Mcp Postgres Analytics


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Read-only PostgreSQL analytics agent exposed as an MCP server. Designed to drop into a production database safely — no DDL, no DML, no writes ever.

Tools

• query_plan — EXPLAIN (ANALYZE, BUFFERS, VERBOSE) against a query string, with annotated cost hot spots
• slow_queries — top N queries by mean time / total time / call count from pg_stat_statements
• index_usage — index hit ratio, dead indexes, missing-index hints
• table_bloat — bloat estimation per table
• vacuum_status — last vacuum / autovacuum / analyze per table, with wraparound risk flagged
• connection_stats — active sessions, idle-in-transaction, longest-running transactions
• lock_waits — blocked queries with the blocker chain resolved
• size_summary — database/schema/table/index size, sorted

Safety guarantees

The MCP server connects as a role with pg_read_all_stats and CONNECT only. The connection string in
MCP_POSTGRES_DSN is validated at startup to refuse any role that has CREATE, INSERT, UPDATE, DELETE, TRUNCATE, ALTER, or DROP privileges. Refusal exits with a clear error rather than running with elevated
rights.

query_plan accepts a query string but executes it inside EXPLAIN (...) only — the query itself is never
run. MCP_POSTGRES_DSN is validated at startup to refuse any role that has CREATE, INSERT, UPDATE, DELETE, TRUNCATE, ALTER, or DROP privileges. Refusal exits with a clear error rather than running with elevated rights.

query_plan accepts a query string but executes it inside EXPLAIN (...) only — the query itself is never run.

Quick start

pip install git+https://github.com/archimedes-market/mcp-postgres-analytics
export MCP_POSTGRES_DSN="postgresql://reader@host:5432/db"
mcp-postgres-analytics serve
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License
MIT.