🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 32 (from laksa033)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa032.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, meta_canonical AS meta_canonical, ml_categories_json AS ml_categories_json, ml_types_json AS ml_types_json, ml_intent_types_json AS ml_intent_types_json, meta_language AS meta_language, attrs_author AS attrs_author, ifNull(toUnixTimestamp(attrs_publish_time), 0) AS attrs_publish_time, ifNull(toUnixTimestamp(attrs_original_publish_time), 0) AS attrs_original_publish_time, ifNull(attrs_is_republished, 0) AS attrs_is_republished, ifNull(attrs_nr_words, 0) AS attrs_nr_words, ifNull(attrs_boilerpipe_nr_words, 0) AS attrs_boilerpipe_nr_words, ifNull(body_ext_links_number, 0) AS body_ext_links_number, ifNull(body_int_links_number, 0) AS body_int_links_number, ifNull(meta_nofollow, 0) AS meta_nofollow, ifNull(meta_noarchive, 0) AS meta_noarchive, ifNull(props_was_rendered, 0) AS props_was_rendered, ifNull(src_redirect, \'\') AS src_redirect, ifNull(download_time_msec, 0) AS download_time_msec, ifNull(download_ttfb_msec, 0) AS download_ttfb_msec, ifNull(download_size, 0) AS download_size FROM crawler3.page_info_local FINAL PREWHERE int_partition_id = 39 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.freecodecamp.org/news/free-courses-top-cs-universities/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.freecodecamp.org/news/free-courses-top-cs-universities/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.freecodecamp.org\/news\/free-courses-top-cs-universities\/","crawl_time":1776180485,"first_indexed_time":1587166529,"http_code":200,"src_unparsed":"org,freecodecamp!www,\/news\/free-courses-top-cs-universities\/ s443","src_root_hash":"13723046482134587832","history_drop_reason":null,"meta_title":"1200 Free Computer Science Courses from the World’s Top Universities","meta_descriptions":["In this article, we’ve compiled 1200+ online courses offered by the 60 best universities in the world for studying computer science in 2024. We first built the list in 2020 using a data-driven approach that we have used each year, including 2024. You..."],"meta_canonical":null,"ml_categories_json":"{\"\/Jobs_and_Education\":927,\"\/Jobs_and_Education\/Education\":926,\"\/Jobs_and_Education\/Education\/Computer_Education\":640,\"\/Computers_and_Electronics\":536,\"\/Computers_and_Electronics\/Software\":333,\"\/Computers_and_Electronics\/Software\/Educational_Software\":332}","ml_types_json":"{\"\/Article\":757,\"\/Article\/Roundup\":480}","ml_intent_types_json":"{\"Informational\":977,\"Commercial\":130}","meta_language":"en","attrs_author":null,"attrs_publish_time":1738044000,"attrs_original_publish_time":1587166529,"attrs_is_republished":1,"attrs_nr_words":"15178","attrs_boilerpipe_nr_words":"14964","body_ext_links_number":24,"body_int_links_number":48,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":78,"download_ttfb_msec":65,"download_size":62813}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 32 · Partition 39

laksa032

13723046482134587832

📄

INDEXABLE

✅

CRAWLED

1 month ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	1.7 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property

Value

URL

https://www.freecodecamp.org/news/free-courses-top-cs-universities/

Last Crawled

2026-04-14 15:28:05 (1 month ago)

First Indexed

2020-04-17 23:35:29 (6 years ago)

HTTP Status Code

200

Content

Meta Title

1200 Free Computer Science Courses from the World’s Top Universities

Meta Description

In this article, we’ve compiled 1200+ online courses offered by the 60 best universities in the world for studying computer science in 2024. We first built the list in 2020 using a data-driven approach that we have used each year, including 2024. You...

Meta Canonical

null

Boilerpipe Text

heavy column, fetched on demand

Markdown

heavy column, fetched on demand

Readable Markdown

heavy column, fetched on demand

ML Classification

ML Categories

/Jobs_and_Education		92.7%
/Jobs_and_Education/Education		92.6%
/Jobs_and_Education/Education/Computer_Education		64.0%
/Computers_and_Electronics		53.6%
/Computers_and_Electronics/Software		33.3%
/Computers_and_Electronics/Software/Educational_Software		33.2%

Raw JSON

{
    "/Jobs_and_Education": 927,
    "/Jobs_and_Education/Education": 926,
    "/Jobs_and_Education/Education/Computer_Education": 640,
    "/Computers_and_Electronics": 536,
    "/Computers_and_Electronics/Software": 333,
    "/Computers_and_Electronics/Software/Educational_Software": 332
}

ML Page Types

/Article		75.7%
/Article/Roundup		48.0%

Raw JSON

{
    "/Article": 757,
    "/Article/Roundup": 480
}

ML Intent Types

Informational		97.7%
Commercial		13.0%

Raw JSON

{
    "Informational": 977,
    "Commercial": 130
}

Content Metadata

Language

Author

null

Publish Time

2025-01-28 06:00:00 (1 year ago)

Original Publish Time

2020-04-17 23:35:29 (6 years ago)

Republished

Yes

Word Count (Total)

15,178

Word Count (Content)

14,964

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

TTFB (ms)

Download Size (bytes)

62,813

Location

Host ID

32 (laksa032)

Partition ID

Root Hash

13723046482134587832

Unparsed URL

org,freecodecamp!www,/news/free-courses-top-cs-universities/ s443