🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 97 (from laksa042)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa097.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 = 60 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.coursera.org/articles/nft-marketplace\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.coursera.org/articles/nft-marketplace\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.coursera.org\/articles\/nft-marketplace","crawl_time":1777349300,"first_indexed_time":1679328374,"http_code":200,"src_unparsed":"org,coursera!www,\/articles\/nft-marketplace s443","src_root_hash":"1995246928644532097","history_drop_reason":null,"meta_title":"What Is an NFT Marketplace? | Coursera","meta_descriptions":["Learn about NFT marketplace types, which marketplaces to visit based on your interests, and how NFT marketplaces work."],"meta_canonical":null,"ml_categories_json":"{\"\/Internet_and_Telecom\":658,\"\/Internet_and_Telecom\/Web_Services\":603,\"\/Internet_and_Telecom\/Web_Services\/Other\":414,\"\/Arts_and_Entertainment\":240,\"\/Computers_and_Electronics\":204,\"\/Arts_and_Entertainment\/Visual_Art_and_Design\":203,\"\/Finance\":202,\"\/Finance\/Investing\":188,\"\/Computers_and_Electronics\/Software\":104}","ml_types_json":"{\"\/Article\":989,\"\/Article\/Definitions\":456}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":null,"attrs_publish_time":1741651200,"attrs_original_publish_time":1679328374,"attrs_is_republished":1,"attrs_nr_words":"2628","attrs_boilerpipe_nr_words":"2349","body_ext_links_number":32,"body_int_links_number":90,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":296,"download_ttfb_msec":266,"download_size":95303}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 97 · Partition 60

laksa097

1995246928644532097

📄

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`	1.2 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://www.coursera.org/articles/nft-marketplace

Last Crawled

2026-04-28 04:08:20 (1 month ago)

First Indexed

2023-03-20 16:06:14 (3 years ago)

HTTP Status Code

200

Content

Meta Title

What Is an NFT Marketplace? | Coursera

Meta Description

Learn about NFT marketplace types, which marketplaces to visit based on your interests, and how NFT marketplaces work.

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

/Internet_and_Telecom		65.8%
/Internet_and_Telecom/Web_Services		60.3%
/Internet_and_Telecom/Web_Services/Other		41.4%
/Arts_and_Entertainment		24.0%
/Computers_and_Electronics		20.4%
/Arts_and_Entertainment/Visual_Art_and_Design		20.3%
/Finance		20.2%
/Finance/Investing		18.8%
/Computers_and_Electronics/Software		10.4%

Raw JSON

{
    "/Internet_and_Telecom": 658,
    "/Internet_and_Telecom/Web_Services": 603,
    "/Internet_and_Telecom/Web_Services/Other": 414,
    "/Arts_and_Entertainment": 240,
    "/Computers_and_Electronics": 204,
    "/Arts_and_Entertainment/Visual_Art_and_Design": 203,
    "/Finance": 202,
    "/Finance/Investing": 188,
    "/Computers_and_Electronics/Software": 104
}

ML Page Types

/Article		98.9%
/Article/Definitions		45.6%

Raw JSON

{
    "/Article": 989,
    "/Article/Definitions": 456
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

null

Publish Time

2025-03-11 00:00:00 (1 year ago)

Original Publish Time

2023-03-20 16:06:14 (3 years ago)

Republished

Yes

Word Count (Total)

2,628

Word Count (Content)

2,349

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

296

TTFB (ms)

266

Download Size (bytes)

95,303

Location

Host ID

97 (laksa097)

Partition ID

Root Hash

1995246928644532097

Unparsed URL

org,coursera!www,/articles/nft-marketplace s443