Obsidian OmniSearch MCP Server

MCP server integrating with Obsidian's OmniSearch plugin to provide semantic and full-text search across an Obsidian vault. Enables AI agents to search notes, find related content, and retrieve knowledge from Obsidian personal knowledge bases using OmniSearch's indexing capabilities.

Evaluated Mar 06, 2026 (0d ago) vcurrent

Homepage ↗ Repo ↗ Productivity obsidian omnisearch pkm notes search knowledge-management mcp-server

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

Local access only. Personal vault may contain sensitive notes. No remote exposure.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

An Obsidian power user with the OmniSearch plugin installed wants AI agents to search and retrieve content from their personal knowledge base as context for writing, research, or question-answering.

Avoid When

You don't use Obsidian with the OmniSearch plugin. Requires both Obsidian running and OmniSearch plugin active.

Use Cases

• Searching an Obsidian vault for relevant notes from AI research and writing agents
• Finding related content and backlinks in Obsidian knowledge bases via AI agents
• Integrating personal Obsidian notes into AI-assisted research and writing workflows
• Querying OmniSearch index for semantic search across PKM content

Not For

• Users without Obsidian and OmniSearch plugin installed
• Non-Obsidian note-taking systems (Notion, Roam, Logseq)
• Shared team knowledge bases (Obsidian is primarily personal PKM)

Interface

REST API

Yes

GraphQL

gRPC

MCP Server

Yes ↗

SDK

Webhooks

Authentication

Methods: none

OAuth: No Scopes: No

No authentication — connects to local Obsidian OmniSearch plugin API (localhost). Obsidian must be running.

Pricing

Model: free

Free tier: Yes

Requires CC: No

Obsidian is free for personal use. OmniSearch plugin is free. MCP server is free open source.

Agent Metadata

Pagination

none

Idempotent

Full

Retry Guidance

Not documented

Known Gotchas

⚠ Requires Obsidian app running with OmniSearch plugin active and API enabled — not always-on
⚠ OmniSearch API must be enabled in plugin settings (not default) — check plugin configuration
⚠ Search results depend on OmniSearch index freshness — newly added notes may not appear immediately
⚠ Local-only access — cannot search vault remotely unless Obsidian is accessible

Alternatives

obsidian-mcp-server-enhanced notion-mcp-server logseq-mcp-server

Full Evaluation Report

Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Obsidian OmniSearch MCP Server.

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Scores are editorial opinions as of 2026-03-06.