SIXTA Connect

SIXTA Connect: DBRE-grade SQL analysis in any MCP client

Paste a slow query, an EXPLAIN plan, a migration, a database error, or a deadlock dump and get back named findings, a severity, the rationale, and a ready-to-run fix. For PostgreSQL and MySQL. No database connection, no agent, no install: it analyzes only what you paste, in memory, and discards it.

Think of it as the database engineer you'd call at 11pm, on demand, living inside your editor.

What it catches

• Result-changing bugs: NOT IN (subquery) with NULLs, = NULL, inequality filters that silently drop rows, a LEFT JOIN filtered in WHERE, self-comparison, non-deterministic DISTINCT ON.
• Index-defeating patterns: functions / casts / implicit conversions on filtered columns, leading-wildcard LIKE, ORDER BY RAND(), deep OFFSET.
• Migration safety: exactly which ALTER locks the table on your specific MySQL / PostgreSQL version (INSTANT vs INPLACE vs COPY), with a safe online-change alternative.
• Plus: EXPLAIN plans, deadlock dumps, redundant indexes, slow-query logs, N+1 patterns, error codes, and a static security / compliance review.

Tools (all read-only)

Analyze query, analyze schema change, explain plan, explain deadlock, find redundant indexes, review security, explain error code, detect N+1, rewrite query, digest slow-query log, diagnose, quickstart, health check.

Add it

Remote MCP server (Streamable HTTP):

{ "mcpServers": { "sixta": { "url": "https://connect.sixta.ai/mcp" } } }