Search: graph
Search MCP servers and agent skills by name, description, category or topic — 259 results.
neo4j-contrib/mcp-neo4j
Model Context Protocol with Neo4j (Run queries, Knowledge Graph Memory, Manaage Neo4j Aura Instances)
SaravananJaichandar/world-model-mcp
Temporal knowledge graph for codebases. Captures decision traces, links test failures to code changes, learns co-edit patterns, predicts regression risk, and enforces learned constraints at the edit boundary via a PreToolUse hook. 22 MCP tools, 9 SQLite databases with FTS5, supports Python/TypeScript/JavaScript/Solidity/Go/Rust/Java. Install via `pip install world-model-mcp`.
Bright-L01/networkx-mcp-server
The first NetworkX integration for Model Context Protocol, enabling graph analysis and visualization directly in AI conversations. Supports 13 operations including centrality algorithms, community detection, PageRank, and graph visualization.
gzoonet/cortex
Local-first knowledge graph for developers. Watches project files, extracts entities and relationships via LLMs, builds a queryable knowledge graph with web dashboard and CLI. Provides 4 MCP tools: get_status, list_projects, find_entity, query_cortex.
forcedreamai/forcedream-mcp
Discover, invoke, and cryptographically verify AI agents on a paid agent marketplace. 13 tools spanning code generation (6-module engineering verification), security scanning (OSV.dev + GitGuardian), and lead scoring (8 real sources). Every result is Ed25519-signed and independently verifiable -- no trust in the platform required. Install: `npx -y @forcedream/mcp-server`.
syndicalt/zaxy
Event-sourced agent memory on a hash-chained append-only log with an embedded temporal knowledge graph (Kuzu, no sidecar). Cited Memory Checkout context, salience-based forgetting that attenuates instead of deleting, compaction-recovery hooks for Claude Code, token-budgeted checkout, and review-gated consolidation. 47 MCP tools with an 8-tool core profile default. `pip install zaxy-memory` [Docs](
AliceLJY/recallnest
Persistent memory MCP server for AI coding agents (Claude Code, Codex, Gemini CLI). Hybrid retrieval (vector + BM25), cross-encoder reranking, knowledge graph with PPR traversal, session checkpoint/resume, and multi-scope isolation. Local-first with LanceDB + SQLite, zero external dependencies.
remembra-ai/remembra
Persistent memory layer for AI agents with entity resolution, PII detection, AES-256-GCM encryption at rest, and hybrid search. 100% on LoCoMo benchmark. Self-hosted.
aliasunder/vault-cortex
MCP server for Obsidian vaults — hybrid search, notes & files, memory, tasks, link graph, OAuth-protected.
TyKolt/kremis
Deterministic knowledge graph MCP server. Single binary, zero LLM/embedding calls in the bridge, BLAKE3 state hashing, canonical KREX export for byte-identical audit. Local-first via redb (ACID). **Alpha**.
SecurityRonin/alaya
Neuroscience-inspired memory engine for AI agents. Stores episodes, consolidates knowledge through a Bjork-strength lifecycle (strengthening, transformation, forgetting), and builds a personal knowledge graph with emergent categories, preferences, and semantic recall. Local SQLite, zero config, 10 MCP tools. Install via `npx alaya-mcp`.
smaniches/semantic-scholar-mcp
Semantic Scholar MCP server: 14 typed tools over 200M+ academic papers — search, paper/author retrieval, citation-graph traversal, and recommendations. `uvx s2-mcp-server`
STiFLeR7/memex
Developer context continuity system. Watches your git repos and builds a temporal knowledge graph of modules, symbols, decisions, and open problems via Graphiti + Neo4j, then serves it to any AI coding agent over MCP. Every edge carries a validity window and a confidence score that decays over time. 12 tools across read and write. Install via `npx -y stifler-memex-mcp`. MIT licensed.
cq27-dev/rag-rat
Local repo-intelligence index and MCP server for coding agents — "what a repository knows about itself." Hybrid BM25 + vector semantic search, a tree-sitter code graph (callers/callees/imports across Rust, TS/TSX, Kotlin, C/C++, Python) with an optional compiler-grade SCIP oracle, queryable git/GitHub history, and typed, source-anchored repo memories (Invariant, Decision, Risk, …) that persist acr
Whatsonyourmind/oraclaw
Decision intelligence MCP server with 19 algorithms (bandits, Monte Carlo, constraint optimization, forecasting, anomaly detection, risk analysis, graph algorithms), 28 MCP tools. Install via `npx -y @oraclaw/mcp-server`.
marzukia/charted
Zero-dependency chart server that renders bar, line, pie, scatter, and more from JSON or CSV to SVG, HTML, PNG, or data URL. Built-in themes; PNG output renders inline in chat. Install via `uvx --from charted[mcp] charted-mcp`.
