QueryBear vs Anthropic's Postgres MCP
Production gateway vs archived 130-line reference
Anthropic archived their reference Postgres MCP server in April 2026. QueryBear is the production-grade replacement: real SQL parsing, table and column allowlists, audit logging, row limits, and an audit log — instead of just `BEGIN TRANSACTION READ ONLY`.
Try QueryBear FreeKey Differences
Maintenance status
Actively developed, with weekly releases.
Archived in April 2026. Not maintained. Anthropic recommends moving off.
Security model
SQL parser (libpg_query) + table & column allowlists + row limits + audit log.
`BEGIN TRANSACTION READ ONLY` and nothing else. No allowlist, no column masking, no limits.
Multi-tenant
Built-in. OAuth Dynamic Client Registration. Per-workspace credentials.
Single connection string per process. Multi-tenant means run multiple processes.
Schema discovery
Cached, two-pass schema lookup. Sub-second on databases with 700+ tables.
Re-queries `information_schema` on every request.
Feature Comparison
Read-only enforcement
Table allowlist
Column blocking (PII)
Row limit
Statement timeout
EXPLAIN dry-run
Audit log
Schema caching
MCP transport
UI for non-engineers
Pricing
Maintenance
When to Choose What
Choose QueryBear if...
- You want a production-ready replacement for the archived reference
- You need real allowlists and column masking, not just a read-only role
- You want an audit log of every agent query
- You don't want to maintain your own MCP server fork
- You need OAuth-based multi-tenant auth out of the box
Choose Anthropic Postgres MCP (archived) if...
- You're learning MCP and want to read the canonical 130-line example
- You're building your own gateway and want the simplest possible reference
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