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AI agent tools for knowledge base and RAG

In this catalog, a knowledge base and RAG tool is one that indexes documents and retrieves relevant passages for an agent (RAG, vector search). Our enrichment pass tags 305 listings with it: 141 MCP servers, 21 agent skills, 23 plugins, 20 agent frameworks, 82 AI agents and 18 no-code agent builders. By listing rank, the top MCP server is Repomix, the top plugin is SpecStory and the top AI agent is rowboat. 9 of the 305 are published by the vendor behind the product, and 191 were active in the last 30 days. 19 of the 141 MCP servers run only as remote servers, with nothing to install locally. Each entry below links to its listing page, with grades, install commands and sources.

Updated Oct 26, 2026 · Built from catalog data; how we rank and grade

What the job is

Tagged listings
305
By type
141 MCP servers, 21 agent skills, 23 plugins, 20 agent frameworks, 82 AI agents and 18 no-code agent builders
Published by the vendor
9 of 305
Active in the last 30 days
191 of 305
Open source
197 of 305
MCP servers that run only remotely
19 of 141
Hosts named by the MCP servers
Claude Code (134), Cursor (134), VS Code (134)

Building blocks by type

The top entries of each type, by listing rank. Open a listing for its install command, grades and sources.

MCP servers 141 tagged

  1. 1
    Repomix

    yamadashy

    Pack local or remote codebases into AI-friendly files that LLMs and coding agents can read or search

    • 29K GitHub stars
    • Active in the last 30 days
    • Open source (MIT)

    ★ 29KLast active Oct 24, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  2. 2
    screenpipe

    screenpipe

    Search your local screen recordings, audio transcripts, and computer activity from screenpipe.

    • 22.1K GitHub stars
    • Active in the last 30 days

    ★ 22.1KLast active Oct 21, 2026Local (stdio)Claude Code, Codex, VS Code, Cursor +2

  3. 3
    Codebase Memory

    DeusData

    Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

    • Most GitHub stars here (47,374)
    • Most weekly downloads here (2.5K)
    • Active in the last 30 days

    ★ 47.4K↓ 2.5K/wkLast active Oct 22, 2026Local (stdio)Claude Code, Codex, VS Code, Claude Desktop +2

  4. 4
    Agent-Native Brain

    BuilderIO

    Cited company knowledge from Slack, meetings, transcripts, and decisions

    • 7.5K GitHub stars
    • Remote server, no local install
    • Active in the last 30 days

    ★ 7.5KLast active Oct 24, 2026Remote (HTTP)Claude Code, VS Code, Cursor, Windsurf

  5. 5
    fojin — Buddhist Canon Tools

    fojin.app

    Buddhist canon tools: search, passages, cross-canon parallels, dictionaries — all URN-cited.

    • Remote server, no local install
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 352Last active Oct 24, 2026Remote (HTTP)Claude Code, VS Code, Cursor, Windsurf

Search MCP servers for knowledge base and RAG → All connectors

Agent skills 21 tagged

  1. 1
    knowledge-agent

    thedotmack

    Build and query AI-powered knowledge bases from claude-mem observations.

    • Largest repository here (102,760 stars)
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 102.8KLast active Oct 23, 2026Claude Code, Claude apps, Codex, Cursor +6

  2. 2
    howtolivelonger

    geekan

    Look up research on longevity, diet, exercise, sleep and everyday habits in the HowToLiveLonger JSON dataset.

    • Repository has 35.8K stars
    • Active in the last 30 days
    • Open source (Unlicense)

    ★ 35.8KLast active Oct 22, 2026Claude Code, Claude apps, Codex, Cursor +6

  3. 3
    lean-ctx

    yvgude

    Use LeanCTX Context Gateway tools to select task-relevant code context, apply supported controls, reuse local knowledge and inspect recorded evidence.

    • Repository has 3.9K stars
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 3.9KLast active Oct 19, 2026Claude Code, Claude apps, Codex, Cursor +6

  4. 4
    dbs-knowledge

    dontbesilent2025

    把本地文件夹建成 Agent 可稳定查找、收录和维护的知识库，并支持导航、版本判断、健康检查及 SOT 分层治理。用户要求搭建、查询、更新、整理或瘦身知识库时使用。

    • Repository has 10.9K stars
    • Active in the last 30 days

    ★ 10.9KLast active Oct 18, 2026Claude Code, Claude apps, Codex, Cursor +6

  5. 5
    nvidia-ontology-management

    NVIDIA <opensource@nvidia.com>

    Model and publish semantic definitions in Auto Ontology.

    • Repository has 3.7K stars
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 3.7KLast active Oct 8, 2026Claude Code, Claude apps, Codex, Cursor +6

Search agent skills for knowledge base and RAG → All skills

Plugins 23 tagged

  1. 1
    SpecStory

    SpecStory

    Save, export, search and share AI chat history from Cursor, VS Code Copilot, Claude Code, Codex, Gemini, OpenCode and more

    • 1.4K GitHub stars
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 1.4KLast active Oct 23, 2026VS Code, Cursor, Windsurf, VSCodium

  2. 2
    SocratiCode

    giancarloerra

    Codebase context engine for VS Code's native MCP host.

    • Most GitHub stars here (3,354)
    • Active in the last 30 days
    • Open source (AGPL-3.0)

    ★ 3.4KLast active Oct 23, 2026VS Code, Cursor, Windsurf, VSCodium

  3. 3
    Context-Engine.AI

    context-engine

    Supercharge your AI coding assistants with rich codebase context.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 401Last active Oct 22, 2026VS Code, Cursor, Windsurf, VSCodium

  4. 4
    Kote

    kote

    Integrate your Kote directly into VS Code — search, ask AI, save notes without leaving your editor.

