RAG and search: tools for developers

Retrieval-augmented tools, vector databases, embeddings and semantic search. An entry can appear under several use cases when its topics or description provide several explicit signals.

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125 entries in this view.

Tool ranking

Ranked by measured growth, normalized across sources. Raw values keep their source-specific window, shown under each tool; a change requires at least two snapshots from the last 7 days.

  1. 1

    MCP
    Active

    Obsidian MCP server: semantic search, knowledge graph, and vault editing. No plugin required.

    ↓ 61 downloads/weekTypeScriptLicense: Apache-2.0

      mcpmeasured growthOpen source ↗

      Install claude mcp add obsidian-brain -- npx obsidian-brain

      10GitHub starsstable
    • 2

      MCP
      Active

      Persistent local AI memory. SQLite + FTS5 + vector search, knowledge graph. No cloud, no API keys.

      ↓ 59 downloads/weekTypeScriptLicense: MIT

        mcpmeasured growthOpen source ↗

        Install claude mcp add local-memory-mcp -- npx @studiomeyer/local-memory-mcp

        11GitHub starsstable
      • 3

        MCP
        Active

        Code intelligence MCP server — impact analysis, semantic search, dependency graphs

        ↓ 57 downloads/weekPythonLicense: Apache-2.0

          mcpmeasured growthOpen source ↗

          Install claude mcp add flyto-indexer -- uvx flyto-indexer

          4GitHub starsstable
        • 4

          MCP
          Active

          Historical chart-pattern intelligence for AI agents. 25M+ embeddings, 19K+ symbols, 10y history.

          ↓ 56 downloads/weekPythonLicense: MIT

            mcpmeasured growthOpen source ↗

            Install claude mcp add chart-library -- uvx chartlibrary-mcp

            20GitHub starsstable
          • 5

            MCP
            Active

            High-performance knowledge graph MCP server for AI coding agents with semantic search.

            ↓ 50 downloads/weekRustLicense: MIT

              mcpmeasured growthOpen source ↗

              Install claude mcp add lain -- npx @spuentesp/lain-mcp

              6GitHub starsstable
            • 6

              MCP
              Active

              Local-first second brain with semantic search. Markdown notes indexed by a local ML model.

              ↓ 49 downloads/weekTypeScriptLicense: MIT

                mcpmeasured growthOpen source ↗

                Install claude mcp add memex -- npx @evan-moon/memex

                3GitHub starsstable
              • 7

                MCP
                Active

                Semantic search over IMAGIN.studio API documentation — CDN, API, integration guides, and more.

                ↓ 49 downloads/weekPythonLicense: Apache-2.0

                  mcpmeasured growthOpen source ↗

                  Install claude mcp add api-docs-mcp -- uvx imagin-studio-api-docs-mcp

                  1GitHub starsstable
                • 8

                  MCP
                  Dormant

                  Local semantic search — embedding-powered grep for files, zero external services.

                  ↓ 45 downloads/weekPythonLicense: MIT

                    mcpmeasured growthOpen source ↗

                    Install claude mcp add embgrep -- uvx embgrep

                    0GitHub starsstable
                  • 9

                    MCP
                    Dormant

                    30 GPU-powered AI services as MCP tools. LLM, image, video, audio, embeddings & more.

                    ↓ 43 downloads/weekJavaScriptLicense: MIT

                      mcpmeasured growthOpen source ↗

                      Install claude mcp add gpu-bridge -- npx @gpu-bridge/mcp-server

                      2GitHub starsstable
                    • 10

                      MCP
                      Dormant

                      MCP server for Obsidian Smart Connections. Semantic search using your vault's embeddings.

                      ↓ 42 downloads/weekTypeScriptLicense: MIT

                        mcpmeasured growthOpen source ↗

                        Install claude mcp add smart-connections -- npx @gogogadgetbytes/smart-connections-mcp

                        3GitHub starsstable
                      • 11

                        MCP
                        Dormant

                        MCP server for GigaChat — AI chat, embeddings, image generation (Russia)

                        ↓ 39 downloads/weekTypeScriptLicense: MIT

                          mcpmeasured growthOpen source ↗

                          Install claude mcp add gigachat-mcp -- npx @theyahia/gigachat-mcp

                          0GitHub starsstable
                        • 12

                          MCP
                          Active

                          BM25 search + tree navigation over markdown docs for AI agents. No embeddings, no LLM calls.

