Projects - Deep Research Pipeline

Overview

Proposed Architecture

• Local Deep Researcher

• SearXNG

• n8n

Components

Local Deep Researcher

• https://langchain-ai.github.io/langgraph/cloud/reference/cli/

SearXNG

• searxng/searxng: SearXNG is a free internet metasearch engine which aggregates results from various search services and databases. Users are neither tracked nor profiled. - https://github.com/searxng/searxng

• Why use a private instance? — SearXNG Documentation (2025.5.10+e982b9f73) - https://docs.searxng.org/own-instance.html

Logs

Setup

$ cd ~/public_git/
$ git clone https://github.com/langchain-ai/local-deep-researcher.git
$ cd local-deep-researcher/
$ cp .env.example .env

$ uvx --refresh --from "langgraph-cli[inmem]" --with-editable . --python 3.11 langgraph dev

(When debugging in the home network:)
$ uvx --refresh --from "langgraph-cli[inmem]" --with-editable . --python 3.11 langgraph dev --host 0.0.0.0

We have seen

(similar issue: https://community.openai.com/t/error-making-localhost-plugin-http-call-typeerror-failed-to-fetch/225524/2

Setup (SearXNG)

• Docker Container — SearXNG Documentation (2025.5.10+e982b9f73) - https://docs.searxng.org/admin/installation-docker.html#installation-docker

$ mkdir -p ~/tmp/searxng/my-instance
$ cd ~/tmp/searxng/my-instance

(with modifying some)
$ docker run --rm \
             -d -p ${PORT}:8080 \
             -v "${PWD}/searxng:/etc/searxng" \
             -e "BASE_URL=http://localhost:$PORT/" \
             -e "INSTANCE_NAME=my-instance" \
             searxng/searxng

Referring SearXNGをDockerに載せてSearch API経由で検索する - https://zenn.dev/jun_philos/articles/28f137edc98cf3

(edit ls ~/tmp/searxng/my-instance/searxng/settings.yml)
$ fgrep -n3 formats: ~/tmp/searxng/my-instance/searxng/settings.yml
74-    recaptcha_SearxEngineCaptcha: 604800
75-
76-  # remove format to deny access, use lower case.
77:  # formats: [html, csv, json, rss]
78:  formats:
79-    - html
80-    - json
81-

for other configurations, searxng/searxng-docker: The docker-compose files for setting up a SearXNG instance with docker. - https://github.com/searxng/searxng-docker or other resources may help.

Setup(Integrate with n8n)

• LangChain learning resources | n8n Docs - https://docs.n8n.io/advanced-ai/langchain/langchain-learning-resources/

n8n-Based Chain

• Experimenting with a Self-Hosted Deep Research Agent (n8n + SearXNG + Gemini 2.0) - Built with n8n - n8n Community - https://community.n8n.io/t/experimenting-with-a-self-hosted-deep-research-agent-n8n-searxng-gemini-2-0/89573

  • Host Your Own AI Deep Research Agent with n8n, Apify and OpenAI o3 | n8n workflow template - https://n8n.io/workflows/2878-host-your-own-ai-deep-research-agent-with-n8n-apify-and-openai-o3/?_gl=1*1pbwspp*_gcl_au*MjI2MDQ2NTY0LjE3NDYzNjUxNjc.*_ga*MTk5NTc1ODc0LjE3NDY4NzkyMjM.*_ga_0SC4FF2FH9*czE3NDY4NzkyMjMkbzEkZzEkdDE3NDY4ODIwODckajYwJGwwJGgw

References

• langchain-ai/local-deep-researcher: Fully local web research and report writing assistant - https://github.com/langchain-ai/local-deep-researcher

• langchain-ai/open_deep_research - https://github.com/langchain-ai/open_deep_research

• OSS 版 DeepResearch を社内で試す ― local‑deep‑research｜せきとば 〜ChatGPTと暮らす日々〜 - https://note.com/life_chatgpt/n/n3e873a2cc00e

• SearXNG Tool node documentation | n8n Docs - https://docs.n8n.io/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.toolsearxng/#running-a-searxng-instance

• SearXNGをDockerに載せてSearch API経由で検索する - https://zenn.dev/jun_philos/articles/28f137edc98cf3

• Setup your own safe search engine using SearXNG - DEV Community - https://dev.to/armiedema/setup-your-own-safe-search-engine-using-searxng-3428

---

https://github.com/langchain-ai/local-deep-researcher based

https://docs.searxng.org/own-instance.html

https://riq0h.jp/2023/08/20/091355/

• Gemini 2.0 の Search as a tool を試す｜npaka - https://note.com/npaka/n/n2cd8f9199a74

• Xユーザーのうえぞう@うな技研代表さん: 「GeminiのGoogle Searchツールアホほど速いので、これをツール化してLLM問わず利用できるようにした」 / X - https://x.com/uezochan/status/1920421361081839743

https://docs.n8n.io/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.toolsearxng/#running-a-searxng-instance

https://note.com/life_chatgpt/n/n3e873a2cc00e

r

ref