🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 129 (from laksa172)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa129.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 = 63 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://pmc.ncbi.nlm.nih.gov/articles/PMC4227945/\')), getAhrefsUnparsedNoserviceFromURL(\'https://pmc.ncbi.nlm.nih.gov/articles/PMC4227945/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC4227945\/","crawl_time":1774250580,"first_indexed_time":0,"http_code":200,"src_unparsed":"gov,nih!nlm,ncbi,pmc,\/articles\/PMC4227945\/ s443","src_root_hash":"7295144728021232729","history_drop_reason":null,"meta_title":"A Marginalized Zero-Inflated Poisson Regression Model with Overall Exposure Effects - PMC","meta_descriptions":["The zero-inflated Poisson (ZIP) regression model is often employed in public health research to examine the relationships between exposures of interest and a count outcome exhibiting many zeros, in excess of the amount expected under sampling from a ..."],"meta_canonical":null,"ml_categories_json":"{\"\/Health\":741,\"\/Health\/Public_Health\":663,\"\/Health\/Public_Health\/Health_Policy\":654,\"\/Science\":653,\"\/Science\/Biological_Sciences\":483,\"\/Science\/Biological_Sciences\/Other\":412}","ml_types_json":"{\"\/Article\":963,\"\/Article\/Study_or_Research_Findings\":897}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":0,"attrs_is_republished":0,"attrs_nr_words":"10055","attrs_boilerpipe_nr_words":"9546","body_ext_links_number":32,"body_int_links_number":52,"meta_nofollow":1,"meta_noarchive":1,"props_was_rendered":0,"src_redirect":"","download_time_msec":136,"download_ttfb_msec":121,"download_size":51823}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 129 · Partition 63

laksa129

7295144728021232729

📄

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`	2.4 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://pmc.ncbi.nlm.nih.gov/articles/PMC4227945/

Last Crawled

2026-03-23 07:23:00 (2 months ago)

First Indexed

not set

HTTP Status Code

200

Content

Meta Title

A Marginalized Zero-Inflated Poisson Regression Model with Overall Exposure Effects - PMC

Meta Description

The zero-inflated Poisson (ZIP) regression model is often employed in public health research to examine the relationships between exposures of interest and a count outcome exhibiting many zeros, in excess of the amount expected under sampling from a ...

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		74.1%
/Health/Public_Health		66.3%
/Health/Public_Health/Health_Policy		65.4%
/Science		65.3%
/Science/Biological_Sciences		48.3%
/Science/Biological_Sciences/Other		41.2%

Raw JSON

{
    "/Health": 741,
    "/Health/Public_Health": 663,
    "/Health/Public_Health/Health_Policy": 654,
    "/Science": 653,
    "/Science/Biological_Sciences": 483,
    "/Science/Biological_Sciences/Other": 412
}

ML Page Types

/Article		96.3%
/Article/Study_or_Research_Findings		89.7%

Raw JSON

{
    "/Article": 963,
    "/Article/Study_or_Research_Findings": 897
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

null

Publish Time

not set

Original Publish Time

not set

Republished

Word Count (Total)

10,055

Word Count (Content)

9,546

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Yes

Meta Noarchive

Yes

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

136

TTFB (ms)

121

Download Size (bytes)

51,823

Location

Host ID

129 (laksa129)

Partition ID

Root Hash

7295144728021232729

Unparsed URL

gov,nih!nlm,ncbi,pmc,/articles/PMC4227945/ s443