YaCy Search MCP

An MCP server that allows AI agents to interact with a self-hosted YaCy peer-to-peer search engine. It enables web searching, site crawling, index status monitoring, peer listing, and ranking evaluation without requiring a central API or API key, leveraging the agent's own local YaCy instance.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by pad01g

Vendor documentation

What you can do with it

Search the web using a local YaCy peer
Crawl specific sites to update the local index
Evaluate search ranking settings and results
List connected peers and trust status

Source and maintenance

Community listingRegistry 1.0.0

mcp-registry: io.github.pad01g/yacy-search@1.0.0 Source repository Project website

Maintenance checked: Nov 1, 2026, 3:11 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

ghcr.io/pad01g/yacy-search-mcp:1.0.0

oci

ghcr.io/pad01g/yacy-search-mcp:1.0.0 package definition

{
  "transport": "stdio",
  "identifier": "ghcr.io/pad01g/yacy-search-mcp:1.0.0",
  "registryType": "oci",
  "environmentVariables": [
    {
      "name": "YACY_URL",
      "isRequired": true,
      "description": "Base URL of your YaCy peer as seen from the MCP server container, e.g. http://yacy:8090 on a shared Docker network (docker run --network ...), or http://host.docker.internal:8090"
    },
    {
      "name": "YACY_ADMIN_USER",
      "default": "admin",
      "description": "YaCy administrator account, needed for crawling and settings"
    },
    {
      "name": "YACY_ADMIN_PASSWORD",
      "description": "YaCy administrator password; without it crawl, settings and the index counts of index_status are not available"
    },
    {
      "name": "YACY_CRAWL_ALLOW_PRIVATE",
      "description": "1 lets crawl reach loopback and private addresses (intranets); off by default"
    },
    {
      "name": "YACY_ALLOW_TRUST_SETTINGS",
      "description": "1 lets set_ranking_setting change the trust filter settings (acceptUnverified, excludeTags); off by default"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "yacy-search-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "YACY_URL=<YOUR_YACY_URL>",
        "-e",
        "YACY_ADMIN_USER=<YOUR_YACY_ADMIN_USER>",
        "-e",
        "YACY_ADMIN_PASSWORD=<YOUR_YACY_ADMIN_PASSWORD>",
        "-e",
        "YACY_CRAWL_ALLOW_PRIVATE=<YOUR_YACY_CRAWL_ALLOW_PRIVATE>",
        "-e",
        "YACY_ALLOW_TRUST_SETTINGS=<YOUR_YACY_ALLOW_TRUST_SETTINGS>",
        "ghcr.io/pad01g/yacy-search-mcp:1.0.0"
      ],
      "env": {
        "YACY_URL": "<YOUR_YACY_URL>",
        "YACY_ADMIN_USER": "<YOUR_YACY_ADMIN_USER>",
        "YACY_ADMIN_PASSWORD": "<YOUR_YACY_ADMIN_PASSWORD>",
        "YACY_CRAWL_ALLOW_PRIVATE": "<YOUR_YACY_CRAWL_ALLOW_PRIVATE>",
        "YACY_ALLOW_TRUST_SETTINGS": "<YOUR_YACY_ALLOW_TRUST_SETTINGS>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "yacy-search-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "YACY_URL=<YOUR_YACY_URL>",
        "-e",
        "YACY_ADMIN_USER=<YOUR_YACY_ADMIN_USER>",
        "-e",
        "YACY_ADMIN_PASSWORD=<YOUR_YACY_ADMIN_PASSWORD>",
        "-e",
        "YACY_CRAWL_ALLOW_PRIVATE=<YOUR_YACY_CRAWL_ALLOW_PRIVATE>",
        "-e",
        "YACY_ALLOW_TRUST_SETTINGS=<YOUR_YACY_ALLOW_TRUST_SETTINGS>",
        "ghcr.io/pad01g/yacy-search-mcp:1.0.0"
      ],
      "env": {
        "YACY_URL": "<YOUR_YACY_URL>",
        "YACY_ADMIN_USER": "<YOUR_YACY_ADMIN_USER>",
        "YACY_ADMIN_PASSWORD": "<YOUR_YACY_ADMIN_PASSWORD>",
        "YACY_CRAWL_ALLOW_PRIVATE": "<YOUR_YACY_CRAWL_ALLOW_PRIVATE>",
        "YACY_ALLOW_TRUST_SETTINGS": "<YOUR_YACY_ALLOW_TRUST_SETTINGS>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "yacy-search-mcp": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "YACY_URL=<YOUR_YACY_URL>",
        "-e",
        "YACY_ADMIN_USER=<YOUR_YACY_ADMIN_USER>",
        "-e",
        "YACY_ADMIN_PASSWORD=<YOUR_YACY_ADMIN_PASSWORD>",
        "-e",
        "YACY_CRAWL_ALLOW_PRIVATE=<YOUR_YACY_CRAWL_ALLOW_PRIVATE>",
        "-e",
        "YACY_ALLOW_TRUST_SETTINGS=<YOUR_YACY_ALLOW_TRUST_SETTINGS>",
        "ghcr.io/pad01g/yacy-search-mcp:1.0.0"
      ],
      "env": {
        "YACY_URL": "<YOUR_YACY_URL>",
        "YACY_ADMIN_USER": "<YOUR_YACY_ADMIN_USER>",
        "YACY_ADMIN_PASSWORD": "<YOUR_YACY_ADMIN_PASSWORD>",
        "YACY_CRAWL_ALLOW_PRIVATE": "<YOUR_YACY_CRAWL_ALLOW_PRIVATE>",
        "YACY_ALLOW_TRUST_SETTINGS": "<YOUR_YACY_ALLOW_TRUST_SETTINGS>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "yacy-search-mcp": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "YACY_URL=<YOUR_YACY_URL>",
        "-e",
        "YACY_ADMIN_USER=<YOUR_YACY_ADMIN_USER>",
        "-e",
        "YACY_ADMIN_PASSWORD=<YOUR_YACY_ADMIN_PASSWORD>",
        "-e",
        "YACY_CRAWL_ALLOW_PRIVATE=<YOUR_YACY_CRAWL_ALLOW_PRIVATE>",
        "-e",
        "YACY_ALLOW_TRUST_SETTINGS=<YOUR_YACY_ALLOW_TRUST_SETTINGS>",
        "ghcr.io/pad01g/yacy-search-mcp:1.0.0"
      ],
      "env": {
        "YACY_URL": "<YOUR_YACY_URL>",
        "YACY_ADMIN_USER": "<YOUR_YACY_ADMIN_USER>",
        "YACY_ADMIN_PASSWORD": "<YOUR_YACY_ADMIN_PASSWORD>",
        "YACY_CRAWL_ALLOW_PRIVATE": "<YOUR_YACY_CRAWL_ALLOW_PRIVATE>",
        "YACY_ALLOW_TRUST_SETTINGS": "<YOUR_YACY_ALLOW_TRUST_SETTINGS>"
      }
    }
  }
}

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