SQLite or PostgreSQL for an MCP project?
▸ TL;DR
SQLite for local/embedded MCPs (single user, no network). PostgreSQL for shared/production MCPs (multi-user, concurrent writes). Both have great MCP servers — pick by deployment target.
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SQLite shines for: log files, dev databases, mobile app data, single-user desktop tools. The SQLite MCP runs zero-config, no daemon needed. PostgreSQL shines for: production app data, multi-tenant SaaS, anything with concurrent writes or > 100 GB. The Postgres MCP needs connection strings and (recommended) a read-only role with table whitelist. For an MCP server that stores its own state — SQLite is simpler. For an MCP that exposes existing prod data — whatever the prod data is in.
Related questions
What is the difference between MCP and function calling?
Function calling is a vendor-specific LLM API (OpenAI, Anthropic). MCP is an open protocol — same MCP server works with any client (Claude Desktop, Cursor, VS Code). MCP avoids vendor lock-in.
Is MCP secure?
Yes, when you use MCPs from a vetted catalog. Unyly auto-scans every MCP for leaked secrets and malicious dependencies. Avoid installing random GitHub gists without verification.