Creates a human-authored comment on an item. The comment is attributed to the user represented by the access token and is displayed in the item timeline with an API-origin indicator.
Only a personal access token with write scope and access to the item's project is supported. Project Access Tokens and service tokens are rejected.
Comment text supports the same Markdown and mention behavior as comments created in the Rollbar UI. The encoded comment and its stored metadata must fit in the existing 65,535-byte item-comment data field.
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Invalid item ID, project ID, or JSON body.
The token lacks write scope, is not a personal access token, or its user cannot comment in the project.
The item does not exist in the supplied project.
The comment exceeds the supported storage limit.
Content-Type must be application/json.
The comment is missing, not a string, or contains only whitespace.