Consider deprecating old routes API

**Problem**
When working with services, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

Start by locating the routes API and the service error-handling entry points; the issue does not name specific files, routes, or tests. Determine which older routes are in scope and how detailed errors should be verified before proposing a deprecation plan.

Written by the indexing model from the issue text.