Editing the library
Change what the library already holds: an asset's words and tags, its values of the organization's custom fields, and its thumbnail — then show it in your pages.
Edit an asset: its words and its tags
Change an asset's title, description, excerpt, copyright notice, language, reference and SEO texts with PATCH /v1/assets/{asset_id}, and its tags by their words with PUT …/tags — without overwriting what you do not send.
Custom fields
List your organization's custom fields with GET /v1/custom-fields and the options of a choice field, and write an asset's values with PATCH /v1/assets/{asset_id}/custom-fields, in the shape each type gives them.
An asset's thumbnail
Choose an asset's thumbnail by sending it with PUT /v1/assets/{asset_id}/thumbnail, then show it in your pages with thumbnail_url: a stable, anonymous address to put as it is in an <img>, in several formats and sizes.