Fewer subscriptions.
More vibe-coding.

Open-source tools & agent skills to build the things you’re paying for.

changedetection.io

Project34.8K

Self-host website, PDF, and JSON change monitoring with configurable checks and alerts.

Added 2026-10-07
Replaces
GitHub

What you can build

  • Build a companion that takes copied price or restock alerts and a purchasing-budget CSV, then outputs a ranked buy list with estimated spend.
  • Build a tracker that takes copied PDF or page-change text plus a rules table, then produces a review checklist with matched terms and manually verified deadlines.
  • Build a triage script that matches copied security-advisory text against a component-and-owner CSV, then outputs affected services and a prioritized review queue.
  • Build a tool that accepts before-and-after JSON snapshots and field rules, checks selected values against thresholds, and outputs a CSV of exceptions instead of raw diffs.
  • Build an incident helper that takes changed HTML text and an allowlist, identifies unexpected links or scripts, and outputs a review report with suspicious fragments.

Try this prompt

Build a small procurement decision companion for changedetection.io alerts. Let a user paste price or restock alert text and import a purchasing-budget CSV. Parse product, price, and availability where present; allow correction of uncertain fields; calculate estimated spend and rank candidates against the budget. Show the source alert beside each result and export a new CSV without overwriting the input. Include sample data and tests for missing prices, duplicate alerts, and budget limits. Do not assume an undocumented changedetection.io API.

Get started

  1. Choose a setup route

    Use the README’s installation section for the Python package instructions, or follow its linked Windows installation guide. The documented Python setup uses a data directory and port.

  2. Plan page fetching

    The README describes a built-in HTTP fetcher and a Chrome-based fetcher for JavaScript pages. Browser Steps require Playwright to be enabled; the Visual Selector requires a connected Playwright content fetcher.

  3. Configure a first watch

    Add a page or supported document/API target, select a check schedule and relevant content filters, then choose a notification channel such as email, Slack, Discord, Telegram, or webhook.

License & notes

Apache-2.0The software is Apache-2.0 licensed; commercial use is permitted, subject to license terms and notices when redistributing. Self-hosting requires your own compute, storage, and network resources. The README also describes a paid hosted subscription. Proxy services may add costs. AI change detection and summaries are identified as hosted/subscription features; self-hosted OSS availability is not established. If using a third-party AI provider, its charges apply; no prices are quoted here.

  • The README identifies AI change detection and summaries as hosted/subscription features; their availability in the self-hosted OSS version is not established.
  • JavaScript-dependent pages and browser interactions require a Playwright-enabled fetcher; the README describes the Visual Selector as requiring a connected Playwright content fetcher.
  • Websites can change layouts, block requests, or require login steps; monitoring results depend on the selected fetcher and watch configuration.
  • When redistributing the software, follow Apache-2.0 terms, including providing the license and retaining applicable notices; mark modified files when changed.

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Added 2026-10-07
Works with
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GitHub

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code-review

Agent skill279K

Reviews code changes against both repository standards and the originating task specification, using parallel focused review passes.

Added 2026-10-07
Works with
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GitHub

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accessibility

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Works with
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azure-pipelines

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Works with
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GitHub

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Format
SKILL.md
GitHub

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Works with
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Works with
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Impeccable

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