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openapi: 3.0.3
info:
title: MediaWiki Action articles snapshots API
description: 'The MediaWiki Action API is the original programmatic interface to MediaWiki, exposed under /w/api.php on every MediaWiki installation. All operations dispatch via the ?action= query parameter. The API supports JSON, XML, and PHP serialization; JSON is the recommended format.
Wikimedia projects strongly recommend serial (not parallel) calls, the use of maxlag for non-interactive jobs, and a contactable User-Agent header. The Action API remains the primary write interface (edit, upload, login, patrol) even where the Core REST API is also available.'
version: '1.45'
x-generated-from: documentation
x-source-url: https://www.mediawiki.org/wiki/API:Main_page
x-last-validated: '2026-05-29'
contact:
name: Wikimedia Foundation
url: https://www.mediawiki.org/wiki/API:Etiquette
license:
name: CC BY-SA 4.0
url: https://creativecommons.org/licenses/by-sa/4.0/
servers:
- url: https://en.wikipedia.org/w
description: English Wikipedia
- url: https://{lang}.wikipedia.org/w
description: Per-language Wikipedia
variables:
lang:
default: en
description: Language code
- url: https://commons.wikimedia.org/w
description: Wikimedia Commons
- url: https://www.wikidata.org/w
description: Wikidata
- url: https://www.mediawiki.org/w
description: MediaWiki.org
tags:
- name: snapshots
description: Snapshot API
externalDocs:
description: enterprise docs - snapshot api
url: https://enterprise.wikimedia.com/docs/snapshot/
paths:
/v2/snapshots:
summary: Snapshots Available
description: Returns a list of available project snapshots by namespace. Includes identifiers, file sizes and other relevant metadata.
get:
tags:
- snapshots
parameters:
- in: query
name: fields
description: Select which fields to receive in your response, using JSON dot notation.
schema:
type: array
items:
type: string
example: name
- in: query
name: filters
description: Select which projects and languages to receive in your response.
schema:
type: array
items:
$ref: '#/components/schemas/filter'
responses:
200:
description: OK
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/snapshot'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '[{"identifier": "string","version": "string","date_modified": "string","is_part_of": {"identifier": "string"},"in_language": {"identifier": "string"},"namespace": {"identifier": integer},"size": {"value": float,"unit_text": "string"},"chunks": ["string"]}]
'
401:
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 401}
'
403:
description: Forbidden
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 403}
'
422:
description: Unprocessable Entity
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":422}
'
500:
description: Internal Server Error, Retry Request
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":500}
'
x-microcks-operation:
delay: 0
dispatcher: FALLBACK
post:
tags:
- snapshots
requestBody:
content:
application/json:
schema:
type: object
properties:
fields:
type: array
example: '["name","identifier"]'
description: Select which fields to receive in your response, using JSON dot notation.
items:
type: string
filters:
type: array
description: Select which projects and languages to receive in your response.
items:
$ref: '#/components/schemas/filter'
example: '[{"field": "namespace.identifier", "value": 0}]
'
responses:
200:
description: OK
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/snapshot'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '[{"identifier": "string","version": "string","date_modified": "string","is_part_of": {"identifier": "string"},"in_language": {"identifier": "string"},"namespace": {"identifier": integer},"size": {"value": float,"unit_text": "string"},"chunks": ["string"]}]
'
401:
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 401}
'
403:
description: Forbidden
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 403}
'
422:
description: Unprocessable Entity
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":422}
'
500:
description: Internal Server Error, Retry Request
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":500}
'
x-microcks-operation:
delay: 0
dispatcher: FALLBACK
/v2/snapshots/{identifier}:
summary: Snapshot Info
description: Information on a specific Snapshot bundle. Includes identifiers, file sizes and other relevant metadata.
get:
tags:
- snapshots
parameters:
- in: path
name: identifier
description: 'Snapshot identifier looks like `<language><project_name>_namespace_<number>`, examples: `dewiki_namespace_14` downloads categories used in de.wikipedia.org, `enwiki_namespace_0` downloads articles used in en.wikipedia.org, `frwikivoyage_namespace_10` downloads wikitext templates used in fr.wikivoyage.org. See our Metadata Endpoints for language, projects, and namespaces available for configuration.'
required: true
schema:
type: string
minLength: 1
- in: query
name: fields
description: Select which fields to receive in your response, using JSON dot notation.
