Web Page Change Detector — Watch a Section by ID or Class

Web Watchdog - Website Change Monitor & Diff API for AI Agents

santhej/web-watchdog

Check if any URL changed since a given content hash, or watch it on a schedule. Diffs web pages, JSON APIs, RSS feeds and sitemaps and returns what changed, old vs new values, numeric deltas and a one-line summary. Billed per change detected, not per check. Strongest on APIs, docs and changelogs.

Page Watch — Website Change Monitor & Content Tracker

mfapitools/page-watch

Monitor any URL for content changes with hash-based change detection. Pay per check + per detected change. Ideal for watching competitor pages, docs, pricing, or any public web page.

Watch any web page and get told exactly what changed since the last run: the added lines, the removed lines and how much of the page moved. Narrow it to one region with a CSS selector, and ignore the clocks and counters that change on every load.

Url to Hash

onescales/url-to-hash

Convert any webpage or file into a cryptographic hash (MD5, SHA-256, SHA-512). Hash HTML pages, images, PDFs, documents, and any file accessible via URL for content monitoring, integrity verification, and duplicate detection

Website Change Monitor — Page Diff & Change Alerts

sian.agency/website-change-monitor

Monitor any web page for content changes between runs. Each check hashes the page (or a CSS-selected part of it), compares it with the previous snapshot, and returns a line-level diff on change. Optional JavaScript rendering and webhook alerts.

Fetch a public webpage and return clean LLM-ready text, titles, headings, links, source metadata, and a deterministic SHA-256 content hash. Public pages only. No browser rendering or login.

Hash Generator - MD5, SHA-256, SHA-512 & HMAC

eliai/hash-generator

Generate MD5, SHA-1, SHA-256, SHA-512 and HMAC hashes of text or a fetched file, in hex and base64 - all algorithms in one call. Bulk. $0.0005 per input; failures are free.

Fingerprint public web pages with SHA-256, compare previous hashes, and capture redirects, response timing, metadata, security headers, and lightweight page-structure signals.

Website Change Monitor — Diff & Alert (Bulk)

hipersoft/website-change-monitor

Watch web pages for changes on a schedule. Extract text from a CSS region, hash and diff against the previous snapshot, and get a change percentage per URL. Trigger n8n/Make/Zapier workflows when a page changes.

SEO Audit & Change Monitor

ozzie_bagadirov/seo-audit-change-monitor

SEO audit for a whole website: broken links, redirects, duplicate titles and descriptions, sitemap and indexing problems. Get a health score and a fix for every issue, and see what changed since the last run. Up to 5,000 pages per run.