Bru Markup Language (.bru)
Bru is Bruno's plain-text domain-specific markup language. Each request is stored as a .bru file capturing the HTTP method, URL, query params, headers, body, authentication, scripts, tests, assertions, and variables, so a collection is a folder of human-readable text files reviewable in Git pull requests. A logical artifact/file format modeled as a capability area - not an HTTP endpoint.
Not an API. Bruno publishes no API for this. It is a product area, listed for completeness, and it is not counted in the provider's API total.