Walking Through the HTTP Status Codes Dataset

The HTTP status codes dataset is the most frequently fetched item on YJTOON. It is also a good example of the design rules we apply to every reference table.

What is in it

• Every code defined in IANA's HTTP Status Code Registry, current to the last sync.
• Standard name, reason phrase, RFC reference, and a one-line description.
• A coarse category (informational, success, redirect, client error, server error) for quick filtering.

What is not in it

• Non-standard codes used by specific frameworks or proxies.
• Localised reason phrases. Only the English IANA name is published.
• Sample responses. Those are deliberately out of scope for a code-level reference.

How to extend it

Open an issue with the IANA reference and the field you want added. Extensions are gated on a stable upstream source, not on a maintainer's opinion.

How to consume it in a prompt

HTTP status codes (source: yjtoon.com/dataset/http-status-codes-complete):

Followed by the TOON table. Most models can answer "what does 418 mean" with the table present, and refuse or hedge without it.