🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 180 (from laksa144)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa180.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 = 54 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://news.mit.edu/2014/interactive-error-correcting-code-1002\')), getAhrefsUnparsedNoserviceFromURL(\'https://news.mit.edu/2014/interactive-error-correcting-code-1002\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/news.mit.edu\/2014\/interactive-error-correcting-code-1002","crawl_time":1775266544,"first_indexed_time":1598305522,"http_code":200,"src_unparsed":"edu,mit!news,\/2014\/interactive-error-correcting-code-1002 s443","src_root_hash":"10722954425220430980","history_drop_reason":null,"meta_title":"New frontier in error-correcting codes | MIT News | Massachusetts Institute of Technology","meta_descriptions":["Coding scheme for interactive communication is the first to near optimality on three classical measures."],"meta_canonical":null,"ml_categories_json":"{\"\/Computers_and_Electronics\":644,\"\/Science\":495,\"\/Science\/Computer_Science\":488,\"\/Science\/Computer_Science\/Machine_Learning_and_Artificial_Intelligence\":410,\"\/Computers_and_Electronics\/Software\":343,\"\/Computers_and_Electronics\/Software\/Software_Utilities\":181,\"\/Internet_and_Telecom\":144}","ml_types_json":"{\"\/Article\":998,\"\/Article\/News_Update\":634}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":null,"attrs_publish_time":1412222403,"attrs_original_publish_time":1412222403,"attrs_is_republished":0,"attrs_nr_words":"1629","attrs_boilerpipe_nr_words":"817","body_ext_links_number":13,"body_int_links_number":138,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":81,"download_ttfb_msec":80,"download_size":31049}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 180 · Partition 54

laksa180

10722954425220430980

📄

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 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://news.mit.edu/2014/interactive-error-correcting-code-1002

Last Crawled

2026-04-04 01:35:44 (2 months ago)

First Indexed

2020-08-24 21:45:22 (5 years ago)

HTTP Status Code

200

Content

Meta Title

New frontier in error-correcting codes | MIT News | Massachusetts Institute of Technology

Meta Description

Coding scheme for interactive communication is the first to near optimality on three classical measures.

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		64.4%
/Science		49.5%
/Science/Computer_Science		48.8%
/Science/Computer_Science/Machine_Learning_and_Artificial_Intelligence		41.0%
/Computers_and_Electronics/Software		34.3%
/Computers_and_Electronics/Software/Software_Utilities		18.1%
/Internet_and_Telecom		14.4%

Raw JSON

{
    "/Computers_and_Electronics": 644,
    "/Science": 495,
    "/Science/Computer_Science": 488,
    "/Science/Computer_Science/Machine_Learning_and_Artificial_Intelligence": 410,
    "/Computers_and_Electronics/Software": 343,
    "/Computers_and_Electronics/Software/Software_Utilities": 181,
    "/Internet_and_Telecom": 144
}

ML Page Types

/Article		99.8%
/Article/News_Update		63.4%

Raw JSON

{
    "/Article": 998,
    "/Article/News_Update": 634
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

null

Publish Time

2014-10-02 04:00:03 (11 years ago)

Original Publish Time

2014-10-02 04:00:03 (11 years ago)

Republished

Word Count (Total)

1,629

Word Count (Content)

817

Links

External Links

Internal Links

138

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

TTFB (ms)

Download Size (bytes)

31,049

Location

Host ID

180 (laksa180)

Partition ID

Root Hash

10722954425220430980

Unparsed URL

edu,mit!news,/2014/interactive-error-correcting-code-1002 s443