🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 124 (from laksa199)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa124.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 = 21 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.mcgill.ca/oss/article/covid-19/navigating-false-negatives-covid-rapid-tests\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.mcgill.ca/oss/article/covid-19/navigating-false-negatives-covid-rapid-tests\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.mcgill.ca\/oss\/article\/covid-19\/navigating-false-negatives-covid-rapid-tests","crawl_time":1776655323,"first_indexed_time":1649185619,"http_code":200,"src_unparsed":"ca,mcgill!www,\/oss\/article\/covid-19\/navigating-false-negatives-covid-rapid-tests s443","src_root_hash":"18239483145122604324","history_drop_reason":null,"meta_title":"Navigating False Negatives on COVID Rapid Tests - McGill University","meta_descriptions":["If you think you have COVID and test negative, you need to test again."],"meta_canonical":null,"ml_categories_json":"{\"\/Health\":818,\"\/Health\/Public_Health\":620,\"\/Health\/Public_Health\/Health_Policy\":597,\"\/Science\":393,\"\/Science\/Biological_Sciences\":348,\"\/Science\/Biological_Sciences\/Other\":219}","ml_types_json":"{\"\/Article\":999,\"\/Article\/Tutorial_or_Guide\":542}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":null,"attrs_publish_time":1650632486,"attrs_original_publish_time":1649185619,"attrs_is_republished":0,"attrs_nr_words":"890","attrs_boilerpipe_nr_words":"649","body_ext_links_number":17,"body_int_links_number":34,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":36,"download_ttfb_msec":36,"download_size":15490}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 124 · Partition 21

laksa124

18239483145122604324

📄

INDEXABLE

✅

CRAWLED

1 month 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`	1.5 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.mcgill.ca/oss/article/covid-19/navigating-false-negatives-covid-rapid-tests

Last Crawled

2026-04-20 03:22:03 (1 month ago)

First Indexed

2022-04-05 19:06:59 (4 years ago)

HTTP Status Code

200

Content

Meta Title

Navigating False Negatives on COVID Rapid Tests - McGill University

Meta Description

If you think you have COVID and test negative, you need to test again.

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

/Health		81.8%
/Health/Public_Health		62.0%
/Health/Public_Health/Health_Policy		59.7%
/Science		39.3%
/Science/Biological_Sciences		34.8%
/Science/Biological_Sciences/Other		21.9%

Raw JSON

{
    "/Health": 818,
    "/Health/Public_Health": 620,
    "/Health/Public_Health/Health_Policy": 597,
    "/Science": 393,
    "/Science/Biological_Sciences": 348,
    "/Science/Biological_Sciences/Other": 219
}

ML Page Types

/Article		99.9%
/Article/Tutorial_or_Guide		54.2%

Raw JSON

{
    "/Article": 999,
    "/Article/Tutorial_or_Guide": 542
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

null

Publish Time

2022-04-22 13:01:26 (4 years ago)

Original Publish Time

2022-04-05 19:06:59 (4 years ago)

Republished

Word Count (Total)

890

Word Count (Content)

649

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

TTFB (ms)

Download Size (bytes)

15,490

Location

Host ID

124 (laksa124)

Partition ID

Root Hash

18239483145122604324

Unparsed URL

ca,mcgill!www,/oss/article/covid-19/navigating-false-negatives-covid-rapid-tests s443