
RAG Engine
Connect external data to AI apps in minutes
RAG Engine launched on February 20, 2025 with 22 votes, #703 of 5,999 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 1 year on.
What it does
RAG Engine makes it dead-simple to connect AI apps to your external data (websites, docs, Slack, etc.) — with just a single API call. We handle ingestion, processing, storing and syncing at raw cost.
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LiquidIndex 2.02025 · liquidindex.dev · ▲134I'm building LiquidIndex, an RAG API service that makes it easy to add personalized context to AI apps. Instead of building a whole system to upload, process, and search through a user’s files or notes, you just call a few APIs. It handles the hard parts - like connecting to Notion or Google Drive, breaking the data into usable pieces, and making it searchable. Then, when you want to answer a question using that data, you just query it, and it gives you the most relevant results - optionally with an LLM-generated answer. No pipelines, no infrastructure, no headaches. Here are the core APIs:…



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