🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 97 (from laksa008)

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/bayesian-statistics\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.coursera.org/learn/bayesian-statistics\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.coursera.org\/learn\/bayesian-statistics","crawl_time":1777234897,"first_indexed_time":1468253574,"http_code":200,"src_unparsed":"org,coursera!www,\/learn\/bayesian-statistics s443","src_root_hash":"1995246928644532097","history_drop_reason":null,"meta_title":"Bayesian Statistics: From Concept to Data Analysis | Coursera","meta_descriptions":["Offered by University of California, Santa Cruz. This course introduces the Bayesian approach to statistics, starting with the concept of ... Enroll for free."],"meta_canonical":null,"ml_categories_json":"{\"\/Jobs_and_Education\":630,\"\/Jobs_and_Education\/Education\":629,\"\/Science\":461,\"\/Science\/Mathematics\":442,\"\/Science\/Mathematics\/Statistics\":441,\"\/Jobs_and_Education\/Education\/Distance_Learning\":303}","ml_types_json":"{\"\/Core_Page\":568,\"\/Core_Page\/Services_Page\":560}","ml_intent_types_json":"{\"Informational\":962,\"Commercial\":110}","meta_language":"en","attrs_author":"Herbert Lee","attrs_publish_time":0,"attrs_original_publish_time":1468253574,"attrs_is_republished":0,"attrs_nr_words":"2823","attrs_boilerpipe_nr_words":"182","body_ext_links_number":32,"body_int_links_number":109,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":2064,"download_ttfb_msec":1644,"download_size":135359}

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`	1.3 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/bayesian-statistics

Last Crawled

2026-04-26 20:21:37 (1 month ago)

First Indexed

2016-07-11 16:12:54 (9 years ago)

HTTP Status Code

200

Content

Meta Title

Bayesian Statistics: From Concept to Data Analysis | Coursera

Meta Description

Offered by University of California, Santa Cruz. This course introduces the Bayesian approach to statistics, starting with the concept of ... 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		63.0%
/Jobs_and_Education/Education		62.9%
/Science		46.1%
/Science/Mathematics		44.2%
/Science/Mathematics/Statistics		44.1%
/Jobs_and_Education/Education/Distance_Learning		30.3%

Raw JSON

{
    "/Jobs_and_Education": 630,
    "/Jobs_and_Education/Education": 629,
    "/Science": 461,
    "/Science/Mathematics": 442,
    "/Science/Mathematics/Statistics": 441,
    "/Jobs_and_Education/Education/Distance_Learning": 303
}

ML Page Types

/Core_Page		56.8%
/Core_Page/Services_Page		56.0%

Raw JSON

{
    "/Core_Page": 568,
    "/Core_Page/Services_Page": 560
}

ML Intent Types

Informational		96.2%
Commercial		11.0%

Raw JSON

{
    "Informational": 962,
    "Commercial": 110
}

Content Metadata

Language

Author

Herbert Lee

Publish Time

not set

Original Publish Time

2016-07-11 16:12:54 (9 years ago)

Republished

Word Count (Total)

2,823

Word Count (Content)

182

Links

External Links

Internal Links

109

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

2,064

TTFB (ms)

1,644

Download Size (bytes)

135,359

Location

Host ID

97 (laksa097)

Partition ID

Root Hash

1995246928644532097

Unparsed URL

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