AIOProductOS/studio-mcp
Turns your AI host into a product videographer: scripted screen recordings of your own web app with a visible gliding cursor, camera zooms, highlight callouts, captions, and designed scene transitions, plus marketing-grade screenshots; deterministic dark-frame cleanup and MP4/GIF export. Free and fully local. `npx -y @aioproductoscom/mcp-studio`
ZengLiangYi/ChatCrystal
Local-first AI PKM memory server for coding conversations. Imports Claude Code, Cursor, Codex CLI, Trae, and GitHub Copilot chats into notes, semantic search, tag graphs, Markdown exports, and reusable MCP memory. `npx -y chatcrystal mcp`
rps321321/obsidian-mcp-pro
Feature-complete Obsidian vault MCP server with 23 tools and 3 resources. Full-text search, note CRUD, frontmatter queries, tag management, backlinks, graph traversal (BFS up to 5 hops), orphan/broken link detection, and canvas support. Auto-detects vault, path traversal protection, MIT licensed.
jagoff/memo
Local-first semantic memory server with hybrid search, plain Markdown storage, MLX or CPU embeddings, contradiction detection, time-travel history, synthesis, and cross-machine git sync.
YGao2005/scholar-feed-mcp
Semantic search over 600k+ CS/AI papers with citation-graph traversal, full-text extraction, embeddings, and BibTeX export. Works anonymously or with a free key. Install: `npx scholar-feed-mcp init`.
rwnalds/engram
Second brain your agents read and write, over a git-backed markdown vault. Authority-aware search ranks superseded and archived notes below live ones (from frontmatter, no vector DB), so agents quote the current doc, not the dead one. Per-agent read-only or write tokens, a git audit trail of every change with diffs, a knowledge-graph dashboard, and Obsidian compatibility.
quantakrypto/pqc-tools
Post-quantum readiness for AI coding agents: scan code for quantum-vulnerable cryptography (RSA/ECDH/ECDSA/DH), explain the harvest-now-decrypt-later exposure, get NIST ML-KEM/ML-DSA/SLH-DSA (and hybrid) migration guidance, verify fixes, and check dependencies. Content-based/advisory tools only. Run local (`npx @quantakrypto/mcp`) or the hosted OAuth endpoint at [mcp.quantakrypto.com](https://mcp.
gavelcode/gavel
Code-quality gate for Bazel monorepos: runs lint, coverage and architecture checks off the build graph and returns a pass/fail verdict an agent can request before finishing a change.
Disentinel/grafema
Semantic code graph MCP server for AI coding agents. Indexes your codebase into a typed graph (functions/types/modules as nodes; CALLS/IMPORTS/DATAFLOW/EFFECTS as typed edges) and exposes 40+ tools for call-chain tracing, data-flow analysis, semantic search, and invariant checking — so agents navigate code structure instead of reading files line by line. `npm install -g grafema`
joelio/stocky
An MCP server for searching and downloading royalty-free stock photography from Pexels and Unsplash. Features multi-provider search, rich metadata, pagination support, and async performance for AI assistants to find and access high-quality images.
mlava/scholar-sidekick-mcp
Resolve any scholarly identifier (DOI, PMID, PMCID, ISBN, arXiv, ISSN, ADS bibcode, WHO IRIS URL) into structured CSL JSON, format in 10,000+ citation styles, or export to BibTeX/RIS/EndNote/Zotero RDF/CSV. Single or batch. Install: `npx -y scholar-sidekick-mcp`.
pallaprolus/mendeley-mcp
MCP server for Mendeley reference manager. Search your library, browse folders, get document metadata, search the global catalog, and add papers to your collection.
OrygnsCode/Omnicord
Hands your AI an entire Discord server: 148 tools covering chat, moderation, automod, events, and full administration, up to building a complete community server from one paragraph. One-command guided setup, and every destructive action previews and waits for your confirmation.
udjin-labs/mnemostack
Durable hybrid memory for AI agents. Combines vector search, BM25, temporal retrieval, and optional Memgraph knowledge graph via reciprocal rank fusion. 6 MCP tools: health, search, answer, feedback, graph_query, graph_add_triple. Self-hosted with Qdrant backend. 82.5% strict accuracy on LoCoMo benchmark. `pip install 'mnemostack[mcp]'`
vassiliylakhonin/agenda-intelligence-md
Auditable strategic-risk memos for AI agents — sanctions, regulatory, geopolitics, trade. Geography-routed regional specialists (Central Asia/Caspian, Gulf/Middle East), per-claim evidence discipline, schema-validated output, machine-verified audit. No live data retrieval. PyPI: `agenda-intelligence-md`.
Zhonghao1995/Agentic-MIKE-Plus
MCP server (10 tools) for a headless, natural-language DHI MIKE+ urban-water modelling workflow: model inspection, parameter read/edit, headless simulation runs with parsed QA status, `.res1d` results reading, and plotting (hydrographs, time series, network maps). Read/plot is license-free; run/edit need Windows + a MIKE+ 2026 license. Works with Claude Code, Codex, OpenClaw, and Hermes.
