YaCy peer-to-peer search

io.github.pad01g/yacy-search · v1.0.0

Web search, crawling and ranking evaluation on your own YaCy peer: no API key, no central service.

Website Source code Set it up

Connect Runs on your machine

Terminal

claude mcp add yacy-search -e YACY_URL=<YACY_URL> -e YACY_ADMIN_USER=<YACY_ADMIN_USER> -e YACY_ADMIN_PASSWORD=<YACY_ADMIN_PASSWORD> -e YACY_CRAWL_ALLOW_PRIVATE=<YACY_CRAWL_ALLOW_PRIVATE> -e YACY_ALLOW_TRUST_SETTINGS=<YACY_ALLOW_TRUST_SETTINGS> -- docker run -i --rm ghcr.io/pad01g/yacy-search-mcp:1.0.0

claude_desktop_config.json

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

~/.cursor/mcp.json

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

.vscode/mcp.json

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

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

Name	Description
`YACY_URL` Required	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
`YACY_ADMIN_USER` Optional	YaCy administrator account, needed for crawling and settings
`YACY_ADMIN_PASSWORD` Optional, secret	YaCy administrator password; without it crawl, settings and the index counts of index_status are not available
`YACY_CRAWL_ALLOW_PRIVATE` Optional	1 lets crawl reach loopback and private addresses (intranets); off by default
`YACY_ALLOW_TRUST_SETTINGS` Optional	1 lets set_ranking_setting change the trust filter settings (acceptUnverified, excludeTags); off by default

Details

Package	`ghcr.io/pad01g/yacy-search-mcp:1.0.0` (OCI, stdio)
First published	1 Oct 2026
Last updated	1 Oct 2026
Registry name	`io.github.pad01g/yacy-search`

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Live status

Local install

Installed and run on your own machine, so there is no public endpoint to check.

Pair it with live search

Agents that use YaCy peer-to-peer search often also need current facts. NestDaddy MCP gives your AI today's internet: web search, real-time breaking news and full page reading in one connector.

See NestDaddy MCP

For maintainers

[![NestDaddy MCP](https://nestdaddy.com/mcp/servers/io-github-pad01g-yacy-search/badge.svg)](https://nestdaddy.com/mcp/servers/io-github-pad01g-yacy-search)

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