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What is a Prisma shadow database?

A shadow database is a temporary database that prisma migrate dev uses to detect schema drift and check migrations.

Last updated November 9, 2026

The short version

A shadow database is a temporary database that prisma migrate dev uses to detect schema drift and check migrations. Prisma normally creates and drops it automatically, which requires permission to create databases. On shared hosting that permission is usually missing, so you must provide a separate shadow database URL yourself.

On EasyHost

Each EasyHost database includes one. Find it as shadowConnectionString in ezhst db info --json. Learn more.

Start for free

Install the skill, choose Global or Local, then tell your agent to deploy. No credit card, no config files.

npx ezhst skill install