Search & Knowledge MCP Servers

Search engines, RAG, knowledge graphs, memory

2,874 servers

memory-mcp-server-go

37
Manual

A Model Context Protocol server that provides knowledge graph management capabilities.

92

graphmind

37
Manual

Local-first code intelligence for AI assistants. Turns your codebase into a knowledge graph your AI can query, navigate, and remember. 25 MCP tools.

52

TAM-MCP-Server

37
Manual Caution 67

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.

30

ruvos

37
Manual

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.

26

robotmem

37
Manual

Robot Memory - Persistent memory system for AI robots. MCP Server + hybrid search + spatial retrieval.

24

knowledgegraph-mcp

37
Manual

MCP server for enabling persistent knowledge storage for Claude through a knowledge graph with multiple storage backends and fuzzy search

24

mcp-deepcontext

37
Manual

MCP server enabling symbol-aware semantic search in Claude Code

10

io.github.Cranot/agentskb

37
npx

Researched knowledge for AI agents. Canonical answers from official sources.

9

Penfield Memory

37
Remote

Persistent memory and knowledge graphs for AI agents. Hybrid search, context checkpoints, and more.

6

eu.ansvar/uk-law-mcp

37
npx Caution 75

UK legislation via MCP — full-text search across statutes and provisions

5

Pipe Docs (SPR) MCP Server

37

Docs + source RAG for Pipe language: semantic search, cited answers, code symbol lookup.

3

@yourtechtribe-labs/koncept-mcp-server

37
npx

MCP server exposing semantic concept graph tools (koncept_get, koncept_for_file, koncept_search, koncept_invariants_at_scope).

1 85/wk

io.github.rubatoyd/na-openapi-mcp

37
Auth Required

National Assembly Library of Korea catalog search (books, theses, articles, bills)

1

Frédérick Madore — Academic Record

37

Search and cite Frédérick Madore's publications, talks, research projects, DH work and CV.

1

io.github.akarazhev/bitcoin-risk-brief

37
npx

Daily Bitcoin risk with freshness state on every response. Research context, not advice.

polymnemo

37
Remote

Shared cross-LLM long-term memory over MCP: semantic recall, sessions, and media (pgvector).

pomazanbohdan/memory-mcp-1file

36
Manual

- A self-contained Memory server with single-binary architecture (embedded DB & models, no dependencies). Provides persistent semantic and graph-based memory for AI agents.

25

context-lens

36
Manual

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.

24

ace-mcp-go

36
Manual

Go-based MCP server for codebase indexing and semantic search (Augment-compatible)

22

cie

36
Manual

Code Intelligence Engine — indexes your codebase and gives AI assistants deep understanding via MCP (semantic search, call graphs, 20+ tools)

13

@0xrelogic/cognio-mcp

36
npx

MCP server for Cognio semantic memory

10 12/wk

Apple Notes

36
Auth Required

Semantic search + connection-discovery across your own Apple Notes (bridges, synthesis).

8

io.github.RecallWorks/recall

36
uvx

Open-source MCP memory server. Persistent, searchable, tiered memory across sessions.

8

io.github.nk3750/jitapi

36
uvx Auth Required

Turn any OpenAPI spec into an executable agent interface using graphs and semantic search.

7
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