schema:
type: array
items:
type: string
example: name
responses:
200:
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/snapshot'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '[{"identifier": "string","version": "string","date_modified": "string","is_part_of": {"identifier": "string"},"in_language": {"identifier": "string"},"namespace": {"identifier": integer},"size": {"value": float,"unit_text": "string"},"chunks": ["string"]}]
'
401:
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 401}
'
403:
description: Forbidden
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 403}
'
404:
description: Not Found
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 404}
'
422:
description: Unprocessable Entity
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":422}
'
500:
description: Internal Server Error, Retry Request
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":500}
'
x-microcks-operation:
delay: 0
dispatcher: FALLBACK
post:
tags:
- snapshots
parameters:
- in: path
name: identifier
description: 'Snapshot identifier looks like `<language><project_name>_namespace_<number>`, examples: `dewiki_namespace_14` downloads categories used in de.wikipedia.org, `enwiki_namespace_0` downloads articles used in en.wikipedia.org, `frwikivoyage_namespace_10` downloads wikitext templates used in fr.wikivoyage.org. See our Metadata Endpoints for language, projects, and namespaces available for configuration.'
required: true
schema:
type: string
minLength: 1
requestBody:
content:
application/json:
schema:
type: object
properties:
fields:
type: array
example: '["name","identifier"]'
description: Select which fields to receive in your response, using JSON dot notation.
items:
type: string
responses:
200:
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/snapshot'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '[{"identifier": "string","version": "string","date_modified": "string","is_part_of": {"identifier": "string"},"in_language": {"identifier": "string"},"namespace": {"identifier": integer},"size": {"value": float,"unit_text": "string"},"chunks": ["string"]}]
'
401:
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 401}
'
403:
description: Forbidden
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 403}
'
404:
description: Not Found
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 404}
'
422:
description: Unprocessable Entity
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":422}
'
500:
description: Internal Server Error, Retry Request
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":500}
'
x-microcks-operation:
delay: 0
dispatcher: FALLBACK
/v2/snapshots/{identifier}/download:
summary: Snapshot Download
description: Downloadable bundle of all current revisions in a specified project and namespace. Updated daily at 12:00 UTC.
head:
summary: Wikimedia Enterprise Project Snapshot Headers
description: Set of headers that describe the snapshot download.
tags:
- snapshots
parameters:
- in: path
name: identifier
description: 'Snapshot identifier looks like `<language><project_name>_namespace_<number>`, examples: `dewiki_namespace_14` downloads categories used in de.wikipedia.org, `enwiki_namespace_0` downloads articles used in en.wikipedia.org, `frwikivoyage_namespace_10` downloads wikitext templates used in fr.wikivoyage.org. See our Metadata Endpoints for language, projects, and namespaces available for configuration.'
required: true
schema:
type: string
minLength: 1
responses:
200:
description: OK
headers:
Accept-Ranges:
schema:
type: string
description: HTTP response header is a marker used by the server to advertise its support for partial requests.
Last-Modified:
schema:
type: string
description: Response HTTP header contains a date and time when the origin server believes the resource was last modified.
Content-Length:
schema:
type: string
description: Header indicates the size of the message body, in bytes, sent to the recipient.
ETag:
schema:
type: string
description: Entity tag - HTTP response header is an identifier for a specific version of a resource.
Content-Disposition:
schema:
type: string
description: Header indicating if the content is expected to be displayed in the browser or as an attachment, that is downloaded and saved locally.
Content-Encoding:
schema:
type: string
description: Lists any encodings that have been applied to the representation (message payload), and in what order.
Content-Type:
schema:
type: string
description: Indicates the original media type of the resource (prior to any content encoding applied for sending).
Expires:
schema:
type: string
description: Contains the date/time after which the response is considered expired.
401:
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 401}
'
403:
description: Forbidden
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 403}
'
404:
description: Not Found
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 404}
'
422:
description: Unprocessable Entity
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":422}
'
500:
description: Internal Server Error, Retry Request
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":500}
'
x-microcks-operation:
delay: 0
dispatcher: FALLBACK
get:
tags:
- snapshots
parameters:
- in: path
name: identifier
description: 'Snapshot identifier looks like `<language><project_name>_namespace_<number>`, examples: `dewiki_namespace_14` downloads categories used in de.wikipedia.org, `enwiki_namespace_0` downloads articles used in en.wikipedia.org, `frwikivoyage_namespace_10` downloads wikitext templates used in fr.wikivoyage.org. See our Metadata Endpoints for language, projects, and namespaces available for configuration.'
required: true
schema:
type: string
minLength: 1
- in: header
name: Range
description: The Range HTTP request header indicates the part of a document that the server should return.
schema:
type: string
responses:
200:
description: OK
content:
application/gzip:
schema:
type: string
format: binary
401:
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 401}
'
403:
description: Forbidden
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 403}
'
404:
description: Not Found
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 404}
'
422:
description: Unprocessable Entity
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":422}
'
500:
description: Internal Server Error, Retry Request
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":500}
'
x-microcks-operation:
delay: 0
dispatcher: FALLBACK
/v2/snapshots/{snapshot_identifier}/chunks:
summary: Snapshot Chunks Available
description: Returns a list of available chunks for a specific snapshot. Includes chunk identifiers and other relevant metadata.