    • Active in the last 30 days
    • Open source (MIT)

    ★ 19Last active Oct 24, 2026VS Code, Cursor, Windsurf, VSCodium

Search plugins for knowledge base and RAG → All plugins

Agent frameworks 20 tagged

  1. 1
    LlamaIndex

    LlamaIndex

    Open-source Python toolkit for RAG and agents over your own data, with event-driven workflows and 300+ integration packages.

    • 52.6K GitHub stars
    • Active in the last 30 days
    • Open source (MIT)

    ★ 52.6K↓ 1.4M/wkLast active Oct 14, 2026

  2. 2
    Haystack

    deepset

    Open-source Python framework from deepset for modular pipelines and agent workflows covering retrieval, tool use and generation.

    • 26.8K GitHub stars
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 26.8K↓ 145.3K/wkLast active Oct 24, 2026

  3. 3
    LangChain

    LangChain

    Python framework of interoperable components and integrations for building agents and LLM apps, with LangGraph and Deep Agents layered above it.

    • Most GitHub stars here (148,371)
    • Most weekly downloads here (37.3M)
    • Active in the last 30 days

    ★ 148.4K↓ 37.3M/wkLast active Oct 24, 2026

  4. 4
    PageIndex

    VectifyAI

    Python library that builds a tree index of long documents and has an LLM reason through it to retrieve answers, without a vector database or chunking.

    • 39.6K GitHub stars
    • Active in the last 30 days
    • Open source (MIT)

    ★ 39.6K↓ 43.6K/wkLast active Oct 24, 2026

Search agent frameworks for knowledge base and RAG → All harnesses & sdks

AI agents 82 tagged

  1. 1
    rowboat

    rowboatlabs

    Open-source desktop assistant that builds a knowledge graph from your work and runs background agents on events or schedules

    • 18.1K GitHub stars
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 18.1KLast active Oct 23, 2026

  2. 2
    PaperQA2

    FutureHouse

    Retrieval augmented generation package that answers questions from scientific papers and documents with citations.

    • 9.5K GitHub stars
    • Most weekly downloads here (30.7K)
    • Open source (Apache-2.0)

    ★ 9.5K↓ 30.7K/wkLast active Aug 12, 2026

  3. 3
    Khoj

    Khoj

    Self-hostable personal AI app that answers from the web and your documents, runs custom agents and scheduled research automations.

    • Most GitHub stars here (37,804)
    • Open source (AGPL-3.0)

    ★ 37.8K↓ 1.3K/wkLast active Aug 2, 2026

  4. 4
    Octop

    TencentCloud

    Self-hosted AI assistant for multiple users and agents, reachable from a web dashboard and chat apps.

    • 10.9K GitHub stars
    • Active in the last 30 days
    • Open source (MIT)

    ★ 10.9KLast active Oct 18, 2026

  5. 5
    yao

    YaoApp

    Self-hosted workspace and task board for running your agents across the devices you own.

    • 8.2K GitHub stars
    • Active in the last 30 days

    ★ 8.2KLast active Oct 19, 2026

Search AI agents for knowledge base and RAG → All agents

No-code builders 18 tagged

  1. 1
    RAGFlow

    InfiniFlow

    Open-source RAG engine under Apache-2.0 with a visual agent builder, hybrid search and a data ingestion pipeline

    • Most GitHub stars here (92,809)
    • Active in the last 30 days
    • Open source (Apache-2.0)

    ★ 92.8KLast active Oct 24, 2026

  2. 2
    FastGPT

    Labring

    Open-source AI agent platform with a knowledge base, drag-and-drop workflows, MCP support and Docker self-hosting or a cloud service

    • 29.9K GitHub stars
    • Active in the last 30 days

    ★ 29.9KLast active Oct 24, 2026

  3. 3
    MaxKB

    FIT2CLOUD

    Open-source, GPL-3.0 platform for building agents with RAG pipelines, a workflow engine and MCP tool use, run from a Docker container

    • 23K GitHub stars
    • Active in the last 30 days
    • Open source (GPL-3.0)

    ★ 23KLast active Oct 22, 2026

Search no-code builders for knowledge base and RAG → All no-code builders

Example stacks

Combinations the catalog links as working together. These are examples built from public relations between listings, not recommendations by any vendor.

For business buyers: agents with stated pricing

Only agents whose listing states pricing are shown, with what the listing says. Check the publisher's pricing page before you buy.

AgentPricing in its listingSource
eesel AIeesel AIFreemium with a free tier; $0 to $5,000 per month; pricing page checked Oct 2026Pricing page
kapa.aikapa.aiUsage-based; $0 per month; pricing page checked Oct 2026Pricing page

Questions

What are the top tools for knowledge base and RAG?
By listing rank, the top MCP server is Repomix, the top plugin is SpecStory and the top AI agent is rowboat. Rank weighs adoption, freshness, documentation and publisher identity; money never changes it.
How many tools does the catalog list for knowledge base and RAG?
305 listings are tagged for it: 141 MCP servers, 21 agent skills, 23 plugins, 20 agent frameworks, 82 AI agents and 18 no-code agent builders. Tags come from an automated enrichment pass over the top-ranked listings, so tools outside that pass are not counted.
Which AI apps do the MCP servers work with?
Of the 141 MCP servers, 134 list Claude Code, 134 list Cursor and 134 list VS Code as a supported host. Open a listing for its install command and the other hosts it names.
Do the AI agents for knowledge base and RAG cost money?
Pricing is stated for 2 of the 82 agents: eesel AI (freemium with a free tier), kapa.ai (usage-based). The other agents state no pricing in their listings.

305 listings are tagged for this use case; the lists above show the top entries.

Related