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Seedfast MCP Server

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Seedfast MCP Server

Seedfast fills a PostgreSQL database with realistic, relationally valid test data generated from its live schema, so a team that cannot put production data into development still gets an environment that behaves like production.

This repository is the public integration surface for its MCP server. You will find the client configuration, the tool reference and a smoke test here. The engine and the CLI themselves are closed-source and ship through npm and Homebrew.

Published in the official MCP registry as st.seedfa/seedfast.

Install

Nothing separate to install. The MCP server is built into the Seedfast CLI and runs straight from npx:

{
  "mcpServers": {
    "seedfast": {
      "command": "npx",
      "args": ["-y", "seedfast@latest", "mcp"],
      "env": {
        "SEEDFAST_API_KEY": "sfk_live_your_api_key_here"
      }
    }
  }
}

That block goes into claude_desktop_config.json for Claude Desktop, .cursor/mcp.json for Cursor, or the equivalent file for VS Code and Claude Code. Client-by-client paths are in the MCP setup guide.

Prefer a local binary? Install the CLI and point command at seedfast with args: ["mcp"] instead:

brew install seedfast-ai/tap/seedfast   # macOS, Linux
npm install -g seedfast                 # any platform with Node.js

Related MCP server: mcp-backend

Configuration

Variable

Required

What it does

SEEDFAST_API_KEY

yes

API key created in the Seedfast dashboard

SEEDFAST_MCP_RUNS_DB

no

Path to a SQLite file. Without it, runs and plans live in memory and disappear when the server exits

Tools

Thirteen tools cover the whole loop of planning a seed, running it and inspecting what happened.

Tool

What it does

seedfast_doctor

Checks CLI health and whether authentication is configured

seedfast_connections_test

Tests a database connection before anything is written

seedfast_schema_info

Reads the live schema of the target database

seedfast_plan

Builds a seeding plan from a scope description

seedfast_run

Executes a seeding run

seedfast_run_status

Polls a run in progress

seedfast_run_cancel

Aborts a run

seedfast_run_answer

Answers a question the run raised while it was waiting for input

seedfast_plans_list

Lists saved plans

seedfast_plan_get

Reads one saved plan

seedfast_plan_create

Saves a new plan

seedfast_plan_update

Edits a saved plan

seedfast_plan_delete

Removes a saved plan

Resources

URI

Media type

Contents

seedfast://runs/{runId}/summary

application/json

Summary of a seeding run

seedfast://runs/{runId}/log

application/x-ndjson

Event log of a seeding run

seedfast://runs/{runId}/pending_question

application/json

The question a run is waiting on, while it is in awaiting_input

seedfast://plans/{planId}

application/json

Details of a saved plan

Prompts

Two prompts ship with the server: seed-production-db, which takes a scope and a description of the target database, and scope-examples, which turns a use case into example scopes.

Verify

The smoke test starts the published package over stdio, completes an MCP handshake and lists the tools. It needs no API key, since it never reaches the backend:

node scripts/smoke-test.mjs

Expected output ends with the protocol version the server negotiated and the number of tools it advertises.

Databases

Seedfast works with PostgreSQL today. Going PostgreSQL-first was deliberate, since its constraint and relationship system is the richest one out there and that is exactly where generating believable data gets hard. Support for MySQL, Oracle and SQLite is in development.

Links

License

MIT for the contents of this repository. The Seedfast CLI is distributed under the same license; its engine runs as a hosted service.

This server cannot be installed

A
license - permissive license
-
quality - not tested
C
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity

Resources

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