Prisma · runtime error

The URL must start with the protocol postgresql://

error: Error validating datasource `db`: the URL must start with the protocol `postgresql://` or `postgres://`.
  -->  schema.prisma:8

What it means

DATABASE_URL is set, but it doesn't match the provider in schema.prisma. Prisma checks the protocol before connecting.

Common causes

• provider = "postgresql" but DATABASE_URL is still file:./dev.db (or the other way round)
• The Supabase or Neon project URL (https://…) pasted instead of the database connection string
• Quotes or a space copied into the value in the hosting dashboard

How to fix it

1. Make the provider and the URL agree: postgresql:// for Postgres, file: for SQLite
2. Copy the connection string from the database's Connect panel, not the API URL
3. Paste the raw value in the dashboard, without quotes

Prompt for Cursor or Claude Code

Prisma says the datasource URL has the wrong protocol. Compare the provider in prisma/schema.prisma with the protocol of DATABASE_URL (don't print the full value, just the scheme) and tell me which one to change. If I'm moving from SQLite to Postgres, update the provider and remind me to run prisma db push or migrate.

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