Snagr
Active·★ 21·AGPL-3.0·Updated 2026-10-18
Snagr is a self-hosted price tracker designed for secondhand marketplace hunting. It uses an always-on agent with a headless browser and LLM for scraping to monitor listings, track price history, and notify users of target hits.
#Price Tracking#Self-Hosted#Web Scraping#LLM Agent#Playwright#Marketplace Automation#PostgreSQL#LangChain
01
Features
01Track items across multiple marketplaces with target prices and custom criteria.
02Utilizes a real headless browser (Playwright MCP) and pluggable LLM for accurate marketplace page scraping.
03An always-on agent continuously hunts for new listings, re-checks prices, and manages job queues.
04Customizable notifications for target price hits or new listings via ntfy, Discord, or webhooks.
02
Compatibility
Docker Compose
Deployment
Verified via docs
PostgreSQL
Database
Verified via docs
Python
Runtime
Verified via docs
Playwright
Web Automation
Verified via docs
LangChain
LLM Framework
Verified via docs
React
Frontend
Verified via docs
03
Quick start
1
$ git clone https://github.com/oldmoldycake/Snagr.git
2
$ cd Snagr
3
$ docker compose run --rm backend alembic upgrade head
4
$ docker compose up --build
04
Use cases
↳Automatically find secondhand items at a target price across multiple online marketplaces.
↳Monitor price trends and historical data for collectibles or rare items to make informed purchasing decisions.
↳Receive real-time notifications for new listings or price drops that meet specific criteria.
↳Integrate with other services via webhooks to automate actions based on price tracking events.
05
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