"Kotlin RAG (Retrieval-Augmented Generation) implementation resources" matching MCP connectors:

Engram Obsidian Memory SyncAOAuth

io.github.engram-app

Engram is a persistent, long-term memory layer for AI agents and assistants. Claude, ChatGPT, Grok, Cursor and any MCP client share one memory, stored as plain markdown notes: your knowledge base, second brain and AI context in one place. No extraction step: the memory is the note itself, so you can read exactly what your AI remembers and fix it. Edit your memory in Obsidian (real-time sync), the web app, or on your phone. Hybrid keyword + semantic search (RAG over your notes) finds exact strings like error messages, config keys and IDs. Remote MCP server over Streamable HTTP with OAuth 2.1; notes encrypted at rest. Https://engram.page https://youtu.be/rwnPeZ-8Lqo?is=NI-N7BduydGAiZlF https://github.com/engram-app/Engram

Agent Docs ServerA

com.onrender.agent-docs-mcp

Ask questions about Claude Code, Cursor, Codex and MCP — get answers grounded in their official docs, with citations. A hybrid RAG service that AI agents call through two MCP tools (or over REST). It indexes ~600 pages of official documentation, refreshes itself daily, and every design choice is backed by an experiment.

Bounded KVP, RAG search, and wipe receipts for agent jobs over remote MCP

Full-text financial reports (US, China, Japan, Korea, Taiwan, UK) as clean Markdown for RAG agents.

Adaga solutions — Data APIs ToolboxA

io.github.jeffreyturov-dev

13 pay-per-event data APIs for local-business and web intelligence: local presence audit (Google Business Profile + reviews + AI-readiness), Google Maps scraper, review radar and review pitch generator, TikTok, Instagram, YouTube and LinkedIn scrapers, RAG web browser, France fuel prices, hotel rate monitoring, and a free AEO/AI visibility checker.

Sovereign intelligence dossiers, daily briefings, RAG search, knowledge graph, codon optimizer.

Agent-first resource directory for AI agents: protocols, security, RAG, memory, evals, and more.

CareerProof MCP gives AI agents direct access to a professional-grade career and workforce intelligence platform. Two namespaces: atlas_* for HR/TA teams (candidate evaluation, batch shortlisting, competency scoring, interview generation, JD analysis, custom eval frameworks, research reports) and ceevee_* for professionals (CV optimization, career positioning, salary intelligence, market reports). Backed by RAG knowledge from 50+ premium research sources (McKinsey, BCG, HBR, Gartner, WEF)

Agent-first resource directory for AI agents: protocols, security, RAG, memory, evals, and more.

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

mcp-serverA

com.apple-rag

Apple developer docs and WWDC transcripts with RAG retrieval and Jev relevance ranking.

PDF/Word/Excel/HTML to clean Markdown for LLMs and RAG. Keys $19/mo; 50 free calls a day.

AI Readiness KitA

io.github.silverbackmarketing

Generate 18 AI readiness files (llms.txt, ai.txt, RAG indexes, schema) for any website.

Manage your Mistral platform — models, files, batch jobs, agents and RAG document libraries.

Read-only Hebrew AI-agent recipe library with search and full-text retrieval.

Multilingual YouTube → Knowledge Pack engine. Paste a video URL and get a structured pack — summary, key ideas, glossary, quiz, transcript with timestamps — in Spanish, Portuguese, German, or English. Anonymous endpoint plus OAuth-gated tools for library search, RAG Q&A on a single pack, and Anki export.

x402 PDF text, pages, and metadata for AI/RAG. $0.0015 per successful PDF.

x402 clean article text and metadata for AI/RAG. $0.002 per successful article.

Any URL to clean text, markdown, or JSON for LLM/RAG pipelines.

HTML to clean Markdown for LLM and RAG pipelines: headings, lists, tables, links, code fences. Pr...