Marketplace Price & Stock Tracker
A persistent watcher for ecommerce operators, resellers, and category buyers. Monitors marketplaces, niche forums, and product pages for price movements, inventory swings, and emerging buying signals in a product category you care about. Maintains a SQLite state table to dedupe observations, scores each change by significance, and only sends an alert when something is new or materially different since the last run — so the digest you get is the short list of moves worth acting on, not a noisy feed.
Agent snapshot
Built for ecommerce work, not a generic template.
2
template uses
4
catalog views
2
integrations used
2
labels matched
Sample input
Build an agent to marketplace Price & Stock Tracker. Use Google Sheets and Slack. Focus on watch things. Return a ready-to-review result after each run.
Sample output
Every Monday morning, scans your tracked marketplaces and niche forums for price drops, restocks, and new listings, dedupes against past observations, and emails you a ranked summary of what actually moved.
Workflow brief
Where Marketplace Price & Stock Tracker fits in a ecommerce automation system
Marketplace Price & Stock Tracker is designed for a specific recurring job: a persistent watcher for ecommerce operators, resellers, and category buyers. Monitors marketplaces, niche forums, and product pages for price movements, inventory swings, and emerging buying signals in a product category you care about. Maintains a SQLite state table to dedupe observations, scores each change by significance, and only sends an alert when something is new or materially different since the last run — so the digest you get is the short list of moves worth acting on, not a noisy feed. The agent page keeps the workflow concrete by showing the connected apps, the input a team can give Twin, and the output the run is expected to produce.
A team can start from this public template, adjust the instructions, connect the relevant accounts, and schedule the agent once the review path is clear. That makes it useful for repeatable work where the same research, update, summary, or follow-up needs to happen again.
In this setup Twin uses Google Sheets and Slack as source systems, action targets, or reporting destinations. The agent can combine those tools with browser automation and API calls when the workflow crosses systems.
What this agent automates
This run includes 8 concrete steps from the published agent data.
Read agent state: last run timestamp, prior inventory snapshots, processed post IDs, and the run log
Skip the run if today already has a completed entry in the run log for the chosen cadence
For each monitored source, scrape product pages via the platform-specific scraper, falling back to generic scrape plus LLM extraction
Update the SQLite inventory_snapshots and price_history tables; insert new posts into processed_posts
Score changes against the focus list and the price-drop threshold; suppress alerts when price or stock is null
Append every observation as a new row to the spreadsheet log destination for long-term review
Integrations used
Marketplace Price & Stock Tracker connects Google Sheets and Slack.
Google Sheets
Connected in this agent
Slack
Connected in this agent
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Plans start at €20/mo