Create Brand Glossary
Creates a brand glossary in your workspace. Pass the returned brand_glossary_id when creating a video or translation to apply it.
name must be unique within your workspace, compared without regard to case; a duplicate returns 409. terms may be omitted to create an empty glossary you fill in later with PATCH /v3/brand-glossaries/.
Pronunciations affect generated audio only — a term keeps its original spelling in captions and subtitles. Translation rules are managed in the HeyGen web app and cannot be set here.
Authorizations
HeyGen API key. Obtain from your HeyGen dashboard.
Headers
Optional client-supplied key for safely retrying mutations. Subsequent calls within 24 hours that share this key replay the original response — even if the request body differs slightly (a warning is logged). A retry that arrives while the original is still in flight gets a 409 request_in_progress. Keys must be 1–255 characters from [A-Za-z0-9_:.-]; a UUID is a safe default. Scope is per-endpoint and per-resource: the same key on a different route or path parameter is independent.
1 - 255^[A-Za-z0-9_\-:.]{1,255}$Body
Request body for POST /v3/brand-glossaries.
Display name for the glossary. Surrounding whitespace is removed, and the trimmed name must be 1-64 characters and unique within your workspace, compared without regard to case.
1 - 64Term-to-pronunciation mappings. Omit it, or pass an empty array, to create a glossary you fill in later.
Response
Created.
A single brand glossary with its full term list (GET /v3/brand-glossaries/{id}).

