ActivityPub

open decentralized social networking protocol
CreativeWork open_standard Q40463886
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ActivityPub

Summary

ActivityPub is an open standard[1]. ActivityPub draws 159 Wikipedia views per month (open_standard category, ranking #6 of 17).[2]

Key Facts

  • ActivityPub authored Christine Lemmer-Webber[3].
  • ActivityPub authored Evan Prodromou[4].
  • ActivityPub's image is recorded as ActivityPub-tutorial-image.png[5].
  • ActivityPub's instance of is recorded as open standard[6].
  • ActivityPub's instance of is recorded as computer network protocol[7].
  • ActivityPub's instance of is recorded as W3C Recommendation[8].
  • ActivityPub's instance of is recorded as guideline[9].
  • ActivityPub's logo image is recorded as ActivityPub-logo.svg[10].
  • ActivityPub's developer is recorded as World Wide Web Consortium[11].
  • ActivityPub's software version identifier is recorded as 2017[12].
  • ActivityPub's software version identifier is recorded as 2016-01-28[13].
  • ActivityPub's software version identifier is recorded as 23.01.2018[14].
  • ActivityPub's Commons category is recorded as ActivityPub[15].
  • +2016-01-28T00:00:00Z marks the founding of ActivityPub[16].
  • ActivityPub's publication date is recorded as +2018-01-23T00:00:00Z[17].
  • ActivityPub's official website is recorded as https://activitypub.rocks/[18].
  • ActivityPub's topic's main category is recorded as Category:ActivityPub[19].
  • ActivityPub's work available at URL is recorded as https://www.w3.org/TR/activitypub/[20].
  • ActivityPub's media type is recorded as application/activity+json[21].
  • ActivityPub's source code repository URL is recorded as https://github.com/w3c/activitypub[22].
  • ActivityPub's replaces is recorded as OStatus[23].
  • ActivityPub's official name is recorded as {'lang': 'en', 'text': 'ActivityPub'}[24].
  • ActivityPub's used by is recorded as Mastodon[25].
  • ActivityPub's used by is recorded as Q50938515[26].
  • ActivityPub's used by is recorded as Nextcloud[27].

Body

Authorship and Creation

Authored works include Christine Lemmer-Webber[3], a software engineer[28], b. 1984[29], of United States[30] and Evan Prodromou[4], an engineer[31], b. 1968[32], of United States[33], awarded the O'Reilly Open Source Award[34].

Publication

ActivityPub's publication date is recorded as +2018-01-23T00:00:00Z[17].

Why It Matters

ActivityPub draws 159 Wikipedia views per month (open_standard category, ranking #6 of 17).[2] ActivityPub has Wikipedia articles in 19 language editions, a strong signal of global cultural recognition.[35]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [5] . wikidata.org.
  2. [6] . wikidata.org.
  3. [7] . wikidata.org.
  4. [8] . w3.org. Retrieved . w3.org. Provenance: wikidata.org.
  5. [9] . wikidata.org.
  6. [3] . w3.org. w3.org. Provenance: wikidata.org.
  7. [4] . w3.org. w3.org. Provenance: wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . w3.org. w3.org. Provenance: wikidata.org.
  11. [13] . w3.org. w3.org. Provenance: wikidata.org.
  12. [14] . w3.org. w3.org. Provenance: wikidata.org.
  13. [15] . wikidata.org.
  14. [16] . w3.org. w3.org. Provenance: wikidata.org.
  15. [17] . w3.org. w3.org. Provenance: wikidata.org.
  16. [18] . wikidata.org.
  17. [19] . wikidata.org.
  18. [20] . wikidata.org.
  19. [21] . w3.org. w3.org. Provenance: wikidata.org.
  20. [22] . wikidata.org.
  21. [23] . wikidata.org.
  22. [24] . GitHub repository. Retrieved . w3.org. Provenance: wikidata.org.
  23. [25] . github.com. github.com. Provenance: wikidata.org.
  24. [26] . wikidata.org.
  25. [27] . nextcloud.com. nextcloud.com. Provenance: wikidata.org.

Inline context (facts about related entities)

  1. [28] . Wikidata. wikidata.org. → on this site
  2. [29] . Wikidata. wikidata.org. → on this site
  3. [30] . Wikidata. wikidata.org. → on this site
  4. [31] . Wikidata. wikidata.org. → on this site
  5. [32] . Wikidata. wikidata.org. → on this site
  6. [33] . Wikidata. wikidata.org. → on this site
  7. [34] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [35] . Wikidata sitelinks. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). ActivityPub. Retrieved May 3, 2026, from https://4ort.xyz/entity/activitypub
MLA “ActivityPub.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/activitypub.
BibTeX @misc{4ortxyz_activitypub_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{ActivityPub}}, year = {2026}, url = {https://4ort.xyz/entity/activitypub}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): ActivityPub — https://4ort.xyz/entity/activitypub (retrieved 2026-05-03)

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