Fourchan Mcp

io.github.mrfentmenPublished by GitHub account mrfentmenv1.0.0Updated Nov 5, 2026

Use this MCP server to 4chan, board catalogs, threads, and posts from the raw internet culture...

VerifiedSTDIODesktop onlyWeb Search & ScrapingCommunication & Collaboration

Overview

AI-generated overview

Local MCP server that lets an assistant browse 4chan boards, board catalogs and thread posts through the public read-only JSON API.

What you can do
  • List all 4chan boards, split into SFW and NSFW
  • Fetch a board's live catalog of threads, sorted by reply count
  • Read the posts inside a specific thread, with post HTML flattened to readable text and image filenames included
When to use it
Useful when you want an assistant to look up 4chan board structure, current threads or the contents of a discussion without opening a browser. Suited to research on internet culture and imageboard content rather than to posting or moderation.
Requirements
Runs as a local process over stdio, installed from the npm package fourchan-mcp and started with a build step and node. Needs network access to the public 4chan JSON API; no account, API key or environment variable is declared.
Before you install
Content is unfiltered user-generated material and includes NSFW boards, so results may be offensive or unsuitable. The server is read-only per its README, but fetched content comes from a third party and should be treated as untrusted.

Installation

In SourceWeft

  1. Open Fourchan Mcp in the dashboard and add it to a workspace.
  2. 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.

Other MCP clients

Follow the launch instructions in the repository.

README

fourchan mcp

MCP server for 4chan, board catalogs, threads, and posts from the raw archive of internet culture.

Tools

ToolWhat it does
list_boardsAll boards, split into SFW / NSFW
get_catalogLive threads for a board, sorted by reply count
get_threadRead a thread's posts

Usage

bash
npm run build && node dist/index.js

Example:

get_catalog { board: "g", limit: 10 }get_thread { board: "g", threadNo: 109460960 }

Keyless (the official read only JSON API at a.4cdn.org). Post HTML is flattened to readable text; image filenames are included.

Source: README.md at commit ca20b1d

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v1.0.0LatestSep 22, 2026

Score

40% 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

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • 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
  • License10 pts

    Declare a license in the repository or the registry entry.