LocalSynapse - Local File Search MCP Server

io.github.LocalSynapsePublished by GitHub account LocalSynapsev2.1.0Updated Oct 24, 2026

Offline AI-powered local file search. BM25 + semantic hybrid search across all documents.

VerifiedSTDIODesktop onlyFiles & Storage Knowledge & Memory

Server details

Identifier: io.github.LocalSynapse/localsynapse-mcp
Transport: STDIO
Runtime: Desktop only
Trust: Verified
Published: Sep 16, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified the GitHub account LocalSynapse for this listing. That does not show the account is the product's maker.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

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Overview

AI-generated overview

LocalSynapse is a local MCP server that gives an AI assistant offline, AI-powered search over the documents on your machine, combining BM25 and semantic hybrid.

What you can do: Search local documents with an offline, AI-powered search engine that runs on your machine rather than in the cloud. Combine keyword ranking (BM25) with semantic matching in a single hybrid search across all documents. The manifest lists no individual tools, so the exact operations are not documented in the supplied material.
When to use it: Worth adding when you want an assistant to find material in your own document collection without sending queries to an online search service, and when keyword-only search misses results that a semantic match would catch.
Requirements: Runs as a local process on the user's machine over stdio, distributed as an mcpb package; desktop only, with no web executable. No authentication, environment variables or headers are declared.

Before you install

The server indexes and searches your local documents, so consider which folders it can reach and whether sensitive files are included. No credentials, payments or write actions are shown in the supplied material.

Installation

In SourceWeft

Open LocalSynapse - Local File Search MCP Server in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Tools

SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

v2.1.0LatestSep 16, 2026

Score

25% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 days25 pts
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Auth declared10 pts
Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.
Tools listed15 pts
Answer tools/list without a credential, or ship a package that starts in a sandbox without one.
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
License10 pts
Declare a license in the repository or the registry entry.