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Schema-aware relational test data generator with working foreign keys, for any MCP client.
Schema-aware relational test data generator with working foreign keys, for any MCP client.
Valid MCP server (3 strong, 7 medium validity signals). 2 known CVEs in dependencies (0 critical, 2 high severity) Imported from the Official MCP Registry. 1 finding(s) downgraded by scanner intelligence.
8 files analyzed ยท 3 issues found
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Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-fixtureforge-seedweaver-mcp": {
"args": [
"-y",
"seedweaver-mcp"
],
"command": "npx"
}
}
}From the project's GitHub README.
Generate realistic, referentially-coherent test data from your real database schema โ straight from Claude, Cursor, or any MCP client.
Paste your CREATE TABLE SQL (or a JSON schema) and SeedWeaver generates seed data where foreign keys actually resolve to real primary keys, unique constraints are respected, and values are realistic (names, emails, dates, decimals). Unlike generic mock-data tools that spit out statistically random junk, SeedWeaver understands the relationships in your schema.
Ask your AI: "Generate 50 users and 200 orders for this schema" โ and get INSERTs you can run immediately, with every
order.user_idpointing at a user that exists.
Most "fake data" tools (Faker wrappers, random generators) give you isolated rows with no awareness of your schema. The moment you have foreign keys, you're back to hand-wiring relationships. SeedWeaver:
NOT NULL is honored.CREATE TABLE DDL directly, no manual config.INSERT statements, JSON, or CSV.npx -y seedweaver-mcp
Add to your MCP client config (Claude Desktop / Cursor / Windsurf):
{
"mcpServers": {
"seedweaver": {
"command": "npx",
"args": ["-y", "seedweaver-mcp"]
}
}
}
| Tool | What it does |
|---|---|
analyze_schema | Parse a schema (SQL DDL or JSON) and report tables, columns, relationships, and generation order. Run this first to confirm SeedWeaver reads your schema correctly. |
generate_seed_data | Generate coherent test data. Returns SQL INSERTs (default), JSON, or CSV. |
From SQL DDL:
Generate 20 rows of test data for:
CREATE TABLE users (
id UUID PRIMARY KEY,
email VARCHAR(255) UNIQUE NOT NULL,
full_name VARCHAR(100),
created_at TIMESTAMP
);
CREATE TABLE orders (
id SERIAL PRIMARY KEY,
user_id UUID NOT NULL REFERENCES users(id),
total DECIMAL(10,2),
status VARCHAR(20)
);
Every generated orders.user_id will be a real users.id.
From a JSON schema (gives you fine control โ enums, ranges, per-table row counts):
{
"tables": [
{
"name": "users",
"rows": 20,
"columns": [
{ "name": "id", "type": "uuid", "primaryKey": true },
{ "name": "email", "type": "email", "unique": true },
{ "name": "name", "type": "fullName" }
]
},
{
"name": "orders",
"rows": 80,
"columns": [
{ "name": "id", "type": "serial", "primaryKey": true },
{ "name": "user_id", "type": "fk", "references": "users.id" },
{ "name": "total", "type": "decimal", "min": 5, "max": 500 },
{ "name": "status", "type": "enum", "values": ["pending", "paid", "shipped"] }
]
}
]
}
Supported column types: uuid, serial, int, decimal, boolean, email, fullName, firstName, lastName, username, phone, address, city, country, company, url, word, sentence, paragraph, date, datetime, enum, fk.
The free tier is fully functional for small schemas. Pro removes the limits and adds the features you need for real projects and CI.
| Free | Pro | |
|---|---|---|
| Tables per schema | 2 | Unlimited |
| Rows per table | 50 | Unlimited |
| Output formats | SQL, JSON | + CSV |
| Deterministic seeds (reproducible data) | โ | โ |
| Custom locales | โ | โ |
| Use in CI / automation | โ | โ |
โ Get SeedWeaver Pro โ $19/mo
Activate by setting your license key:
{
"mcpServers": {
"seedweaver": {
"command": "npx",
"args": ["-y", "seedweaver-mcp"],
"env": { "SEEDWEAVER_LICENSE": "your-key-here" }
}
}
}
The SeedWeaver MCP server is MIT licensed and free to run. Pro features are unlocked with a paid license key. Built with the Model Context Protocol.
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