Semantic Search MCP
Semantische Suche
Semantische Suche über Markdown-Dateien. Finden Sie verwandte Notizen nach Bedeutung, nicht nur nach Schlüsselwörtern. Erkennen Sie Duplikate, bevor Sie neue Notizen erstellen.
Unterstützt zwei Server-Transportwege:
stdio MCP — Für die Claude Code-Integration (ein Prozess pro Sitzung)
HTTP — Kombiniertes MCP-über-HTTP + REST auf einem Port; ein warmer Prozess, der von allen Clients geteilt wird
Funktionen
Semantische Suche mittels sentence-transformers
Erkennung von doppelten/ähnlichen Notizen
Automatische Index-Aktualisierung mit Datei-Überwachung
Unterstützung für mehrere Verzeichnisse
Inline-Tag-Extraktion (
#tag-name)
Related MCP server: mcp-recall-md
Installation
CPU-only Installation — empfohlen für macOS (jeder Mac, Apple Silicon oder Intel) und Linux/Windows ohne NVIDIA GPU. Spart ca. 5 GB an CUDA-Binärdateien. Unter macOS wird die Apple GPU (MPS) weiterhin automatisch erkannt und über das in PyTorch integrierte MPS-Backend genutzt — das Label "CPU" bezieht sich nur auf das Fehlen von CUDA, nicht auf das Rechengerät zur Laufzeit.
uv tool install --index https://download.pytorch.org/whl/cpu \
git+https://github.com/bborbe/semantic-searchCUDA-Installation — nur für Linux/Windows mit einer dedizierten NVIDIA GPU. Nicht anwendbar auf macOS (NVIDIA CUDA wird auf dem Mac nicht unterstützt).
uv tool install git+https://github.com/bborbe/semantic-searchUpgrade
uv tool upgrade semantic-searchServer-Modi
stdio MCP (pro Sitzung Claude Code)
Startet einen Prozess pro Claude Code-Sitzung. Einfach, aber jede Sitzung lädt ihre eigene ~400 MB–1 GB Modellkopie.
claude mcp add -s project semantic-search \
--env CONTENT_PATH=/path/to/vault \
-- \
uvx --from git+https://github.com/bborbe/semantic-search semantic-search-mcpVerfügbare Tools:
search_related(query, top_k=5)— Findet semantisch verwandte Notizencheck_duplicates(file_path)— Erkennt doppelte/ähnliche Notizen
HTTP (geteilt über alle Clients)
Ein einzelner, lang laufender Prozess stellt MCP-über-HTTP unter /mcp sowie REST unter /search, /duplicates, /health, /reindex bereit. Alle Claude Code-Sitzungen und REST-Clients teilen sich einen warmen Indexer.
CONTENT_PATH=/path/to/vault semantic-search-http --host 127.0.0.1 --port 8321Verweisen Sie Claude Code über die MCP-Konfiguration darauf:
{
"mcpServers": {
"semantic-search": {
"type": "http",
"url": "http://127.0.0.1:8321/mcp"
}
}
}REST-Endpunkte:
Endpunkt | Methode | Beschreibung |
| POST | MCP-über-HTTP (Claude Code) |
| GET | Semantische Suche |
| GET | Findet doppelte Notizen |
| GET | Gesundheitsprüfung mit Index-Statistiken |
| GET/POST | Erzwingt den Neuaufbau des Index |
Beispielabfragen:
# Search
curl 'http://127.0.0.1:8321/search?q=kubernetes+deployment'
# Find duplicates
curl 'http://127.0.0.1:8321/duplicates?file=notes/my-note.md'
# Health check
curl 'http://127.0.0.1:8321/health'Claude Code Plugin
Dieses Repo wird auch als Claude Code Marketplace-Plugin mit Befehlen für Einrichtung, Suche und Recherche ausgeliefert.
Installation
claude plugin marketplace add bborbe/semantic-search
claude plugin install semantic-searchUpdate
claude plugin marketplace update semantic-search
claude plugin update semantic-search@semantic-searchSchnellstart
# One-shot interactive setup: installs the binary, writes the launchd/systemd
# unit, registers the MCP server in your Claude config.
/semantic-search:configure
# Search indexed markdown
/semantic-search:search kubernetes deployment
# Multi-step research across results
/semantic-search:research kafka backup strategyBefehle
Befehl | Beschreibung |
| Installiert |
| Semantische Suche über den laufenden MCP-Server |
| Mehrstufige Recherche — suchen, kategorisieren, Top-Quellen lesen, synthetisieren |
Im Hintergrund ausführen
Für den produktiven Einsatz führen Sie semantic-search-http als Hintergrunddienst aus, damit jede Claude Code-Sitzung (und jeder REST-Client) einen warmen Prozess teilt.
Plattform | Anleitung |
macOS (launchd) | |
Linux (systemd) |
Kurzes Beispiel (macOS):
launchctl load ~/Library/LaunchAgents/com.github.bborbe.semantic-search-http.plistKurzes Beispiel (Linux):
systemctl --user enable --now semantic-search-http.serviceCLI-Befehle
Einmalige Befehle ohne laufenden Server:
# Search
CONTENT_PATH=/path/to/vault semantic-search search "kubernetes deployment"
# Find duplicates
CONTENT_PATH=/path/to/vault semantic-search duplicates path/to/note.mdBinärdateien
Binärdatei | Zweck |
| Kombinierter HTTP-Server — MCP unter |
| stdio MCP-Server — einer pro Claude Code-Sitzung. Verwenden, wenn kein HTTP-Dienst eingerichtet ist. |
| Nur CLI — |
Konfiguration
Umgebungsvariablen
Variable | Beschreibung | Standard |
| Zu indexierendes Verzeichnis (durch Kommas getrennt für mehrere) |
|
| Logging-Level (DEBUG, INFO, WARNING, ERROR) |
|
Mehrere Verzeichnisse
Indexieren Sie mehrere Verzeichnisse, indem Sie die Pfade mit Kommas trennen:
CONTENT_PATH=/path/to/vault1,/path/to/vault2,/path/to/docsAlle Verzeichnisse werden zusammen indexiert und als ein einheitlicher Index durchsucht.
