🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 19 (from laksa133)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa019.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 = 8 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.omnicalculator.com/math/eigenvalue-eigenvector\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.omnicalculator.com/math/eigenvalue-eigenvector\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.omnicalculator.com\/math\/eigenvalue-eigenvector","crawl_time":1779012802,"first_indexed_time":1596485589,"http_code":200,"src_unparsed":"com,omnicalculator!www,\/math\/eigenvalue-eigenvector s443","src_root_hash":"12193775503372441619","history_drop_reason":null,"meta_title":"Eigenvalue and Eigenvector Calculator","meta_descriptions":["The eigenvalue and eigenvector calculator finds the eigenvalues and eigenvectors for a 2x2 or 3x3 matrix."],"meta_canonical":null,"ml_categories_json":"{\"\/Science\":756,\"\/Science\/Mathematics\":749,\"\/Computers_and_Electronics\":261,\"\/Computers_and_Electronics\/Software\":224,\"\/Computers_and_Electronics\/Software\/Software_Utilities\":132}","ml_types_json":"{\"\/Article\":721,\"\/Article\/Tutorial_or_Guide\":510}","ml_intent_types_json":"{\"Informational\":987}","meta_language":"en","attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":1596485589,"attrs_is_republished":0,"attrs_nr_words":"2690","attrs_boilerpipe_nr_words":"1927","body_ext_links_number":1,"body_int_links_number":27,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":180,"download_ttfb_msec":123,"download_size":126032}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 19 · Partition 8

laksa019

12193775503372441619

📄

INDEXABLE

✅

CRAWLED

16 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`	0.6 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.omnicalculator.com/math/eigenvalue-eigenvector

Last Crawled

2026-05-17 10:13:22 (16 days ago)

First Indexed

2020-08-03 20:13:09 (5 years ago)

HTTP Status Code

200

Content

Meta Title

Eigenvalue and Eigenvector Calculator

Meta Description

The eigenvalue and eigenvector calculator finds the eigenvalues and eigenvectors for a 2x2 or 3x3 matrix.

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

/Science		75.6%
/Science/Mathematics		74.9%
/Computers_and_Electronics		26.1%
/Computers_and_Electronics/Software		22.4%
/Computers_and_Electronics/Software/Software_Utilities		13.2%

Raw JSON

{
    "/Science": 756,
    "/Science/Mathematics": 749,
    "/Computers_and_Electronics": 261,
    "/Computers_and_Electronics/Software": 224,
    "/Computers_and_Electronics/Software/Software_Utilities": 132
}

ML Page Types

/Article		72.1%
/Article/Tutorial_or_Guide		51.0%

Raw JSON

{
    "/Article": 721,
    "/Article/Tutorial_or_Guide": 510
}

ML Intent Types

Informational

98.7%

Raw JSON

{
    "Informational": 987
}

Content Metadata

Language

Author

null

Publish Time

not set

Original Publish Time

2020-08-03 20:13:09 (5 years ago)

Republished

Word Count (Total)

2,690

Word Count (Content)

1,927

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

180

TTFB (ms)

123

Download Size (bytes)

126,032

Location

Host ID

19 (laksa019)

Partition ID

Root Hash

12193775503372441619

Unparsed URL

com,omnicalculator!www,/math/eigenvalue-eigenvector s443