Custom field values keyed by the field's project-scoped internal_id
(see GET /custom_field). Values are always scalar strings; arrays,
objects or non-scalars are rejected.
| Field type | Value format | Example |
|---|
string, text | Plain string | "hello" |
number | Numeric string | "42" |
url | Valid URL | "https://qase.io" |
datetime | Absolute date (ISO 8601 recommended) | "2026-04-29T15:00:00Z" |
selectbox, radio | Option id as string | "1" |
multiselect | Comma-separated option ids (no spaces) | "1,2,3" |
checkbox | "1" to check, "" to uncheck | "1" |
user | Team member internal_id as string | "42" |
Partial update: only fields present in the payload are validated; required
fields not included are not enforced. Send "" to clear a value. Unknown
internal_ids are rejected; option-based values must reference an existing
option.
Note: a required checkbox without a default cannot be unchecked via the API
— set a default or clear required in workspace settings.
