Seedfast

Seedfast generates relationally valid test data directly into a PostgreSQL database by reading its live schema.

What you can do

Seedfast is a local MCP server that inspects the live schema of a PostgreSQL database and produces test data that respects the existing relational constraints. It is intended to fill tables with realistic, referentially consistent rows so that development and testing environments have usable data without hand-written fixtures.

When to use it

Use it when you need populated PostgreSQL databases for development, staging, or testing and want the generated rows to satisfy foreign keys and other relational rules. It is most useful when the schema already exists and you want data that matches it.

Requirements

Runs as a local process via npx from the npm package seedfast, so Node.js and network access for the package are needed. It requires an API key supplied through the SEEDFAST_API_KEY environment variable, created in the Seedfast dashboard. It is desktop only and connects to a PostgreSQL database whose schema it reads.