from and about MediaWiki.

removeauthenticationdata

Remove authentication data for the current user.

resetpassword

Send a password reset email to a user.

revisiondelete

Delete and undelete revisions.

rollback

Undo the last edit to the page.

rsd

Export an RSD (Really Simple Discovery) schema.

searchtranslations

Search translations.

setglobalaccountstatus

Hide or lock (or unhide or unlock) a global user account.

setnotificationtimestamp

Update the notification timestamp for watched pages.

setpagelanguage

Change the language of a page.

shortenurl

Shorten a long URL into a shorter one.

sitematrix

Get Wikimedia sites list.

spamblacklist

Validate one or more URLs against the spam block list.

streamconfigs

Exposes event stream config. Returns only format=json with formatversion=2.

strikevote

Allows admins to strike or unstrike a vote.

tag

Add or remove change tags from individual revisions or log entries.

templatedata

Fetch data stored by the TemplateData extension.

thank

Send a thank-you notification to an editor.

threadaction

Allows actions to be taken on threads and posts in threaded discussions.

titleblacklist

Validate a page title, filename, or username against the TitleBlacklist.

torblock

Check if an IP address is blocked as a Tor exit node.

transcodereset

Users with the 'transcode-reset' right can reset and re-run a transcode job.

translationaids

Query all translations aids.

translationreview

Mark translations reviewed.

translationstats

Fetch translation statistics

ttmserver

Query suggestions from translation memories.

unblock

Unblock a user.

undelete

Undelete revisions of a deleted page.

unlinkaccount

Remove a linked third-party account from the current user.

upload

Upload a file, or get the status of pending uploads.

userrights

Change a user's group membership.

validatepassword

Validate a password against the wiki's password policies.

watch

Add or remove pages from the current user's watchlist.

webapp-manifest

Returns a webapp manifest.

webauthn

API Module to communicate between server and client during registration/authentication process.

wikilove

Give WikiLove to another user.

bouncehandler

Internal. Receive a bounce email and process it to handle the failing recipient.

categorytree

Internal. Internal module for the CategoryTree extension.

chartinfo

Internal. Retrieve current count of how many unique Chart page usages there are. Multiple uses of the same chart on the same page are considered a single use.

cirrus-check-sanity

Internal. Reports on the correctness of a range of page ids in the search index

cirrus-config-dump

Internal. Dump of CirrusSearch configuration.

cirrus-mapping-dump

Internal. Dump of CirrusSearch mapping for this wiki.

cirrus-profiles-dump

Internal. Dump of CirrusSearch profiles for this wiki.

cirrus-settings-dump

Internal. Dump of CirrusSearch settings for this wiki.

collection

Internal. API module for performing various operations on a wiki user's collection.

cspreport

Internal. Used by browsers to report violations of the Content Security Policy. This module should never be used, except when used automatically by a CSP compliant web browser.

discussiontoolscompare

Internal. Get information about comment changes between two page revisions.

discussiontoolspageinfo

Internal. Returns metadata required to initialize the discussion tools.

discussiontoolspreview

Internal. Preview a message on a discussion page.

editcheckreferenceurl

Internal. Check the status of a URL for use as a reference.

fancycaptchareload

Internal. Get a new FancyCaptcha.

focusareaedit

Internal. Create or update a focus area in the Community Wishlist.

jsondata

Internal. Retrieve localized JSON data.

jsontransform

Internal. Retrieve JSON data transformed by a Lua function.

managegroupsynchronizationcache

Internal. Manage group synchronization cache.

managemessagegroups

Internal. Add a message as a rename of an existing message or a new message in the group during imports

messagegroupsubscription

Internal. Message group subscription related operations

oathvalidate

Internal. Validate a two-factor authentication (OATH) token.

parser-migration

Internal. Parse a page with two different parser configurations.

readinglists

Internal. Reading list write operations.

sanitize-mapdata

Internal. Performs data validation for Kartographer extension

scribunto-console

Internal. Internal module for servicing XHR requests from the Scribunto console.

securepollauth

Internal. Allows a remote wiki to authenticate users before granting access to vote in the election.

stashedit

Internal. Prepare an edit in shared cache.

