All deployment URLs have two special pathnames:
/_src/_logs
Source view
By appending /_src to a deployment URL or alias, the deployment inspector will be open and you'll be able to browse your deployment sources and build outputs.
Logs view
By appending /_logs to a deployment URL or alias, you will be able to see a realtime stream of logs from your deployment build processes and serverless invocations.
Security considerations
These pathnames redirect to https://zeit.co and require logging in to access any sensitive information. A 3rd-party can never access your source or logs by crafting a deployment URL with one of these paths.