# Website technology checker: run it free, or from your agent

The technologies a website runs, such as CMS, CDN, analytics and frameworks, with category and description.

## Prompt

Use looot to profile the tech stack of these companies: [paste the domains]. 1. Set up https://looot.ai/skill.md. 2. Search the catalog for a website technology endpoint and check its price before you call. 3. Run it once per domain. 4. Return a table with each domain, its CMS, analytics, hosting and ecommerce tools, and one line on what the stack says about the company.

## What it needs

A domain

## What comes back

- technology name
- category
- one line description
- the technology's website

## Endpoints and providers

- tomba: tomba-technology

## What it costs

The tool on the web page runs live at no cost to you and is limited per hour. The results come from public data through looot. For heavier or repeated use, run the same job from your own looot account: looot bills per call and charges nothing while your agent is idle. The live price comes from the catalog and shows on the web page.

## Scout a prospect

See whether a company runs a given CMS, shop or analytics tool before you reach out.

## Compare competitors

Check which frameworks, CDN and analytics a rival site uses.

## Enrich a lead list

Have your agent add the stack of every domain in a list.

## Agent research

Give an agent a domain and let it read the stack before it writes a pitch.

## How do I check what technology a website uses?

Type the domain in the box at the top of this page and press the button. You get a table of the technologies detected, with their category, a short description and a link.

## Is this website technology checker free?

Yes. It costs you nothing and needs no account, and it is limited per hour. For a list of domains, your agent runs the same lookup on your own looot account.

## Can it tell which CMS a website uses?

When the CMS leaves traces in the public site, yes: it shows up with the category CMS. A headless or custom CMS can leave no trace, and then it is missing from the table.

## Why is a tool I know the site uses missing?

Detection reads what the public site exposes. Tools behind a login, on the server only or loaded after a click often leave no trace. Treat the table as what is visible, not the full stack.

## Where does the data come from?

From Tomba's technology lookup, through the looot catalog. The provider and the live price show on this page.

## Why does a domain return nothing?

The site may block automated visits or have no detectable technology. Try the main domain without a path or a subdomain.

## Can my agent check many domains?

Yes. Copy the prompt above with your list. The agent runs one lookup per domain and returns a single table.

## How do I run this from my agent?

Copy the prompt above into Claude, Cursor or any agent with the looot skill. It finds the technology endpoint, shows the price and builds the table for you.

## Related tools

- /free-tools/company-lookup-by-domain
- /free-tools/website-speed-test
- /free-tools/ip-lookup

## Last reviewed

2026-10-14. The price per call is read live from the catalog on the web page.

## Agent skill for this page

https://looot.ai/free-tools/website-technology-checker/skill.md sets an agent up for exactly the jobs on this page, with the live price of each, and offers the page's starter task once the user has picked a job and seen the price. The line to give an agent is under "Give this to your agent" below.

## For agents

### Give this to your agent

```text
set up looot for Website technology checker - https://looot.ai/free-tools/website-technology-checker/skill.md
```