🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 31 (from laksa053)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa031.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 = 35 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://cs336.stanford.edu/\')), getAhrefsUnparsedNoserviceFromURL(\'https://cs336.stanford.edu/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/cs336.stanford.edu\/","crawl_time":1775047655,"first_indexed_time":1725377784,"http_code":200,"src_unparsed":"edu,stanford!cs336,\/ s443","src_root_hash":"9619766982384267031","history_drop_reason":null,"meta_title":"Stanford CS336 | Language Modeling from Scratch","meta_descriptions":["Official course website for Stanford CS336: Language Modeling from Scratch (Spring 2026), including logistics, schedule, assignments, and course materials."],"meta_canonical":null,"ml_categories_json":"{\"\/Jobs_and_Education\":896,\"\/Jobs_and_Education\/Education\":896,\"\/Computers_and_Electronics\":722,\"\/Jobs_and_Education\/Education\/Computer_Education\":587,\"\/Computers_and_Electronics\/Programming\":547,\"\/Computers_and_Electronics\/Programming\/Development_Tools\":290}","ml_types_json":"{\"\/Core_Page\":889,\"\/Core_Page\/Services_Page\":846}","ml_intent_types_json":"{\"Informational\":843,\"Navigational\":363}","meta_language":"en","attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":1725377784,"attrs_is_republished":0,"attrs_nr_words":"1305","attrs_boilerpipe_nr_words":"1175","body_ext_links_number":20,"body_int_links_number":9,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":37,"download_ttfb_msec":37,"download_size":8363}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 31 · Partition 35

laksa031

9619766982384267031

📄

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://cs336.stanford.edu/

Last Crawled

2026-04-01 12:47:35 (2 months ago)

First Indexed

2024-09-03 15:36:24 (1 year ago)

HTTP Status Code

200

Content

Meta Title

Stanford CS336 | Language Modeling from Scratch

Meta Description

Official course website for Stanford CS336: Language Modeling from Scratch (Spring 2026), including logistics, schedule, assignments, and course materials.

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

/Jobs_and_Education		89.6%
/Jobs_and_Education/Education		89.6%
/Computers_and_Electronics		72.2%
/Jobs_and_Education/Education/Computer_Education		58.7%
/Computers_and_Electronics/Programming		54.7%
/Computers_and_Electronics/Programming/Development_Tools		29.0%

Raw JSON

{
    "/Jobs_and_Education": 896,
    "/Jobs_and_Education/Education": 896,
    "/Computers_and_Electronics": 722,
    "/Jobs_and_Education/Education/Computer_Education": 587,
    "/Computers_and_Electronics/Programming": 547,
    "/Computers_and_Electronics/Programming/Development_Tools": 290
}

ML Page Types

/Core_Page		88.9%
/Core_Page/Services_Page		84.6%

Raw JSON

{
    "/Core_Page": 889,
    "/Core_Page/Services_Page": 846
}

ML Intent Types

Informational		84.3%
Navigational		36.3%

Raw JSON

{
    "Informational": 843,
    "Navigational": 363
}

Content Metadata

Language

Author

null

Publish Time

not set

Original Publish Time

2024-09-03 15:36:24 (1 year ago)

Republished

Word Count (Total)

1,305

Word Count (Content)

1,175

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)

8,363

Location

Host ID

31 (laksa031)

Partition ID

Root Hash

9619766982384267031

Unparsed URL

edu,stanford!cs336,/ s443