🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 97 (from laksa190)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa097.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 = 60 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.coursera.org/learn/stanford-statistics\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.coursera.org/learn/stanford-statistics\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.coursera.org\/learn\/stanford-statistics","crawl_time":1777313102,"first_indexed_time":1606797200,"http_code":200,"src_unparsed":"org,coursera!www,\/learn\/stanford-statistics s443","src_root_hash":"1995246928644532097","history_drop_reason":null,"meta_title":"Introduction to Statistics | Coursera","meta_descriptions":["Offered by Stanford University. Stanford's \"Introduction to Statistics\" teaches you statistical thinking concepts that are essential for ... Enroll for free."],"meta_canonical":null,"ml_categories_json":"{\"\/Jobs_and_Education\":788,\"\/Jobs_and_Education\/Education\":787,\"\/Jobs_and_Education\/Education\/Distance_Learning\":512,\"\/Science\":299,\"\/Science\/Mathematics\":275,\"\/Science\/Mathematics\/Statistics\":269}","ml_types_json":"{\"\/Core_Page\":644,\"\/Core_Page\/Services_Page\":637}","ml_intent_types_json":"{\"Informational\":917,\"Commercial\":203}","meta_language":"en","attrs_author":"Guenther Walther","attrs_publish_time":0,"attrs_original_publish_time":1606797200,"attrs_is_republished":0,"attrs_nr_words":"2897","attrs_boilerpipe_nr_words":"682","body_ext_links_number":32,"body_int_links_number":105,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":873,"download_ttfb_msec":845,"download_size":139510}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 97 · Partition 60

laksa097

1995246928644532097

📄

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`	1.2 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.coursera.org/learn/stanford-statistics

Last Crawled

2026-04-27 18:05:02 (1 month ago)

First Indexed

2020-12-01 04:33:20 (5 years ago)

HTTP Status Code

200

Content

Meta Title

Introduction to Statistics | Coursera

Meta Description

Offered by Stanford University. Stanford's "Introduction to Statistics" teaches you statistical thinking concepts that are essential for ... Enroll for free.

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		78.8%
/Jobs_and_Education/Education		78.7%
/Jobs_and_Education/Education/Distance_Learning		51.2%
/Science		29.9%
/Science/Mathematics		27.5%
/Science/Mathematics/Statistics		26.9%

Raw JSON

{
    "/Jobs_and_Education": 788,
    "/Jobs_and_Education/Education": 787,
    "/Jobs_and_Education/Education/Distance_Learning": 512,
    "/Science": 299,
    "/Science/Mathematics": 275,
    "/Science/Mathematics/Statistics": 269
}

ML Page Types

/Core_Page		64.4%
/Core_Page/Services_Page		63.7%

Raw JSON

{
    "/Core_Page": 644,
    "/Core_Page/Services_Page": 637
}

ML Intent Types

Informational		91.7%
Commercial		20.3%

Raw JSON

{
    "Informational": 917,
    "Commercial": 203
}

Content Metadata

Language

Author

Guenther Walther

Publish Time

not set

Original Publish Time

2020-12-01 04:33:20 (5 years ago)

Republished

Word Count (Total)

2,897

Word Count (Content)

682

Links

External Links

Internal Links

105

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

873

TTFB (ms)

845

Download Size (bytes)

139,510

Location

Host ID

97 (laksa097)

Partition ID

Root Hash

1995246928644532097

Unparsed URL

org,coursera!www,/learn/stanford-statistics s443