get:
tags:
- snapshots
parameters:
- in: path
name: snapshot_identifier
description: 'Snapshot identifier looks like `<language><project_name>_namespace_<number>`, examples: `dewiki_namespace_14` downloads categories used in de.wikipedia.org, `enwiki_namespace_0` downloads articles used in en.wikipedia.org, `frwikivoyage_namespace_10` downloads wikitext templates used in fr.wikivoyage.org. See our Metadata Endpoints for language, projects, and namespaces available for configuration.'
required: true
schema:
type: string
minLength: 1
- in: query
name: fields
description: Select which fields to receive in your response, using JSON dot notation.
schema:
type: array
items:
type: string
example: name
- in: query
name: filters
description: Select which projects and languages to receive in your response.
schema:
type: array
items:
$ref: '#/components/schemas/filter'
responses:
200:
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/snapshot'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '[{"identifier": "string","version": "string","date_modified": "string","is_part_of": {"identifier": "string"},"in_language": {"identifier": "string"},"namespace": {"identifier": integer},"size": {"value": float,"unit_text": "string"},"chunks": ["string"]}]
'
401:
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 401}
'
403:
description: Forbidden
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 403}
'
404:
description: Not Found
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 404}
'
422:
description: Unprocessable Entity
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":422}
'
500:
description: Internal Server Error, Retry Request
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":500}
'
x-microcks-operation:
delay: 0
dispatcher: FALLBACK
post:
tags:
- snapshots
parameters:
- in: path
name: snapshot_identifier
description: 'Snapshot identifier looks like `<language><project_name>_namespace_<number>`, examples: `dewiki_namespace_14` downloads categories used in de.wikipedia.org, `enwiki_namespace_0` downloads articles used in en.wikipedia.org, `frwikivoyage_namespace_10` downloads wikitext templates used in fr.wikivoyage.org. See our Metadata Endpoints for language, projects, and namespaces available for configuration.'
required: true
schema:
type: string
minLength: 1
requestBody:
content:
application/json:
schema:
type: object
properties:
fields:
type: array
example: '["name","identifier"]'
description: Select which fields to receive in your response, using JSON dot notation.
items:
type: string
filters:
type: array
description: Select which projects and languages to receive in your response.
items:
$ref: '#/components/schemas/filter'
example: '[{"field": "identifier","value": "hiwiki_namespace_0_chunk_0"}]'
responses:
200:
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/snapshot'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '[{"identifier": "string","version": "string","date_modified": "string","is_part_of": {"identifier": "string"},"in_language": {"identifier": "string"},"namespace": {"identifier": integer},"size": {"value": float,"unit_text": "string"},"chunks": ["string"]}]
'
401:
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 401}
'
403:
description: Forbidden
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 403}
'
404:
description: Not Found
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 404}
'
422:
description: Unprocessable Entity
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":422}
'
500:
description: Internal Server Error, Retry Request
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status":500}
'
x-microcks-operation:
delay: 0
dispatcher: FALLBACK
/v2/snapshots/{snapshot_identifier}/chunks/{identifier}:
summary: Snapshot Chunk Info
description: Information on a specific chunk of a snapshot. Includes chunk identifier, size, and other relevant metadata.
get:
tags:
- snapshots
parameters:
- in: path
name: snapshot_identifier
description: 'Snapshot identifier looks like `<language><project_name>_namespace_<number>`, examples: `dewiki_namespace_14` downloads categories used in de.wikipedia.org, `enwiki_namespace_0` downloads articles used in en.wikipedia.org, `frwikivoyage_namespace_10` downloads wikitext templates used in fr.wikivoyage.org. See our Metadata Endpoints for language, projects, and namespaces available for configuration.'
required: true
schema:
type: string
minLength: 1
- in: path
name: identifier
description: Chunk identifier or index.
required: true
schema:
type: string
minLength: 1
- in: query
name: fields
description: Select which fields to receive in your response, using JSON dot notation.
schema:
type: array
items:
type: string
example: name
responses:
200:
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/snapshot'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '[{"identifier": "string","version": "string","date_modified": "string","is_part_of": {"identifier": "string"},"in_language": {"identifier": "string"},"namespace": {"identifier": integer},"size": {"value": float,"unit_text": "string"},"chunks": ["string"]}]
'
401:
description: Unauthorized
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 401}
'
403:
description: Forbidden
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
format: ndjson
example: '{"message":"string","status": 403}
'
404:
description: Not Found
content:
application/json:
schema:
$ref: '#/components/schemas/error'
application/x-ndjson:
schema:
type: string
# --- truncated at 32 KB (46 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/wikipedia/refs/heads/main/openapi/wikipedia-snapshots-api-openapi.yml