Get a pipeline’s workflows → https://circleci.com/api/v2/pipeline/{pipeline-id}/workflow
Get your pipelines → https://circleci.com/api/v2/project/{project-slug}/pipeline/mine
Get all pipelines → https://circleci.com/api/v2/project/{project-slug}/pipeline
Get a workflow’s jobs → https://circleci.com/api/v2/workflow/{id}/job
etc
It’s really counter-intuitive to not have all those leading s for words you expect to be plural.