Bruno is an open-source API client that stores collections as files. The generated collection uses Bruno's native classic .bru format and is created from the OpenAPI definition with npm run api:bruno at api/rest/generated/bruno/. The command installs Bruno's separately pinned toolchain from tools/bruno/ when needed.

To use it, open the bruno directory from a release archive in Bruno as a collection. Select its Your MantisBT instance environment and set the protocol, hostname, port, basePath, and token variables for the target installation and user API token.