🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 102 (from laksa010)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa102.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 = 13 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://pll.harvard.edu/course/cs50s-introduction-artificial-intelligence-python\')), getAhrefsUnparsedNoserviceFromURL(\'https://pll.harvard.edu/course/cs50s-introduction-artificial-intelligence-python\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/pll.harvard.edu\/course\/cs50s-introduction-artificial-intelligence-python","crawl_time":1775045568,"first_indexed_time":1638932390,"http_code":200,"src_unparsed":"edu,harvard!pll,\/course\/cs50s-introduction-artificial-intelligence-python s443","src_root_hash":"2971912334127662702","history_drop_reason":null,"meta_title":"CS50's Introduction to Artificial Intelligence with Python | Harvard University","meta_descriptions":["Learn to use machine learning in Python in this introductory course on artificial intelligence."],"meta_canonical":null,"ml_categories_json":"{\"\/Computers_and_Electronics\":890,\"\/Computers_and_Electronics\/Programming\":806,\"\/Computers_and_Electronics\/Programming\/Scripting_Languages\":702,\"\/Jobs_and_Education\":563,\"\/Jobs_and_Education\/Education\":563,\"\/Jobs_and_Education\/Education\/Computer_Education\":509}","ml_types_json":"{\"\/Core_Page\":773,\"\/Core_Page\/Services_Page\":755}","ml_intent_types_json":"{\"Informational\":896,\"Navigational\":196}","meta_language":"en","attrs_author":null,"attrs_publish_time":1581705017,"attrs_original_publish_time":1581705017,"attrs_is_republished":0,"attrs_nr_words":"584","attrs_boilerpipe_nr_words":"296","body_ext_links_number":3,"body_int_links_number":39,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":34,"download_ttfb_msec":33,"download_size":15917}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 102 · Partition 13

laksa102

2971912334127662702

📄

INDEXABLE

✅

CRAWLED

2 months 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`	2.1 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://pll.harvard.edu/course/cs50s-introduction-artificial-intelligence-python

Last Crawled

2026-04-01 12:12:48 (2 months ago)

First Indexed

2021-12-08 02:59:50 (4 years ago)

HTTP Status Code

200

Content

Meta Title

CS50's Introduction to Artificial Intelligence with Python | Harvard University

Meta Description

Learn to use machine learning in Python in this introductory course on artificial intelligence.

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		89.0%
/Computers_and_Electronics/Programming		80.6%
/Computers_and_Electronics/Programming/Scripting_Languages		70.2%
/Jobs_and_Education		56.3%
/Jobs_and_Education/Education		56.3%
/Jobs_and_Education/Education/Computer_Education		50.9%

Raw JSON

{
    "/Computers_and_Electronics": 890,
    "/Computers_and_Electronics/Programming": 806,
    "/Computers_and_Electronics/Programming/Scripting_Languages": 702,
    "/Jobs_and_Education": 563,
    "/Jobs_and_Education/Education": 563,
    "/Jobs_and_Education/Education/Computer_Education": 509
}

ML Page Types

/Core_Page		77.3%
/Core_Page/Services_Page		75.5%

Raw JSON

{
    "/Core_Page": 773,
    "/Core_Page/Services_Page": 755
}

ML Intent Types

Informational		89.6%
Navigational		19.6%

Raw JSON

{
    "Informational": 896,
    "Navigational": 196
}

Content Metadata

Language

Author

null

Publish Time

2020-02-14 18:30:17 (6 years ago)

Original Publish Time

2020-02-14 18:30:17 (6 years ago)

Republished

Word Count (Total)

584

Word Count (Content)

296

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)

15,917

Location

Host ID

102 (laksa102)

Partition ID

Root Hash

2971912334127662702

Unparsed URL

edu,harvard!pll,/course/cs50s-introduction-artificial-intelligence-python s443