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MCP servers tagged retrieval
119 live MCP servers tagged "retrieval", ranked by trust score. Tags come from package metadata and repository topics, so this list covers servers across every category that work with retrieval.
Bm25s
Fast BM25 search in Python, powered by Numpy and Numba
jcdickinson/simplemem
[ICML'26] SimpleMem: Efficient Lifelong Memory for LLM Agents — Text & Multimodal
Semble
Fast and Accurate Code Search for Agents. Uses ~98% fewer tokens than grep+read
Engrim
The Universal Cross-Model Episodic Memory Standard. Local-first, project-scoped SQLite memory engine for Google Antigravity, Claude Code, Cursor, Windsurf, and Codex. Zero cloud l…
Sidekick
Local coding-agent orchestrator — DAG of auto-approved, git-worktree-isolated sub-sessions across LLM providers (Claude/Kimi/Grok/DeepSeek/local). AGPL-3.0.
Atomicmemory
Portable semantic memory for AI agents: core engine, TypeScript SDK, framework adapters, MCP server, CLI, and host plugins.
Redevops Rag
Hybrid RAG (DuckDB vector + BM25 + RRF + recency/keyword priors + optional cross-encoder rerank) as an installable library + CLI.
Primitive Bench
The marketplace for verifiable AI outcomes: state a task, get a fixed price upfront, and Primitive Bench routes across tools to complete it, refunded if the outcome isn't delivere…
Agentmemory
Public fork of rohitg00/agentmemory focused on Docker-first local deployment, Codex-native lifecycle ingestion, freshness-oriented retrieval, diagnostics.
Context Runtime
Context Runtime — a database query planner for LLM context. Decides what a model sees before it answers; plans it, runs it through reused substrate, and learns from the outcome.
Ctxd
Your AI agents can't see your files. ctxd connects your cloud data and makes it searchable via API, CLI, or MCP.
Claudette
Claudette: an AI that answers only from women's writing. Claude, like every LLM, was built mostly by men and trained mostly on text by men; this redresses the balance a little. Pu…
Index
Mintlify Index: retrieval engine and MCP server. Install: npx mint index
Kb Arena
Benchmark 19 retrieval architectures (vector, contextual, QnA, knowledge graph, LightRAG, hybrid, RAPTOR, PageIndex, BM25, metadata-filtered, temporal, rerank, HyDE, multi-query,…
Knowl
Service-first LLM wiki knowledge service for MCP, HTTP, and Go/Fx embedding
The MCP Company
TheMCPCompany: Creating General-purpose Agents with Task-specific Tools
Ennoia
Declarative Document Indexing (DDI) framework for Python. Define schemas, extract structured indices, search smarter.
Sweet Search
Local code search for AI agents: six fast, purpose-built tools that return ranked answers, not raw grep. Because maybe grep isn't all you need... 🍬
Ken
Fast hybrid code search for agents. Pure Go, drop-in MCP-compatible with semble.
Context Router
Memory-aware context engine for AI coding agents — up to 91% fewer tokens, 17/18 rank-1 across 6 OSS projects. MCP-native, multi-repo, with persistent observations & decisions.
Tagmem
Structured local memory storage and retrieval for LLM agents
Kibble
chew through any source into clean datasets! a fast ingestion, RAG & fine-tuning toolkit
Whoosh
Fast, pure-Python full-text indexing and search. Actively maintained continuation of Whoosh / whoosh-reloaded. Install: pip install whoosh3
FERNme
A lightweight memory engine for AI agents using fuzzy graphs, Hebbian updates, and optional LLM gating.
Mneme MCP Server
MCP server for mneme: 9 tools for vault-native memory in Claude Code and MCP-compatible clients.
LBrain
BETA — Local-first memory for AI agents. Serves records with their source, date, and whether they actually answer the question. No account, no API key, nothing leaves your machine.
Contextmaxxer
Fully local MCP retrieval tool for coding agents. 161M encoder, ~1s per tool call, no API, no LLM in the query path. No file reads: line numbers, callers, callees and exact call s…
Legal Kb Builder
本地法律知识库建设一体化工厂 — 从 PDF/DOCX/图片到可对外服务的业务咨询智能体，一个包搞定
Omnex
Universal retrieval. Structure-aware. Token-efficient.
Cfetch
Local-first AI agent memory and context engine for Claude Code, Codex, Gemini and MCP: cited Markdown recall, code search, hooks and cross-machine serving.
Dir2mcp
Turn any folder into an MCP knowledge server: local-first indexing, hybrid search, answers with span-level citations.
Callsieve
Local code retrieval for AI coding agents. Rust CLI and MCP server with indexing, compact context, and reproducible evaluation tools.
Bsl Search
Read-only MCP server for 1C BSL code search: hybrid BM25 + vector kNN retrieval over methods in Elasticsearch, RRF, dedup, rerank — context for code LLMs. | MCP-сервер поиска по к…
Aletheia Memory
Local, auditable memory for AI agents.
Knowlp Rag
KnowLP-RAG: dual knowledge-graph RAG for Markdown notes — dsh plugin add @eqman00003/knowlp-rag · MCP + native Cordis plugin for DeepSeek Harness (dsh) & Claude Code
Graph Mempalace Plugin
Claude Code plugin: a knowledge base of your project's conversations and code that builds and updates itself (MemPalace + Graphify)
Indexa
The local context engine for AI. Summarizes every file, rolls folders up into whole-project context, and serves any AI tool (Claude Code, Cursor, local models) a ranked slice over…
Prbe Knowledge
Self-hosted knowledge engine: ingest your team's tools, hybrid (vector+keyword+graph) retrieval, cited LLM answers.
Ops Incident Core
Collector-first engineering evidence backend for deterministic ingestion, Qdrant retrieval, cited investigation, readiness reports, workflows, evals, and Core MCP. Azure deploymen…
XfeaturesAthenaeum
One authenticated knowledge and retrieval service for AI agents: D1 facts, R2 documents and AI Search behind a single REST, Workers RPC and MCP interface, with per-caller access c…
Tokenpak
Local proxy that puts the right project context in front of the model before it starts working — with a receipt for what was added
Madosho
a headless retrieval backend. Serves traditional RAG via a tool server or OpenAI shim, drive it from agents over MCP, CLI, or skills, run autonomous research subagents, and rate a…
Intently
Intent-first search that finds the right tool from a vague description. Hybrid retrieval over LLM-written cards, LLM rerank with recall safety, MCP server for AI agents, runs on a…
Constellate
Three knowledge planes (embedded, unified, composed) behind one retrieval contract, benchmarked head-to-head on MovieLens ml-25m. Relational, vector, and graph fusion, an MCP cont…
Grounded Context
Grounded, auditable context layer for enterprise agents: a deterministic path for exact facts + Elasticsearch hybrid retrieval for exploration, exposed over MCP. Every answer carr…
Awesome Agent Search
Research and best practices for bringing web search into Codex, Claude Code, OpenClaw, and AI coding agents.
Thalamus
A self-hosted, code-aware brain for coding agents — persistent memory linking why you did something to where it lives in the code, with the instruments to prove it helps.
Coremem
Git-diffable memory for AI agents — six-layer architecture, plain-text source of truth, Obsidian graph projection. MIT.
ANNPACK
Verifiable knowledge artifacts for AI agents — package, search, and prove exactly which source revision produced each retrieval.
Pensyve
Universal memory runtime for AI agents. 8-signal retrieval, multimodal memory, spaced-repetition decay, and procedural learning. Rust core with Python, TypeScript, Go SDKs + MCP s…