🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 152 (from laksa058)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa152.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 = 74 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://en.wikipedia.org/wiki/Error_detection_and_correction\')), getAhrefsUnparsedNoserviceFromURL(\'https://en.wikipedia.org/wiki/Error_detection_and_correction\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/en.wikipedia.org\/wiki\/Error_detection_and_correction","crawl_time":1779643049,"first_indexed_time":1379787301,"http_code":200,"src_unparsed":"org,wikipedia!en,\/wiki\/Error_detection_and_correction s443","src_root_hash":"17790707453426894952","history_drop_reason":null,"meta_title":"Error detection and correction","meta_descriptions":[],"meta_canonical":null,"ml_categories_json":"{\"\/Computers_and_Electronics\":530,\"\/Computers_and_Electronics\/Networking\":338,\"\/Internet_and_Telecom\":244,\"\/Internet_and_Telecom\/Communications_Equipment\":187,\"\/Science\":167,\"\/Computers_and_Electronics\/Networking\/Data_Formats_and_Protocols\":162,\"\/Internet_and_Telecom\/Communications_Equipment\/Other\":136,\"\/Science\/Computer_Science\":118}","ml_types_json":"{\"\/Article\":999,\"\/Article\/Wiki\":814}","ml_intent_types_json":"{\"Informational\":999}","meta_language":null,"attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":1379787301,"attrs_is_republished":0,"attrs_nr_words":"4501","attrs_boilerpipe_nr_words":"4447","body_ext_links_number":45,"body_int_links_number":195,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":0,"download_ttfb_msec":0,"download_size":132643}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 152 · Partition 74

laksa152

17790707453426894952

📄

INDEXABLE

✅

CRAWLED

9 days 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`	0.3 months ago (distributed domain, exempt)
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://en.wikipedia.org/wiki/Error_detection_and_correction

Last Crawled

2026-05-24 17:17:29 (9 days ago)

First Indexed

2013-09-21 18:15:01 (12 years ago)

HTTP Status Code

200

Content

Meta Title

Error detection and correction

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

/Computers_and_Electronics		53.0%
/Computers_and_Electronics/Networking		33.8%
/Internet_and_Telecom		24.4%
/Internet_and_Telecom/Communications_Equipment		18.7%
/Science		16.7%
/Computers_and_Electronics/Networking/Data_Formats_and_Protocols		16.2%
/Internet_and_Telecom/Communications_Equipment/Other		13.6%
/Science/Computer_Science		11.8%

Raw JSON

{
    "/Computers_and_Electronics": 530,
    "/Computers_and_Electronics/Networking": 338,
    "/Internet_and_Telecom": 244,
    "/Internet_and_Telecom/Communications_Equipment": 187,
    "/Science": 167,
    "/Computers_and_Electronics/Networking/Data_Formats_and_Protocols": 162,
    "/Internet_and_Telecom/Communications_Equipment/Other": 136,
    "/Science/Computer_Science": 118
}

ML Page Types

/Article		99.9%
/Article/Wiki		81.4%

Raw JSON

{
    "/Article": 999,
    "/Article/Wiki": 814
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

null

Author

null

Publish Time

not set

Original Publish Time

2013-09-21 18:15:01 (12 years ago)

Republished

Word Count (Total)

4,501

Word Count (Content)

4,447

Links

External Links

Internal Links

195

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

TTFB (ms)

Download Size (bytes)

132,643

Location

Host ID

152 (laksa152)

Partition ID

Root Hash

17790707453426894952

Unparsed URL

org,wikipedia!en,/wiki/Error_detection_and_correction s443