timedtext

Internal. Provides timed text content for usage by <track> elements

translationcheck

Internal. Validate translations.

translationentitysearch

Internal. Search for message groups and messages

ulslocalization

Internal. Get the localization of ULS in the given language.

ulssetlang

Internal. Update user's preferred interface language.

visualeditor

Internal. Returns HTML5 for a page from the Parsoid service.

visualeditoredit

Internal. Save an HTML5 page to MediaWiki (converted to wikitext via the Parsoid service).

wikimediaeventsblockededit

Internal. Log information about blocked edit attempts

wishedit

Internal. Create or update a wish in the Community Wishlist.

wishlistvote

Internal. Support a wish or focus area in the Community Wishlist.

The format of the output.

json

Output data in JSON format.

jsonfm

Output data in JSON format (pretty-print in HTML).

none

Output nothing.

php

Output data in serialized PHP format.

phpfm

Output data in serialized PHP format (pretty-print in HTML).

rawfm

Output data, including debugging elements, in JSON format (pretty-print in HTML).

xml

Output data in XML format.

xmlfm

Output data in XML format (pretty-print in HTML).

Maximum lag can be used when MediaWiki is installed on a database replicated cluster. To save actions causing any more site replication lag, this parameter can make the client wait until the replication lag is less than the specified value. In case of excessive lag, error codemaxlag is returned with a message likeWaiting for $host: $lag seconds lagged.
SeeManual: Maxlag parameter for more information.

Set thes-maxage HTTP cache control header to this many seconds. Errors are never cached.

Set themax-age HTTP cache control header to this many seconds. Errors are never cached.

Verify that the user is logged in (including possibly as a temporary user) if set touser,not logged in if set toanon, or has the bot user right ifbot.

Verify the current user is the named user.

Any value given here will be included in the response. May be used to distinguish requests.

Include the hostname that served the request in the results.

Include the current timestamp in the result.

Include the languages used foruselang anderrorlang in the result.

When accessing the API using a cross-domain AJAX request (CORS), set this to the originating domain. This must be included in any pre-flight request, and therefore must be part of the request URI (not the POST body).

For authenticated requests, this must match one of the origins in theOrigin header exactly, so it has to be set to something likehttps://en.wikipedia.org orhttps://meta.wikimedia.org. If this parameter does not match theOrigin header, a 403 response will be returned. If this parameter matches theOrigin header and the origin is allowed, theAccess-Control-Allow-Origin andAccess-Control-Allow-Credentials headers will be set.

For non-authenticated requests, specify the value*. This will cause theAccess-Control-Allow-Origin header to be set, butAccess-Control-Allow-Credentials will befalse and all user-specific data will be restricted.

When accessing the API using a cross-domain AJAX request (CORS) and using a session provider that is safe against cross-site request forgery (CSRF) attacks (such as OAuth), use this instead oforigin=* to make the request authenticated (i.e., not logged out). This must be included in any pre-flight request, and therefore must be part of the request URI (not the POST body).

Note that most session providers, including standard cookie-based sessions, do not support authenticated CORS and cannot be used with this parameter.

Language to use for message translations.action=query&meta=siteinfo&siprop=languages returns a list of language codes. You can specifyuser to use the current user's language preference orcontent to use this wiki's content language.

Variant of the language. Only works if the base language supports variant conversion.

Format to use for warning and error text output

plaintext

Wikitext with HTML tags removed and entities replaced.

wikitext

Unparsed wikitext.

html

HTML

raw

Message key and parameters.

none

No text output, only the error codes.

bc

Format used prior to MediaWiki 1.29.errorlang anderrorsuselocal are ignored.

Language to use for warnings and errors.action=query&meta=siteinfo&siprop=languages returns a list of language codes. Specifycontent to use this wiki's content language oruselang to use the same value as theuselang parameter.

If given, error texts will use locally-customized messages from the MediaWiki namespace.

When accessing the API using a cross-domain AJAX request (CORS), use this to authenticate as the current SUL user. Useaction=centralauthtoken on this wiki to retrieve the token, before making the CORS request. Each token may only be used once, and expires after 10 seconds. This should be included in any pre-flight request, and therefore should be included in the request URI (not the POST body).