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HTTP METHODS · 2026

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HTTP METHODS · 2026

ten methods per RFC 9110, 5789 and 10008: which are safe, which are idempotent, which can be retried

Built as a memo rather than a table: the thing worth hanging it up for reads across the room, with the full reference in smaller type below it.

Three sizes in one archive — from a sheet on the fridge to a poster on the wall.

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Formats
A4 · A3 · A2
What you get
Print-ready PDFs, one per size, with every letterform converted to outlines — nothing to install, nothing to shift.
Subject
code · beginners · reference · study

Methods, descriptions and properties follow RFC 9110 «HTTP Semantics» (IETF, 2022), Table 4 and §9.2; PATCH follows RFC 5789 (2010); QUERY follows RFC 10008 (2026). A server is required to support only GET and HEAD; every other method is optional (RFC 9110 §9.1).

THE POST CACHE STAYED ON PAPER

POST is cacheable by specification: RFC 9110 defines caching semantics for GET, HEAD and POST — and admits in the same sentence that “the overwhelming majority of cache implementations only support GET and HEAD.” The POST cache stayed on paper.

PATCH is not even from this document: it was added by a separate RFC 5789 in 2010, and it is neither safe nor idempotent. QUERY took the same road: its own RFC 10008, June 2026 — the first new method in sixteen years.

On the sheet

  • Methods, descriptions and properties follow RFC 9110 «HTTP Semantics» (IETF, 2022), Table 4 and §9.2; PATCH follows RFC 5789 (2010); QUERY follows RFC 10008 (2026). A server is required to support only GET and HEAD; every other method is optional (RFC 9110 §9.1).
  • Colour carries meaning, but meaning never rests on colour alone — the sheet reads in black and white.
  • Nothing about how it was made: the sheet carries only what the reader needs.

Printing

  • Three sizes in the archive: A4 — 210×297 mm, A3 — 297×420 mm, A2 — 420×594 mm.
  • All text is converted to outlines. No fonts to install, and nothing shifts on another machine.
  • White background and sparing fills — it prints on a home printer without draining the cartridge.
  • Margins of at least 10 mm: a home printer cannot print to the edge.
  • No stroke thinner than 0.3 mm, so nothing disappears in print.

Why the numbers can be trusted. Every countable number here is computed from data rather than typed in, and the sheet must pass 8 independent checks before it is allowed to build — how many items there are, the order they come in, and the claim in the highlighted box itself. If one fails, there is no file.

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