🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 19 (from laksa152)

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 = 44 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.harvardmagazine.com/2020/08/features-a-science-is-born\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.harvardmagazine.com/2020/08/features-a-science-is-born\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.harvardmagazine.com\/2020\/08\/features-a-science-is-born","crawl_time":1778343159,"first_indexed_time":1693380042,"http_code":200,"src_unparsed":"com,harvardmagazine!www,\/2020\/08\/features-a-science-is-born s443","src_root_hash":"11111651061333548819","history_drop_reason":null,"meta_title":"Computer science at Harvard in the 1960s and 1970s | Harvard Magazine","meta_descriptions":["The “yeasty” times” when computer research grew at Harvard"],"meta_canonical":null,"ml_categories_json":"{\"\/Computers_and_Electronics\":893,\"\/Computers_and_Electronics\/Software\":521,\"\/Computers_and_Electronics\/Software\/Educational_Software\":385,\"\/Jobs_and_Education\":341,\"\/Jobs_and_Education\/Education\":340,\"\/Jobs_and_Education\/Education\/Computer_Education\":270,\"\/People_and_Society\":107,\"\/Science\":103,\"\/Science\/Computer_Science\":102}","ml_types_json":"{\"\/Article\":999,\"\/Article\/Story\":861}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":"Harry R. Lewis","attrs_publish_time":1596722745,"attrs_original_publish_time":1596240000,"attrs_is_republished":0,"attrs_nr_words":"6700","attrs_boilerpipe_nr_words":"6114","body_ext_links_number":9,"body_int_links_number":71,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":34,"download_ttfb_msec":33,"download_size":35856}

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 44

laksa019

11111651061333548819

📄

INDEXABLE

✅

CRAWLED

24 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`	0.8 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.harvardmagazine.com/2020/08/features-a-science-is-born

Last Crawled

2026-05-09 16:12:39 (24 days ago)

First Indexed

2023-08-30 07:20:42 (2 years ago)

HTTP Status Code

200

Content

Meta Title

Computer science at Harvard in the 1960s and 1970s | Harvard Magazine

Meta Description

The “yeasty” times” when computer research grew at Harvard

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		89.3%
/Computers_and_Electronics/Software		52.1%
/Computers_and_Electronics/Software/Educational_Software		38.5%
/Jobs_and_Education		34.1%
/Jobs_and_Education/Education		34.0%
/Jobs_and_Education/Education/Computer_Education		27.0%
/People_and_Society		10.7%
/Science		10.3%
/Science/Computer_Science		10.2%

Raw JSON

{
    "/Computers_and_Electronics": 893,
    "/Computers_and_Electronics/Software": 521,
    "/Computers_and_Electronics/Software/Educational_Software": 385,
    "/Jobs_and_Education": 341,
    "/Jobs_and_Education/Education": 340,
    "/Jobs_and_Education/Education/Computer_Education": 270,
    "/People_and_Society": 107,
    "/Science": 103,
    "/Science/Computer_Science": 102
}

ML Page Types

/Article		99.9%
/Article/Story		86.1%

Raw JSON

{
    "/Article": 999,
    "/Article/Story": 861
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

Harry R. Lewis

Publish Time

2020-08-06 14:05:45 (5 years ago)

Original Publish Time

2020-08-01 00:00:00 (5 years ago)

Republished

Word Count (Total)

6,700

Word Count (Content)

6,114

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

TTFB (ms)

Download Size (bytes)

35,856

Location

Host ID

19 (laksa019)

Partition ID

Root Hash

11111651061333548819

Unparsed URL

com,harvardmagazine!www,/2020/08/features-a-science-is-born s443