🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 65 (from laksa102)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa065.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 = 48 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://opencurve.info/real-eigenvalues-and-eigenvectors-of-3x3-matrices-example-3/\')), getAhrefsUnparsedNoserviceFromURL(\'https://opencurve.info/real-eigenvalues-and-eigenvectors-of-3x3-matrices-example-3/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/opencurve.info\/real-eigenvalues-and-eigenvectors-of-3x3-matrices-example-3\/","crawl_time":1779590899,"first_indexed_time":1615851822,"http_code":200,"src_unparsed":"info,opencurve!\/real-eigenvalues-and-eigenvectors-of-3x3-matrices-example-3\/ s443","src_root_hash":"9199013673007389665","history_drop_reason":null,"meta_title":"Real eigenvalues and eigenvectors of 3x3 matrices, example 3 | OpenCurve","meta_descriptions":[],"meta_canonical":null,"ml_categories_json":"{\"\/Science\":869,\"\/Science\/Mathematics\":865,\"\/Science\/Mathematics\/Other\":796,\"\/Computers_and_Electronics\":106}","ml_types_json":"{\"\/Article\":992,\"\/Article\/Tutorial_or_Guide\":973}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en-gb","attrs_author":null,"attrs_publish_time":1544789622,"attrs_original_publish_time":1544789622,"attrs_is_republished":0,"attrs_nr_words":"1721","attrs_boilerpipe_nr_words":"1411","body_ext_links_number":9,"body_int_links_number":22,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":3398,"download_ttfb_msec":2493,"download_size":93964}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 65 · Partition 48

laksa065

9199013673007389665

📄

INDEXABLE

✅

CRAWLED

10 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
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://opencurve.info/real-eigenvalues-and-eigenvectors-of-3x3-matrices-example-3/

Last Crawled

2026-05-24 02:48:19 (10 days ago)

First Indexed

2021-03-15 23:43:42 (5 years ago)

HTTP Status Code

200

Content

Meta Title

Real eigenvalues and eigenvectors of 3x3 matrices, example 3 | OpenCurve

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

/Science		86.9%
/Science/Mathematics		86.5%
/Science/Mathematics/Other		79.6%
/Computers_and_Electronics		10.6%

Raw JSON

{
    "/Science": 869,
    "/Science/Mathematics": 865,
    "/Science/Mathematics/Other": 796,
    "/Computers_and_Electronics": 106
}

ML Page Types

/Article		99.2%
/Article/Tutorial_or_Guide		97.3%

Raw JSON

{
    "/Article": 992,
    "/Article/Tutorial_or_Guide": 973
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

en-gb

Author

null

Publish Time

2018-12-14 12:13:42 (7 years ago)

Original Publish Time

2018-12-14 12:13:42 (7 years ago)

Republished

Word Count (Total)

1,721

Word Count (Content)

1,411

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

3,398

TTFB (ms)

2,493

Download Size (bytes)

93,964

Location

Host ID

65 (laksa065)

Partition ID

Root Hash

9199013673007389665

Unparsed URL

info,opencurve!/real-eigenvalues-and-eigenvectors-of-3x3-matrices-example-3/ s443