MCP server for sqlike, a deterministic SQL static analyzer and advisor (validity, anti-patterns, rewrites, index and schema advice) and query-equivalence checker for Postgres, MySQL, MariaDB, SQLite, SQL Server, and DuckDB.

Point your coding agent at it and the SQL it writes gets checked before it runs, by something with no model in the loop and no opinion to guess with.

This package is a thin remote client. It tokenizes your SQL locally, so identifiers and literals are masked before anything leaves your machine, and forwards only the tokenized query to the sqlike API. There is no analysis engine in it.

Use it

No install needed. Point your MCP client at it via npx:

{
  "mcpServers": {
    "sqlike": {
      "command": "npx",
      "args": ["-y", "@sqlike/mcp"]
    }
  }
}

It exposes two tools:

analyze: static analysis of one query. Takes sql, plus optional schema DDL for column and type aware checks and a dialect of postgres (default), mysql, mariadb, sqlite, mssql, or duckdb. Returns the JSON analysis envelope.
diff: whether two queries are equivalent. Takes sql_a and sql_b, plus the same optional schema and dialect. Returns a verdict (Equivalent, EquivalentWithNotes, Differs, or Undecided), a confidence level, and a report per property (columns, rows, cardinality, order). Undecided never means equivalent.

A query that cannot be parsed cannot be tokenized, so the tool refuses rather than send raw SQL. Overriding that is an explicit allow_raw: true on analyze.

Configuration

Both are read from the environment:

SQLIKE_URL: API base URL (default https://api.sqlike.com).
SQLIKE_API_KEY: optional, sent as a Bearer token for higher rate limits.

{
  "mcpServers": {
    "sqlike": {
      "command": "npx",
      "args": ["-y", "@sqlike/mcp"],
      "env": { "SQLIKE_API_KEY": "sk_..." }
    }
  }
}

How it ships

The server is a native binary. Each platform's binary is published as its own optional-dependency package (@sqlike/mcp-linux-x64, @sqlike/mcp-darwin-arm64, and so on), so npm installs only the one matching your OS and CPU. No install scripts run, which means this works with --ignore-scripts and in locked-down environments. Supported: linux x64 and arm64, macOS x64 and arm64, Windows x64.