--- title: "Postgres MCP Pro: review, setup & limitations · Undominated.ai" canonical: https://undominated.ai/mcp-servers/postgres/ description: "Combines PostgreSQL schema and SQL access with health checks, query plans and index-analysis tools." --- # Postgres MCP Pro: review, setup & limitations · Undominated.ai > Combines PostgreSQL schema and SQL access with health checks, query plans and index-analysis tools. [← Explore all mcp servers](/mcp-servers/) DATABASE DIAGNOSTICS / Crystal DBA # Postgres MCP Pro Combines PostgreSQL schema and SQL access with health checks, query plans and index-analysis tools. See setup guidance ↓Original source ↗ SOURCE REVIEW Reviewed 2026-09-21 Evidence 4 linked sources Publisher Crystal DBA Licence MIT ↗ Revision 15c8e3335354 Read what was—and wasn’t—checked ↓ “Postgres MCP Pro does much more than wrap a database connection.” Crystal DBA · upstream description ↗ Our analysis follows below. 01 / THE REASONING ## Why this made the selection. - Provides database-health and query-plan tools in addition to generic SQL access. - The restricted access mode is implemented separately from unrestricted execution. ### A good fit for - Investigating slow queries and database health with a restricted database identity. ### Weigh up before choosing - The default access mode is unrestricted and allows data/schema changes. - Restricted mode is not a substitute for PostgreSQL grants, and advanced diagnostics may need optional extensions. 02 / THE REVIEW RECORD ## What we actually inspected. Source review has boundaries. A clear record is more useful than a “safe” badge. ### Material inspected - README.md (installation, capability and permission sections) - pyproject.toml - src/postgres_mcp/server.py - LICENSE ### Our findings - The entrypoint defaults to unrestricted mode; the command below explicitly selects the documented restricted replacement. - Restricted execution uses a separate SQL driver and timeout; no query execution or isolation test was performed here. ### Not established by this review - Server startup, authentication and tool execution were not tested. The review applies to the material and revision named here. A newer upstream release can change its behavior. 03 / PUT IT TO WORK ## Connect a server deliberately. Upstream setup instructions ↗ DOCUMENTED COMMAND uvx postgres-mcp --access-mode=restricted Copy command ↗ Copying does not execute this command. It may retrieve a newer version than the reviewed source. - Configure DATABASE_URI through the client’s secret mechanism. - Keep restricted mode and use a database role limited to the intended schemas; enable diagnostic extensions only when needed. ### Before you start - uv/Python and a reachable PostgreSQL database. ### Compatibility An MCP client supporting stdio, SSE, Streamable HTTP. · uv/Python and a reachable PostgreSQL database. ### Implementation Python ### Transports stdio · SSE · Streamable HTTP ### Database diagnostics / Configured credentials or local access - Reads database metadata, query results and diagnostic information. - Unrestricted mode can modify database data and schema. ### Cost model Database hosting and diagnostic-query resource use determine cost. 04 / FOLLOW THE EVIDENCE ## The source trail. Our notes are separate from the original resource. Check upstream before adopting a new version. - Official documentation ↗ Checked 2026-09-21 https://github.com/crystaldba/postgres-mcp/blob/15c8e33353546148acc2d8bd784551cf3905d1e2/README.md Supports: summary, whySelected, bestFor, limitations, install, access, compatibility, transports - Applicable source licence ↗ Checked 2026-09-21 https://github.com/crystaldba/postgres-mcp/blob/15c8e33353546148acc2d8bd784551cf3905d1e2/LICENSE Supports: license - Implementation: pyproject.toml ↗ Checked 2026-09-21 https://github.com/crystaldba/postgres-mcp/blob/15c8e33353546148acc2d8bd784551cf3905d1e2/pyproject.toml Supports: language, review - Implementation: src/postgres_mcp/server.py ↗ Checked 2026-09-21 https://github.com/crystaldba/postgres-mcp/blob/15c8e33353546148acc2d8bd784551cf3905d1e2/src/postgres_mcp/server.py Supports: language, review KEEP COMPARING ## Other approaches to consider. Related by category or shared topics. These are alternatives to inspect, not a measured quality order. [### AWS IaC MCP Server ↗ Validates CloudFormation templates, retrieves CDK/CloudFormation guidance and investigates failed deployments.](/mcp-servers/aws-iac/)[### Chroma MCP ↗ Lets an assistant create and query Chroma collections through local, HTTP or Chroma Cloud database connections.](/mcp-servers/chroma/)[### ClickHouse MCP Server ↗ Queries ClickHouse and inspects table metadata, with read-only SQL by default and separate authentication for network transports.](/mcp-servers/clickhouse/) [AI Tools ↗](/tools/)[Skills ↗](/skills/)[Agents ↗](/agents/)[MCP Servers ↗](/mcp-servers/)