Data tools for tech stacks, sitemaps, tenders and feeds
5 Apify actors by Adam Hale that turn public data into clean spreadsheets and alerts, each with an in-depth guide: a do-it-yourself method, worked examples with real numbers and honest limits. All of them are free to run right now.
Apify actors
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Bulk Tech Stack Lookup (Wappalyzer Alternative)
Bulk tech stack lookup for any list of domains, a Wappalyzer and BuiltWith alternative: CMS, ecommerce platform, frameworks, analytics, CDN and hosting, plus email provider, SPF/DMARC grade, TLS certificate expiry, security headers grade, AI crawler policy and llms.txt. No browser, fast and cheap.
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RSS Feed Reader & Monitor (RSS, Atom, JSON Feed)
Read many RSS, Atom and JSON feeds in one run, or paste website URLs and the feed is found for you. Clean items with title, link, date, summary, author, image and podcast audio. Only-new mode with conditional requests for cheap hourly feed alerts. Keyword and date filters.
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TED Tenders API – EU Public Procurement Search
TED tenders API for EU public procurement: search tenders and contract awards from TED (Tenders Electronic Daily) by keyword, CPV code, country, value and deadline. Clean rows with English titles, buyer, deadline, EUR values, lots and winners. Only-new mode for daily tender alerts.
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UK Tenders API: Find a Tender + Contracts Finder
UK public tenders and contract awards from Find a Tender and Contracts Finder in one feed. Filter by keyword, CPV, region, value, open deadline and SME suitability. Deadlines, values, lots, award criteria and suppliers (companies only). Only-new mode for daily tender alerts.
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XML Sitemap Extractor to CSV & New-URL Monitor
Extract every URL from any site's XML sitemaps to CSV, Excel or JSON (robots.txt discovery, nested indexes, .gz, txt, RSS, broken XML) with lastmod, images, news and hreflang. Changes mode returns only new, removed and updated URLs since the last run: schedule it to monitor competitors.
The list is read from Apify's public API every time this site is built, so new actors appear here automatically. Everything is also on the Apify profile.
Free online tools
Check one item right here, no account needed:
Website tech stack checker
Free website technology checker: enter a domain to see its CMS, CDN, analytics, web server, email provider, SPF, DMARC and security headers. No sign-up.
Sitemap URL extractor
Free sitemap URL extractor: enter a domain or sitemap.xml URL, follow sitemap indexes and gzip files, list up to 2,000 URLs with lastmod and download them as CSV.
RSS to JSON converter
Free RSS to JSON converter: paste an RSS, Atom, RDF or JSON Feed URL (or a page linking to one) and get clean JSON items with title, link, date, author and summary.
TED tender search
Search TED (Tenders Electronic Daily) by keyword and country through the official TED API: newest 25 EU tender notices with buyer, deadline and estimated value.
Free sites
OptLint
Free A2P 10DLC and toll-free SMS registration checker: preflight linter, campaign builder, policy generator and 28 rejection-code guides. Runs in your browser.
SendAs Relay
Keep sending from your Yahoo, iCloud or own-domain address in Gmail after January 2027, with setup guides.
Report Comment Bank
Free sample report card comments by skill and grade band for Ontario, Australia, ATL skills, UK KS1-KS2 and US K-5, with writing tips and a comment picker.
Companies House IDV Roster
Free UK identity verification deadline planner for directors and PSCs: paste a CSV of companies and people to get each verification window, status, .ics reminders and an evidence pack. Runs in your browser.
Black Friday Price Evidence Checker
Free check of Black Friday 'was' prices against the EU 30-day lowest price rule: import price history and sale CSVs, get the prior price per SKU and a signed evidence file.
How these tools work
- They run on Apify. An actor is a cloud program on the Apify platform. You paste your input in a form (or call the API), it runs in the cloud, and you download CSV, Excel or JSON, or connect the results to Slack, email, Google Sheets or a webhook.
- Free now, pay per result later. Today the actors charge no fee of their own; Apify only bills the compute a run uses against your platform credit, and the free plan includes $5 a month. Pay-per-event pricing (for example $3 per 1,000 successful domain lookups) is planned and will be shown on each guide and on Apify before it applies.
- Official sources, polite fetching. The tender actors use the official TED, Find a Tender and Contracts Finder APIs. The web actors identify themselves honestly, follow robots.txt and do not use proxies or try to get past bot protection.
- Organisations, not people. Contact persons, emails and phone numbers are left out or scrubbed.