Add Brand Kit Image
Attach an uploaded image to a brand kit (ENG-2466).
Multipart-upload flow: the caller first POST /v1/uploads their file
and receives a file_* id (the response’s id field), then calls this
endpoint with that id as file_id to associate the image with the brand
kit (logo / reference / asset). A bare UUID is also accepted for back-compat
with older integrations.
Returns 404 not_found if the brand kit does not exist, has been
deleted, or the caller lacks team access — collapsed like the sibling
endpoints so the write path does not leak existence of brand kits in
other teams. An unusable file_id (missing, deleted, or outside the
kit’s team) is a 400.
Authorizations
API key from Settings > Developer > REST API
Headers
Calendar-dated API version pin. New integrations should pin 2026-05-01 to opt into the newest response shapes. For back-compat the server also accepts requests with no header and resolves them to the current default (today: 2026-04-12); that default advances on each sunset date. Any unsupported value returns 400 unsupported_version.
2026-04-12, 2026-05-01 "2026-05-01"
Path Parameters
Prefixed bk_ wire ID (Crockford base32 body) — the canonical, recommended form. For back-compat, a bare UUID string is also accepted in both path parameters and JSON request bodies (older integrations that stored raw UUIDs keep working). Both are permanent, supported inputs.
^bk_[0-9A-HJKMNP-TV-Za-hjkmnp-tv-z]{26}$"bk_01HT9WK8N3M2J4A5Z6P7Q8R9TV"
Body
Request body for POST /v1/brand-kits/{id}/images (ENG-2466).
The file_ ID returned as id by a prior POST /v1/uploads response. A bare UUID (the form older integrations stored) is also accepted for back-compat.
^file_[0-9A-HJKMNP-TV-Za-hjkmnp-tv-z]{26}$"file_01HT9WK8N3M2J4A5Z6P7Q8R9TV"
How the image is used. 'logo' gets special downstream treatment; 'reference' is a style hint visible to the design agent; 'asset' is includable in designs.
logo, reference, asset "logo"
Optional human-readable label.
"Dark mode logo"
Response
Successful Response
The response is of type Response Addbrandkitimage · object.