MCP servers · AI, RAG & memory

50 listings on this page, in order of arrival. Each one has its own page with README, repository facts and source links.

1. Afterpaths ★ 2
   Session memory for AI coding agents. Search past sessions, extract rules, and track what works.
2. io.github.butterbase-ai/mcp ★ 3,490
   Butterbase MCP server — manage your backend: schemas, auth, functions, storage, RAG, deploys.
3. io.github.buttonmonkey/mcp-loom ★ 1
   Stdio MCP proxy: intercepts oversized tool results into a queryable embedded DuckDB.
4. Enzyme ★ 59
   Semantic search and pattern discovery for Obsidian and markdown vaults.
5. io.github.bytewizard42i/soulsketch ★ 3
   Portable, user-owned AI memory packs: read, validate, fingerprint, diff, and observe
6. io.github.c64dos-png/vector-mirror
   Deterministic SVG perception for LLM agents — measures, never guesses. MCP server.
7. io.github.cachly-dev/mcp-server ★ 2
   Persistent memory + causal root-cause analysis for AI coding agents. 124 MCP tools. EU, GDPR.
8. io.github.cadlens-co/cadlens-mcp ★ 1
   Model Context Protocol server that wraps the CADLens REST API.
9. io.github.caelum29/calibre-mcp ★ 12
   Calibre ebook library server: search, read content, curate metadata, semantic search, gated writes.
10. Callosium ★ 9
    One shared memory for every AI you use, in plain Markdown files you own.
11. Calypso Multimodal RAG MCP ★ 2
    Calypso multimodal RAG for grounded answers from docs, images, charts, and knowledge.
12. io.github.camgitt/memoir ★ 14
    Persistent memory for AI coding tools via MCP. Remembers across sessions and machines.
13. io.github.canonicalmg/sortio
    Read-only search of your Sortio knowledge graph (files and entities) for Claude and ChatGPT.
14. io.github.cap-js/mcp-server ★ 112
    Model Context Protocol (MCP) server for AI-assisted development of CAP applications.
15. io.github.capyBearista/gemini-researcher
    Stateless MCP server that proxies research queries to Gemini CLI, reducing agent context/model usage
16. io.github.carlisia/mcp-factcheck ★ 3
    An MCP server that validates content against MCP specification using semantic search and AI
17. Hipocampo MCP
    Bilingual dual memory with SSC for AI agents. Semantic search, embeddings, profiles.
18. PuzzleTide
    Word search, crossword, and sudoku generators, printable PDF worksheets, and verifiable LLM evals.
19. io.github.cdeust/hypermnesia-mcp ★ 71
    Persistent memory for AI agents — 36 cited neuroscience mechanisms, local-first, hybrid retrieval.
20. io.github.cdeust/hypermnesia-mcp-viz ★ 4
    Read-only visualization for Cortex memory, knowledge, sessions, traces, and codebase graphs.
21. RemembrallMCP ★ 35
    Persistent knowledge memory for AI agents. Hybrid search, code graph, pgvector.
22. Agent^Rider ★ 2
    Signed agent identity, trust scoring, credit economy, and social layer for AI agents.
23. io.github.cerebrixos/tuning-engines ★ 6
    Domain-specific LLM fine-tuning — sovereign models trained on your data, zero infrastructure.
24. aether studio — AI Image Generation, Editing & Creative Workflow
    Generate, edit, and explore AI images. Flux, Imagen, LoRA identity swap, upscale, and more.
25. ChainMemory
    Persistent cross-model memory for AI agents: verifiable, portable, client-side encrypted.
26. Reasoning Commons
    AI Reasoning Cache & Consensus Layer with 11 MCP tools via Streamable HTTP.
27. io.github.chernistry/bernstein ★ 1,176
    Declarative agent orchestration for engineering teams
28. io.github.chicogong/ffvoice ★ 3
    Offline speech-to-text & speaker diarization MCP server: transcribe audio on-device, no cloud
29. Chipzen ★ 2
    AI poker arena for agents. Play rated poker on chipzen.ai against LLM bots and human-built bots.
30. io.github.chris-schra/mcp-funnel ★ 156
    MCP proxy that aggregates multiple servers with tool filtering and customization
31. io.github.chrischall/gemini-mcp
    Generate and edit images with Google Gemini (Nano Banana / Nano Banana Pro) image models.
32. Lobex
    Agent-to-agent marketplace MCP: list skills, buy/sell services, earn gas, cash out BTC.
33. io.github.chrismcdermut/proletariat-cli ★ 35
    Agent orchestration platform - multi-agent spawning, tickets, boards, and workflows
34. tollbooth
    Stateful backend for AI agents: memory, watch, render, execute, and shared boards with digests.
35. Nautilus Compass ★ 7
    Drift-aware cross-agent memory · MCP/A2A · LongMemEval-S 56.6% · 1/15 Zep cost
36. Civis
    Structured knowledge base for AI agent solutions. Search, explore, and retrieve build logs.
37. io.github.cklam12345/wisdomgraph ★ 2
    Neo4j-native DIKW memory for Claude Code — knowledge that compounds across sessions
38. io.github.clauderecallhq/recall
    Persistent memory for Claude Code. Search, recall, and re-inject context from any session.
39. io.github.cmd8/excalidraw-mcp ★ 5
    Model Context Protocol server for Excalidraw diagrams.
40. vocce transcribe
    Agent media tools: transcribe, summarize, notes, flashcards, doc Q&A, PDF compress. No API key.
41. io.github.codeChap/claude-chat
    Anthropic Claude Messages API MCP server — chat, vision, web search, extended thinking
42. io.github.codeChap/fable
    Anthropic Claude Fable 5 MCP server — top-tier planning and code critique for handoff
43. io.github.codeChap/google-image
    MCP server for Google Gemini image generation and editing
44. io.github.codeChap/gpt-chat
    MCP server for the OpenAI ChatGPT API — chat, vision, and embeddings
45. io.github.codeChap/gpt-image
    MCP server for OpenAI GPT image generation and editing
46. io.github.codeChap/grok-chat
    MCP server for the xAI Grok API — chat, vision, search, and embeddings
47. io.github.codeChap/grok-image
    MCP server for Grok image generation and editing
48. io.github.codeFi/mcp-nano-banana
    MCP server for Google Nano Banana (Gemini) image generation
49. io.github.codegraph-ai/codegraph ★ 82
    Semantic code graph: 42 tools, 38 languages. Callers, impact, AI context, memory, PR review.
50. io.github.codeledgerECF/codeledger ★ 8
    Deterministic context selection for AI coding agents. Local memory that compounds across sessions.