400 Bad Request

HTTP response status code
Thing http_status_code Q64728482
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400 Bad Request

Summary

400 Bad Request is a HTTP status code[1]. It draws 3 Wikipedia views per month (http_status_code category, ranking #9 of 12).[2]

Key Facts

  • 400 Bad Request's instance of is recorded as HTTP status code[3].
  • 400 Bad Request's follows is recorded as 308 Permanent Redirect[4].
  • 400 Bad Request's followed by is recorded as 401 Unauthorized[5].
  • 400 Bad Request's part of the series is recorded as HTTP status code[6].
  • 400 Bad Request's described at URL is recorded as https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.1[7].
  • 400 Bad Request's described by source is recorded as RFC 7231: Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content[8].
  • 400 Bad Request's described by source is recorded as RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1[9].
  • 400 Bad Request's native label is recorded as Bad Request[10].
  • 400 Bad Request's native label is recorded as bad request[11].
  • 400 Bad Request's code is recorded as 400[12].
  • 400 Bad Request's NicoNicoPedia ID is recorded as 400 - bad request[13].
  • 400 Bad Request's Mozilla Developer Network article is recorded as Web/HTTP/Status/400[14].

Why It Matters

400 Bad Request draws 3 Wikipedia views per month (http_status_code category, ranking #9 of 12).[2]

References

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

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . RFC 7231: Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content. wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . RFC 7231: Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content. wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . wikidata.org.

Class ancestry

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

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.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). 400 Bad Request. Retrieved May 3, 2026, from https://4ort.xyz/entity/400-bad-request
MLA “400 Bad Request.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/400-bad-request.
BibTeX @misc{4ortxyz_400-bad-request_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{400 Bad Request}}, year = {2026}, url = {https://4ort.xyz/entity/400-bad-request}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 400 Bad Request — https://4ort.xyz/entity/400-bad-request (retrieved 2026-05-03)

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