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API · problem · HTTP 400

Malformed request

This page is what the type field of the error points at. Every answer this API refuses carries one, and it is a stable address rather than a version of the docs.

The refusalbad-request
When it happens
A parameter is missing, blank, out of range, or not a value this endpoint accepts. A blank parameter is malformed rather than zero: ?units= means a field somebody meant to fill.
What to do
The detail names the parameter and, where the set is finite, lists what it accepts. Every enumeration in GET /v1/openapi.json is derived from the corpus, so it cannot be stale.
The shape of the answerRFC 9457

Problem details: type, title, status and detail, plus whatever the individual failure can usefully add. The detail is written for the person reading the log, and names the parameter or the id that caused it.

The fields every problem carries
typeThis page’s address. Stable.
titleMalformed request
status400
detailWhat went wrong, in this request.

The full list of failures, with the schema, is in the API documentation.