🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 79 (from laksa053)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa079.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 = 31 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://towardsdatascience.com/a-b-testing-a-complete-guide-to-statistical-testing-e3f1db140499/\')), getAhrefsUnparsedNoserviceFromURL(\'https://towardsdatascience.com/a-b-testing-a-complete-guide-to-statistical-testing-e3f1db140499/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/towardsdatascience.com\/a-b-testing-a-complete-guide-to-statistical-testing-e3f1db140499\/","crawl_time":1777823771,"first_indexed_time":1739255995,"http_code":200,"src_unparsed":"com,towardsdatascience!\/a-b-testing-a-complete-guide-to-statistical-testing-e3f1db140499\/ s443","src_root_hash":"12035788063718406279","history_drop_reason":null,"meta_title":"A\/B Testing - A complete guide to statistical testing | Towards Data Science","meta_descriptions":[],"meta_canonical":null,"ml_categories_json":"{\"\/Internet_and_Telecom\":334,\"\/Internet_and_Telecom\/Web_Services\":325,\"\/Computers_and_Electronics\":244,\"\/Internet_and_Telecom\/Web_Services\/Web_Stats_and_Analytics\":244,\"\/Science\":240,\"\/Computers_and_Electronics\/Software\":238,\"\/Science\/Computer_Science\":141,\"\/Science\/Computer_Science\/Machine_Learning_and_Artificial_Intelligence\":109,\"\/Computers_and_Electronics\/Software\/Software_Utilities\":103}","ml_types_json":"{\"\/Article\":999,\"\/Article\/Tutorial_or_Guide\":994}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en-us","attrs_author":"Francesco Casalegno","attrs_publish_time":1613552042,"attrs_original_publish_time":1613552042,"attrs_is_republished":0,"attrs_nr_words":"2381","attrs_boilerpipe_nr_words":"1994","body_ext_links_number":36,"body_int_links_number":35,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":155,"download_ttfb_msec":136,"download_size":39114}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 79 · Partition 31

laksa079

12035788063718406279

📄

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 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://towardsdatascience.com/a-b-testing-a-complete-guide-to-statistical-testing-e3f1db140499/

Last Crawled

2026-05-03 15:56:11 (1 month ago)

First Indexed

2025-02-11 06:39:55 (1 year ago)

HTTP Status Code

200

Content

Meta Title

A/B Testing - A complete guide to statistical testing | Towards Data Science

Meta Description

null

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

/Internet_and_Telecom		33.4%
/Internet_and_Telecom/Web_Services		32.5%
/Computers_and_Electronics		24.4%
/Internet_and_Telecom/Web_Services/Web_Stats_and_Analytics		24.4%
/Science		24.0%
/Computers_and_Electronics/Software		23.8%
/Science/Computer_Science		14.1%
/Science/Computer_Science/Machine_Learning_and_Artificial_Intelligence		10.9%
/Computers_and_Electronics/Software/Software_Utilities		10.3%

Raw JSON

{
    "/Internet_and_Telecom": 334,
    "/Internet_and_Telecom/Web_Services": 325,
    "/Computers_and_Electronics": 244,
    "/Internet_and_Telecom/Web_Services/Web_Stats_and_Analytics": 244,
    "/Science": 240,
    "/Computers_and_Electronics/Software": 238,
    "/Science/Computer_Science": 141,
    "/Science/Computer_Science/Machine_Learning_and_Artificial_Intelligence": 109,
    "/Computers_and_Electronics/Software/Software_Utilities": 103
}

ML Page Types

/Article		99.9%
/Article/Tutorial_or_Guide		99.4%

Raw JSON

{
    "/Article": 999,
    "/Article/Tutorial_or_Guide": 994
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

en-us

Author

Francesco Casalegno

Publish Time

2021-02-17 08:54:02 (5 years ago)

Original Publish Time

2021-02-17 08:54:02 (5 years ago)

Republished

Word Count (Total)

2,381

Word Count (Content)

1,994

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

155

TTFB (ms)

136

Download Size (bytes)

39,114

Location

Host ID

79 (laksa079)

Partition ID

Root Hash

12035788063718406279

Unparsed URL

com,towardsdatascience!/a-b-testing-a-complete-guide-to-statistical-testing-e3f1db140499/ s443