Search & Knowledge MCP Servers
Search engines, RAG, knowledge graphs, memory
2,874 servers
memory-mcp-server-go
A Model Context Protocol server that provides knowledge graph management capabilities.
graphmind
Local-first code intelligence for AI assistants. Turns your codebase into a knowledge graph your AI can query, navigate, and remember. 25 MCP tools.
TAM-MCP-Server
A comprehensive Model Context Protocol (MCP) server for market sizing analysis, TAM/SAM calculations, and industry research. Built with TypeScript, Express.js, and following the MCP specification.
ruvos
rUvOS — the agentic operating system. A single static Rust binary that runs as an MCP server, giving Claude Code persistent memory, resumable signed sessions, multi-agent orchestration, a knowledge graph, safety guardrails, and a signed audit trail. Zero Node.js, zero SQLite, zero daemon.
robotmem
Robot Memory - Persistent memory system for AI robots. MCP Server + hybrid search + spatial retrieval.
knowledgegraph-mcp
MCP server for enabling persistent knowledge storage for Claude through a knowledge graph with multiple storage backends and fuzzy search
mcp-deepcontext
MCP server enabling symbol-aware semantic search in Claude Code
io.github.Cranot/agentskb
Researched knowledge for AI agents. Canonical answers from official sources.
Penfield Memory
Persistent memory and knowledge graphs for AI agents. Hybrid search, context checkpoints, and more.
eu.ansvar/uk-law-mcp
UK legislation via MCP — full-text search across statutes and provisions
Pipe Docs (SPR) MCP Server
Docs + source RAG for Pipe language: semantic search, cited answers, code symbol lookup.
@yourtechtribe-labs/koncept-mcp-server
MCP server exposing semantic concept graph tools (koncept_get, koncept_for_file, koncept_search, koncept_invariants_at_scope).
io.github.rubatoyd/na-openapi-mcp
National Assembly Library of Korea catalog search (books, theses, articles, bills)
Frédérick Madore — Academic Record
Search and cite Frédérick Madore's publications, talks, research projects, DH work and CV.
io.github.akarazhev/bitcoin-risk-brief
Daily Bitcoin risk with freshness state on every response. Research context, not advice.
polymnemo
Shared cross-LLM long-term memory over MCP: semantic recall, sessions, and media (pgvector).
pomazanbohdan/memory-mcp-1file
- A self-contained Memory server with single-binary architecture (embedded DB & models, no dependencies). Provides persistent semantic and graph-based memory for AI agents.
context-lens
Semantic search knowledge base for MCP-enabled AI assistants. Index local files or GitHub repos, query with natural language. Built on LanceDB vector storage. Works with Claude Desktop, Cursor, and other MCP clients.
ace-mcp-go
Go-based MCP server for codebase indexing and semantic search (Augment-compatible)
cie
Code Intelligence Engine — indexes your codebase and gives AI assistants deep understanding via MCP (semantic search, call graphs, 20+ tools)
@0xrelogic/cognio-mcp
MCP server for Cognio semantic memory
Apple Notes
Semantic search + connection-discovery across your own Apple Notes (bridges, synthesis).
io.github.RecallWorks/recall
Open-source MCP memory server. Persistent, searchable, tiered memory across sessions.
io.github.nk3750/jitapi
Turn any OpenAPI spec into an executable agent interface using graphs and semantic search.