Collectors · Company data

Technology lookup API in Python

CMS, frameworks, analytics, pixels, payments, chat and hosting of any website — one fetch per domain. One POST from Python with domains, rows back as JSON with 23 fields, $0.005 per delivered site. No proxies or parsers to maintain.

Get an API key See the collector

A Python requests snippet that posts { — A Python requests call to the tech_stack collector returns one dict per site, at $0.005 each.

First call

Install, call, read the rows.

pip install requests

The only dependency.

import os, requests

r = requests.post(
    "https://api.quanticdata.io/v1/scraper/collectors/tech_stack/run",
    headers={"Authorization": f"Bearer {os.environ['QD_API_KEY']}"},
    json={
        "domains": ["nytimes.com","allbirds.com"],
    },
    timeout=120,
)
r.raise_for_status()
run = r.json()["payload"]
print(run["count"], "rows,", run["cost"]["usd"], "USD")
for row in run["results"]:
    print(row.get("domain"), row.get("url"), row.get("cms"), row.get("ecommerce_platform"))

Python: one Website tech stack run (Profile two stacks), printing domain, url, cms, ecommerce_platform

The key comes from an environment variable, never from the code. The run answers in the same request when it finishes in time; payload.results holds the rows and payload.cost what they cost.

Request parameters

What the collector takes.

Input of the Website tech stack collector
Parameter	Type	Required	Meaning
`domains`	array	yes	Domains or site URLs, one per line (max 50).
`country`	string	no	ISO 3166-1 alpha-2 code — proxy exit geo and Google locale (gl). Omit for the default pool.
`max_results`	integer	no (default 20)	How many sites to deliver at most (1–50). You pay only for delivered sites.

Response fields

23 fields per site.

Fields of each row (site)
Field	Type	What it holds
`domain`	string	Registrable host (no www).
`url`	string	Final homepage URL fetched.
`cms`	string, nullable	Content management system / site builder.
`ecommerce_platform`	string, nullable	E-commerce platform.
`frameworks`	string[]	JS frameworks and libraries.
`analytics`	string[]	Analytics and product-analytics tools.
`marketing`	string[]	Ad and marketing pixels.
`payments`	string[]	Payment providers loaded on the page.
`chat`	string[]	Chat / support widgets.
`email_marketing`	string[]	Email marketing / CRM scripts.
`security`	string[]	CAPTCHA / anti-bot widgets.
`fonts`	string[]	Font services.
`other`	string[]	Other detected SaaS (CDN media, search, error tracking, consent).
`cdn`	string, nullable	CDN / edge platform from response headers.
`server`	string, nullable	Web server from the Server header.
`generator`	string, nullable	Raw content of the generator meta tag.
`technologies`	object[]	Every detection as { name, category }.
`tech_count`	integer	Total technologies detected.
`wordpress_plugins`	string[]	WordPress plugin slugs seen in the page's asset paths (elementor, woocommerce, contact-form-7…).
`wordpress_theme`	string, nullable	Active WordPress theme slug.
`tracking_ids`	object	{ ga4, gtm, google_ads, meta_pixel }: the measurement and ad account ids printed in the page source — sites sharing an id belong to the same owner.
`powered_by`	string, nullable	X-Powered-By response header ("PHP/8.2.12", "Express", "ASP.NET").
`html_lang`	string, nullable	Language declared on the page (<html lang>).

Add ?format=csv to the runs endpoint to get the same rows as CSV.

Long runs

Run in the background, then poll.

A run that needs more time can go to the background: send "async": true, get 202 with the run id, and poll the runs endpoint until the status is done. Reading a run is free.

import os, time, requests

H = {"Authorization": f"Bearer {os.environ['QD_API_KEY']}"}
r = requests.post("https://api.quanticdata.io/v1/scraper/collectors/tech_stack/run", headers=H,
                  json={**{"domains":["nytimes.com","allbirds.com"]}, "async": True}, timeout=30)
run_id = r.json()["payload"]["run_id"]
while True:
    run = requests.get(f"https://api.quanticdata.io/v1/scraper/collectors/runs/{run_id}", headers=H, timeout=30).json()["payload"]
    if run["status"] in ("done", "failed"):
        break
    time.sleep(5)
print(run["status"], run["count"])

Python: background run and polling

Errors

What can come back, and what is billed.

Collector run errors
Status	Meaning	Billed
`400`	The input does not match the collector (`payload.errors`)	No
`401`	Missing or wrong API key	No
`402`	Balance and free credit do not cover the run: top up	No
`422`	The input can never resolve; retrying the same input cannot help	No
`424`	The run failed at the source (blocked, timed out, layout changed); safe to retry	No
`429`	Rate limit or a per-account brake; wait for `Retry-After`	No

Only delivered rows are billed: a run that delivers nothing costs nothing.

Price

$0.005 per delivered site.

What Website tech stack rows cost at list price
Rows	Cost
1	$0.005
1,000	$5.00
10,000	$50.00

Up to 50 sites per run; split larger jobs into several runs. The $2 free credit every month covers about 400 sites. No subscription; paid tiers lower the unit price. All collector prices: collector pricing.

Before you run it

Questions developers ask

Is there a free Website tech stack API?

Every account gets $2 of free usage each month, about 400 sites of this collector at $0.005 each, with no card.

Do I have to handle proxies, retries or blocks?

No. The collector runs on our network and handles them; a run blocked at the source returns 424 and is not billed.

How many rows can one run return?

Up to 50 sites per run (the max_results input, where the collector has one).

Can an AI agent run it?

Yes: the MCP server exposes it as the run_collector tool, with the same input and price. See the MCP server.

Run it on the free credit.

Create an API key, export it as QD_API_KEY and run the example. $0.005 per delivered site, no subscription.

Get an API key Technology lookup API