                          ↓ 36 downloads/weekTypeScriptLicense: MIT

                            mcpmeasured growthOpen source ↗

                            Install claude mcp add doctree-mcp -- npx doctree-mcp

                            1GitHub starsstable
                          • 13

                            MCP
                            Active

                            Knowledge base for Claude Code with semantic search, feed intelligence, and teams

                            ↓ 29 downloads/weekPythonLicense: NOASSERTION

                              mcpmeasured growthOpen source ↗

                              Install claude mcp add distillery-mcp -- uvx distillery-mcp

                              24GitHub starsstable
                            • 14

                              MCP
                              Active

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

                              ↓ 25 downloads/weekPythonLicense: MIT

                                mcpmeasured growthOpen source ↗

                                Install claude mcp add jitapi -- uvx jitapi

                                7GitHub starsstable
                              • 15

                                MCP
                                Dormant

                                31 MCP tools for ESG data extraction, PDF processing, vector search, and EU regulation analysis.

                                ↓ 23 downloads/weekPythonLicense: MIT

                                  mcpmeasured growthOpen source ↗

                                  Install claude mcp add esg-mcp-servers -- uvx esg-mcp-servers

                                  0GitHub starsstable
                                • 16

                                  MCP
                                  Dormant

                                  ZKshare stdio MCP: store/prove/share, semantic search, sandbox proxy to HTTPS /api/v1/context.

                                  ↓ 22 downloads/weekTypeScriptLicense: MIT

                                    mcpmeasured growthOpen source ↗

                                    Install claude mcp add zkshare -- npx zkshare-mcp

                                    0GitHub starsstable
                                  • 17

                                    MCP
                                    Active

                                    Minimal RAG-over-a-corpus MCP retrieval: search_knowledge returns cited chunks. Local embeddings.

                                    ↓ 17 downloads/weekPythonLicense: MIT

                                      mcpmeasured growthOpen source ↗

                                      Install claude mcp add rag-mcp -- uvx jaimenbell-rag-mcp

                                      0GitHub starsstable
                                    • 18

                                      MCP
                                      Dormant

                                      Knowledge API for AI agents — content, agent directory, model benchmarks, semantic search.

                                      ↓ 16 downloads/weekJavaScriptLicense: NOASSERTION

                                        mcpmeasured growthOpen source ↗

                                        Install claude mcp add voidfeed-mcp -- npx voidfeed-mcp

                                        0GitHub starsstable
                                      • 19

                                        MCP
                                        Dormant

                                        Local FAISS vector database for RAG with document ingestion, semantic search, and MCP prompts.

                                        ↓ 13 downloads/weekPythonLicense: MIT

                                          mcpmeasured growthOpen source ↗

                                          Install claude mcp add local-faiss-mcp -- uvx local-faiss-mcp

                                          33GitHub starsstable
                                        • 20

                                          MCP
                                          Abandoned

                                          MCP server for YandexGPT — completions, embeddings, classification, summarization (Russia)

                                          ↓ 36 downloads/weekTypeScriptLicense: MIT

                                            mcpmeasured growthOpen source ↗

                                            Install claude mcp add yandexgpt-mcp -- npx @theyahia/yandexgpt-mcp

                                            0GitHub starsstable
                                          • 21

                                            Agent
                                            Active

                                            The Memory Layer for AI Agents - Drop-in memory infrastructure for AI agents and apps. Context that persists. Built for production.

                                            PythonLicense: Apache-2.0
                                            • agentic-memory
                                            • agentic-memory-system
                                            • agents
                                            • ai
                                            • ai-agents

                                            githubmeasured growthOpen source ↗

                                            64 675GitHub stars+396 (+0.62 %)
                                          • 22

                                            Other
                                            Active

                                            The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.

                                            TypeScriptLicense: Apache-2.0
                                            • ai
                                            • alternative
                                            • auth
                                            • database
                                            • deno

                                            githubmeasured growthOpen source ↗

                                            108 815GitHub stars+271 (+0.25 %)
                                          • 23

                                            Other
                                            Active

                                            An intentionally vulnerable OWASP LLM Top 10 training platform for AI Security, Prompt Injection, RAG Security, Agent Security, and GenAI penetration testing.

                                            PythonLicense: MIT
                                            • agent-security
                                            • ai-security
                                            • ai-security-tool
                                            • artificial-intelligence
                                            • ctf

                                            githubmeasured growthOpen source ↗

                                            311GitHub stars+6 (+2.0 %)
                                          • 24

                                            Other
                                            Active

                                            Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI…

                                            TypeScriptLicense: MIT
                                            • ci
                                            • ci-cd
                                            • cicd
                                            • evaluation
                                            • evaluation-framework

                                            githubmeasured growthOpen source ↗

                                            24 797GitHub stars+146 (+0.59 %)

                                          Learning resources

                                          Ranked by measured growth, normalized across sources. These resources remain available separately and do not take part in the main tool ranking.

                                          1. 1

                                            awesome-llm-apps

                                            Skill
                                            ActiveOpen source ↗

                                            100+ AI Agents, Agent Skills and RAG Apps - Free and Open Source.

                                            PythonLicense: Apache-2.0
                                            • agents
                                            • llms
                                            • python
                                            • rag
                                            github

                                            Install git clone https://github.com/Shubhamsaboo/awesome-llm-apps ~/.claude/skills/awesome-llm-apps

                                            Resourcemeasured growth
                                            135 960GitHub stars+648 (+0.48 %)