In-depth architectural comparison of the Postgres (read Only) and Supabase MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Postgres (read Only)
Databases · Local stdio
Quality: 27/100 (Emerging) | Auth: No auth required
Supabase
Databases · Remote HTTP/SSE
Quality: 45/100 (Fair) | Auth: No auth required
Verdict Summary: Choose Postgres (read Only) if you need specialized Databases tools running via a local process. Choose Supabase if your workspace requires Databases integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.
Which MCP Server Should You Choose?
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Choose Postgres (read Only) when:
You need dedicated capabilities in the Databases domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Postgres (read Only) is categorized under Databases and uses a local stdio subprocess. In contrast, Supabase belongs to Databases using remote streaming HTTP/SSE transport. Select Postgres (read Only) when you need capabilities focused on databases and Supabase when you require tools for databases.