# BidEngine > Roof measurement reports and proposals for contractors. Submit an address, get a measured roof report in about 30 minutes. ## Docs - [BidEngine documentation](https://docs.bidengine.app/index.md): Roof measurement reports for contractors, delivered in about 30 minutes by people who know roofs. - [Submit your first report](https://docs.bidengine.app/quickstart.md): Everything a measurement request needs, and what happens after you submit it. - [What's in a report](https://docs.bidengine.app/reports/what-you-get.md): The measurements and diagrams included in a BidEngine roof report, and how to bid from them. - [Accuracy and revisions](https://docs.bidengine.app/reports/accuracy-and-revisions.md): What the disclaimers on a report mean, and how to request a revision. - [Proposals](https://docs.bidengine.app/proposals.md): Turn a roof report into a ready-to-sign proposal for the homeowner. - [Authentication](https://docs.bidengine.app/api-reference/authentication.md): Authenticate requests to the BidEngine Project API. - [Projects](https://docs.bidengine.app/api-reference/projects.md): Read and create projects with the BidEngine Project API.