Funktionsweise
Der erste Durchlauf lädt ein kleines Embedding-Modell (~90 MB) herunter und indexiert Ihre Markdown-Dateien (<1s für typische Vaults). Der Index aktualisiert sich automatisch, wenn Dateien über den Dateisystem-Watcher geändert werden.
Indexierte Inhalte
Jede Markdown-Datei wird mit gewichteten Komponenten indexiert:
Komponente | Gewichtung | Notizen |
Dateiname | 3x | |
Frontmatter | 3x | |
Frontmatter | 2x | Zusammengeführt mit Inline-Tags |
Frontmatter | 2x | |
Inline-Tags ( | 2x | Aus dem Text extrahiert |
Erste H1-Überschrift | 2x | |
Textinhalt | 1x | Erste 500 Wörter |
Entwicklung
# Clone
git clone https://github.com/bborbe/semantic-search
cd semantic-search
# Install dev dependencies
make install
# Run checks
make check
# Run tests
make testLizenz
BSD 2-Clause License — siehe LICENSE.
Available Tools
3 toolscheck_duplicatesA
Find notes that are potential duplicates of the given file.
| Name | Required | Description | Default |
|---|---|---|---|
| file_path | Yes | Path to the file (absolute or relative to content directory) |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, and the description does not disclose behavioral details beyond the basic 'Find' action—such as how duplicates are determined, whether the operation is read-only, or any side effects. The burden falls on the description, which is minimal.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, front-loaded sentence with no wasted words, making it highly concise and easy to parse.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (one parameter, output schema present), the description conveys the main purpose adequately. However, it lacks guidance on when to use vs alternatives, which is somewhat a gap but not critical for such a straightforward tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% for the single parameter, so the schema fully describes file_path. The description adds no extra semantic meaning beyond what the schema already states.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description uses a specific verb ('Find') and resource ('notes that are potential duplicates of the given file'), clearly distinguishing it from sibling tools like search_related and get_content.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage for checking duplicates but does not explicitly state when to use this tool versus alternatives, nor any exclusions or prerequisites.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_contentB
Fetch the content of a file from the indexed vault.
| Name | Required | Description | Default |
|---|---|---|---|
| path | Yes | File path (absolute or relative to an indexed root) | |
| query | No | Search string to find the best-matching line (only used when snippet=True) | |
| snippet | No | If True, return a snippet around the best-matching line instead of the full file | |
| context_lines | No | Number of lines before and after the match to include (default 20) |
Output Schema
| Name | Required | Description |
|---|---|---|
No output parameters | ||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states the primary action but does not disclose edge cases (e.g., file not found, path resolution), or behavior around optional parameters like snippet and query despite their existence in the schema. This leaves significant behavioral aspects undisclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, tightly worded sentence that immediately conveys the core purpose. There is no fluff or redundancy, and the information is front-loaded. For the tool's purpose, this length is appropriately concise.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The tool has moderate complexity with optional snippet/query parameters and an output schema, and the schema covers parameter semantics. However, the description is thin on operational context, such as how path resolution works or when to use snippet mode. While not incomplete for basic selection, the description itself needed to provide more contextual glue; the schema partially compensates, but gaps remain.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so a baseline of 3 is appropriate. The description itself does not add any parameter semantics beyond the schema, but the schema already documents each parameter (path, query, snippet, context_lines) clearly. The description neither enhances nor detracts from what the schema provides.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's action ('Fetch the content of a file') and the resource ('indexed vault'), using a specific verb and resource. It distinguishes itself from sibling tools 'search_related' and 'check_duplicates' by focusing on direct content retrieval rather than search or duplication checks.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides no guidance on when to use this tool versus alternatives. It does not mention related tools or any exclusionary conditions (e.g., 'use search_related instead when looking for related content'). The intended usage is only implicitly derived from the tool's name and action.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
3 tool updates
v0.1.0- First observed
check_duplicates - First observed
get_content - First observed
search_related
TDQS
Scored across 3 tools
Each tool serves a distinct purpose: semantic search, duplicate detection, and content retrieval. There is no overlap or ambiguity between them.
All tool names follow a consistent verb_noun pattern (search_related, check_duplicates, get_content) using snake_case. The naming is predictable and readable.
Three tools is an appropriate, focused set for a semantic search server. Each tool earns its place and the scope is well-defined.
The server covers the core needs of semantic search: finding related notes, detecting duplicates, and retrieving content. There are no missing operations that would hinder its stated purpose.
Maintenance
Related MCP Connectors
Search and reason over your Obsidian-style Markdown vault, right from ChatGPT.
Personal context for every AI: search, read, and write back to your private Markdown library.
Search your Obsidian vault to quickly find notes by title or keyword, summarize related content, a…
Markdown notes in folders, with files, that your AI assistant can read, write and organise.
Related MCP Servers
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- AlicenseAqualityCmaintenanceEnables semantic search over local markdown note collections using vector embeddings, with real-time file watching and zero-config setup.4MIT
- FlicenseNot gradedqualityDmaintenanceEnables managing and searching markdown notes with semantic search, question answering, and note generation, and provides an MCP server for GitHub Copilot integration.4-
- AlicenseNot gradedqualityCmaintenanceEnables semantic search over an Obsidian vault using natural language, retrieving relevant notes and extracted conclusions.MIT