Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 81 (from laksa032)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa081.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, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.edx.org/school/harvardx\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.edx.org/school/harvardx\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.edx.org\/school\/harvardx","crawl_time":1775754613,"first_indexed_time":1386098338,"http_code":200,"src_unparsed":"org,edx!www,\/school\/harvardx s443","src_root_hash":"3090160618261780481","history_drop_reason":null,"meta_title":"Online Courses from Harvard University","meta_descriptions":["<p>Harvard University is devoted to excellence in teaching, learning, and research, and to developing leaders in many disciplines who make a difference globally. Harvard faculty are engaged with teaching and research to push the boundaries of human knowledge. The University has twelve degree-granting Schools in addition to the Radcliffe Institute for Advanced Study.<\/p><p>Established in 1636, Harvard is the oldest institution of higher education in the United States. The University, which is based in Cambridge and Boston, Massachusetts, has an enrollment of over 20,000 degree candidates, including undergraduate, graduate, and professional students. Harvard has more than 360,000 alumni around the world.<\/p>"],"attrs_boilerpipe_text":null,"attrs_markdown":null,"attrs_readable_markdown":null,"meta_canonical":null}

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0 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

Property	Value
URL	https://www.edx.org/school/harvardx
Last Crawled	2026-04-09 17:10:13 (8 hours ago)
First Indexed	2013-12-03 19:18:58 (12 years ago)
HTTP Status Code	200
Meta Title	Online Courses from Harvard University
Meta Description	<p>Harvard University is devoted to excellence in teaching, learning, and research, and to developing leaders in many disciplines who make a difference globally. Harvard faculty are engaged with teaching and research to push the boundaries of human knowledge. The University has twelve degree-granting Schools in addition to the Radcliffe Institute for Advanced Study.</p><p>Established in 1636, Harvard is the oldest institution of higher education in the United States. The University, which is based in Cambridge and Boston, Massachusetts, has an enrollment of over 20,000 degree candidates, including undergraduate, graduate, and professional students. Harvard has more than 360,000 alumni around the world.</p>
Meta Canonical	null
Boilerpipe Text	null
Markdown	null
Readable Markdown	null
Shard	81 (laksa)
Root Hash	3090160618261780481
Unparsed URL	org,edx!www,/school/harvardx s443

🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

1. Shard Calculation

Query:

Response:

2. Crawled Status Check

Query:

Response:

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

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