This is a workaround for customers to hit a CircleCI API endpoint and receive a CSV in response. To use this, you need a CircleCI token.
Get summary metrics for a project's workflows
http://circleci.com/api/v2/insights/{project-slug}/workflows?circle-token={CIRCLETOKEN}
Get recent runs of a workflow job
http://circleci.com/insights/{project-slug}/workflows/{workflow-name}/jobs/{job-name}?circle-token={CIRCLETOKEN}
Replace "circleci.com" with "api-to-csv.herokuapp.com" ie:
http://api-to-csv.herokuapp.com/insights/{project-slug}/workflows/{workflow-name}/jobs/{job-name}
Reference
Please see more information from the CircleCI API v2 docs
This is not an official CircleCI endpoint or solution by any means.
Contributions welcome via issues or pull request.