Change Detection

Try our Chrome extension

Easily add the current web-page from your browser directly into your changedetection.io tool, more great features coming soon!

Changedetection.io needs your support!

You can help us by supporting changedetection.io on these platforms;

The more popular changedetection.io is, the more time we can dedicate to adding amazing features!

Many thanks :)

changedetection.io team

AI-powered change monitoring

MCP - A way for AI Assistants to interact with changedetection.io

Configure the connection to your favorite AI assistant service, such as OpenAI, Claude, Google Gemini - move from "something changed" to "only the thing you care about changed".

For a short tutorial on how to setup AI integration, see this tutorial.

Intent filtering

Each watch or tag can carry a plain-text intent — "notify me only when the price drops" or "alert when the item goes out of stock". On every detected change the AI evaluates the diff against it and suppresses irrelevant noise.

Tip: intent evaluation benefits from a capable model — recommended qwen2.5:7b locally, or gpt-4o-mini / gemini-2.0-flash. Very small models (≤3B) may misjudge numeric comparisons.

AI Change Summary

Instead of raw diffs, receive plain-language summaries in notifications — "Price dropped from $89 to $67" or "3 new items added to the listing". Set a global default prompt here, or override per watch or tag.

Minimal cost

The AI sees only a unified diff of what changed — never full page HTML. Low-cost models like gpt-4o-mini or Gemini Flash handle this well, typically fractions of a cent per check.

AI Provider

Enable AI / LLM features Master switch — when off, all AI lookups are skipped even if a provider is configured below.

Third-party data transfer — please read

When AI features are active, change data from the websites you monitor — including page diffs and extracted text — is sent to an external AI provider of your choice.

You are solely responsible for ensuring this complies with the terms of service of each website you monitor.
You are solely responsible for compliance with applicable data-protection laws (e.g. GDPR) regarding any personal data that may appear in monitored content.
API costs charged by your chosen provider are your own responsibility; this software has no visibility into or control over those charges.
AI / LLM models are known to hallucinate — producing plausible-sounding but factually incorrect or entirely fabricated output with apparent confidence — and by design may omit or truncate relevant data during summarisation. AI output must never be relied upon as complete or accurate. This software is provided as-is with no warranty of any kind.
By enabling AI features you personally indemnify and hold harmless the creator(s) and contributor(s) of this software from any claims, damages, or liability arising from this data transfer or your use of AI features.

I have read and understood the above. I accept full responsibility and indemnify the creator(s) of this software.

Provider

API Key

API Base URL

Only needed for Ollama or custom/self-hosted endpoints. Leave blank for cloud providers.

Token multiplier for local reasoning models Reasoning models (Qwen3, DeepSeek-R1, Gemma 3, etc.) emit chain-of-thought before the final answer. This multiplier scales every max_tokens cap for this endpoint to leave reasoning room. Defaults to 5x; raise it if responses come back truncated or empty, lower it (down to 1x) if you want tighter limits on a paid endpoint. Applied to Ollama and OpenAI-compatible endpoints — other cloud providers (OpenAI, Anthropic, Gemini) keep their original tight caps.

Switch thinking off Asks the server to answer without thinking first, which is much faster. Unticked, the server decides (llama.cpp: --reasoning-budget). Works with Ollama, and on OpenAI-compatible servers (llama.cpp, vLLM) with models whose chat template supports enable_thinking (Qwen3 and others).

Available models

Model

You can edit the model name directly or load available models above. Click Save to apply your change. Leave the API key blank to keep your saved key.

Your API key is stored locally and sent only to your chosen provider. On each detected change, the watch's diff and extracted text are sent to the LLM — no full page HTML.

Cache ✕ Clear all summary cache
Removes all cached AI change summaries across all watches. They will be regenerated on the next check.

Enable LLM debug logging
Enables litellm verbose output (routed through loguru). Useful when diagnosing provider errors or empty responses. Leave off in production — generates a lot of log volume.

Default AI Change Summary

Default AI Change Summary prompt

Used for all watches unless overridden by the watch or its tag/group. Modify default prompt

Behaviour

Configure a provider first to unlock behaviour settings.

Token & Cost Tracking

No AI usage recorded yet.

Token budget tokens per month (0 = unlimited)

Max input characters characters — currently enforcing: 100,000

Max tokens per watch per period tokens — skips AI evaluation on a watch once its usage within the current period (monthly) hits this cap (0 = unlimited)