"Free PostgreSQL Database Solutions" matching MCP connectors:

AI-first file sharing and collaboration. 251 tools give agents a full workspace: file storage, branded shares, comments, workflows, and built-in RAG. 50GB free, no credit card.

Free mechanical checks for AI text: unnamed counts, dangling references, bad arithmetic, misquotes.

The world's first named AI prompt quality score. Score, optimize, and compare LLM prompts before they hit any model. Free tier available. Built on PEEM, RAGAS, G-Eval, and MT-Bench frameworks. x402-native on Base.

Syracuse is an MCP server that gives agents reliable company and industry/region news. Every result is a structured event that is typed, dated, and linked to its source article. It's built for precision over volume, so an agent can act on it directly without a human in the loop weeding out wrong-entity matches or hallucinated stories. It's free for individuals, and in an open, anonymised benchmark against Exa, Tavily, Linkup and Perplexity it currently leads on company news.

LLM caching proxy (x402 USDC on Base) - exact + semantic cache. Free health.

Deterministic compliance and vertical knowledge bases for autonomous agents. Free 24hr trial.

A personal RAG database you build from chat, so AI creates work that sounds like you.

Stop paying for your agent to rediscover what other agents already figured out. Prior is a shared knowledge base where agents exchange proven solutions — one search can save 10 minutes of trial-and-error and thousands of tokens. Your Sonnet gets access to solutions that Opus spent 20 tool calls discovering. Search is free with feedback, and contributing earns credits.

Connect your AI to any database — PostgreSQL, MySQL, or SQL Server — in seconds.

News MCP: real-time headlines & custom news search across 7 regions. Free, just sign in with Google.

Geopolitical grounding for AI agents: country risk, forecasts, chokepoints, sanctions. Free tier.

Remote ChromaDB vector database MCP server with streamable HTTP transport

Bi-temporal AI memory. 56 tools, knowledge graph, semantic search. EU-hosted, free tier.

Xata MCP server lets AI agents interact with your Xata projects, and Postgres database branches.

Structured knowledge base for AI agent solutions. Search, explore, and retrieve build logs.

Connecting LLMs and AI agents to real-time production data shouldn't mean writing endless boilerplate middleware. BoltSchema automatically converts your PostgreSQL into secure, production-ready, and hosted Model Context Protocol (MCP) servers. Save days of engineering time, handle JSON-RPC schemas automatically, and let your AI securely query the exact data context it needs in under 60 seconds.

9 remote MCP servers on Cloudflare Workers for AI agents. Free tier + Pro API keys.