AndreLYL/memkin
Local-first personal memory for AI agents. Ingests Feishu/Lark chats and Claude Code / Codex sessions, distills them into a private entity knowledge graph (people, projects, decisions, tasks), and serves it to any agent over MCP — read and write. `npx memkin`
michaelellis003/paperboy
Send research papers from Claude to a Kindle or Kobo, with Zotero as the source of truth. Searches arXiv and OpenAlex, recommends related work via the Semantic Scholar citation graph, queues papers in a Zotero collection, and delivers the PDFs by email or Dropbox. Receipts report file sizes and name anything that could not be sent.
smaniches/alphafold-sovereign-mcp
AlphaFold MCP server integrating AlphaFold DB with eight additional public biomedical data sources, backed by a local SQLite knowledge graph for structural-confidence, variant, disease/phenotype, drug-target, and orthology workflows. `uvx alphafold-sovereign-mcp`
gingugu/gingugu
Persistent memory for AI coding assistants. Local SQLite, no cloud. 16 MCP tools: store, recall, search, relate, consolidate, export, and credential vault (OS keychain). Typed memories with confidence lifecycle (verified/inferred/stale/deprecated), namespaces, knowledge graph, and hybrid BM25 + semantic search via fastembed ONNX. Works with Cursor, Windsurf, Claude, and any MCP client. `pip instal
leesgit/passbaton
Zero-config session continuity for Claude Code, OpenAI Codex CLI & Google Gemini CLI, sharing one local db. Auto context injection on start, compaction handover, and 24 tools for memory, tasks, solutions, and a knowledge graph. Multilingual semantic search (94+ languages), 100% local, $0 API cost. `npm i -g passbaton`
goklab/guardvibe
Security MCP for vibe coding with 330 rules and 29 tools. Purpose-built for AI-generated code — scans Next.js, Supabase, Clerk, Stripe, Prisma, Hono, GraphQL, and 25+ modules. Cross-file taint analysis, host security audit, auto-fix, SARIF export, pre-commit hook, and CVE version detection. Zero config, runs locally.
ChrisGVE/workspace-qdrant-mcp
Project-scoped semantic workspace memory for AI coding assistants. Watches your project files, auto-indexes code and docs into Qdrant with tree-sitter semantic chunking, LSP integration, and hybrid search (dense + sparse + RRF). 6 MCP tools: store, search, retrieve, grep, list, rules. **Alpha** — testers and feedback welcome.
geondongkim/geond-agent-protocol
Local-first shared memory and coordination layer for AI coding agents: repository evidence, reservations, handoffs, code graph context, and dashboard review backed by PostgreSQL/pgvector.
teampolarity/cosmos-mcp
Personal knowledge graph shared across MCP clients. Account-keyed and portable as a `.polarity` file, with sources for iMessage, browser history, calendar, Claude Desktop transcripts, shell history, Notion, and Obsidian. `npx -y @polarity-lab/cosmos-mcp`
yamantaka520/Agent-Memory-OS
Local-first memory engine for AI-agent teams: private/team/project ACL (a hard gate before ranking), associative recall, and federated sync where revocation propagates across nodes. SQLite + FTS5, no LLM required; MCP server + web console included. `pip install 'agent-memory-os[mcp]'`
redleaves/context-keeper
LLM-driven context and memory management with wide-recall + precise-reranking RAG architecture. Features multi-dimensional retrieval (vector/timeline/knowledge graph), short/long-term memory, and complete MCP support (HTTP/WebSocket/SSE).
tstockham96/engram
Intelligent agent memory with semantic recall, automatic consolidation, contradiction detection, and bi-temporal knowledge graph. 80% on LOCOMO benchmark using 96% fewer tokens than full-context approaches.
Zacccck/Claude-MCP-Read-Email-Attachments
Remote HTTP MCP server that reads Outlook email attachments via Microsoft Graph. Parses PDF, Word (with embedded image extraction for multimodal analysis), Excel, and text files in-memory and returns structured content directly to Claude.
maxkuminov/obsidian-mcp
Self-hosted MCP server for Obsidian with semantic + full-text search over PostgreSQL/pgvector, wikilink graph traversal, atomic note CRUD, OAuth 2.0, and a self-describing vault guide.
laszlopere/mcp-bytesmith
Local byte-wrangling toolbox: encoding (hex/Base64/Base32/Base58/Base45…), cryptographic + CRC hashing, base conversion, and CSPRNG tokens/passphrases, plus an opt-in Ethereum/EVM toolset (keccak, ABI/RLP codecs, EIP-191/712 hashing, function/event selectors, EIP-55). No network calls. `uvx mcp-bytesmith`.
SurajKGoyal/amnesic
The MCP server that remembers your database — persists table/column annotations, an FK relationship graph, and searchable notes across sessions, so the model stops re-discovering your schema every time. PostgreSQL, MySQL, MSSQL, SQLite; read-only-enforced.