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CodeChef

codechef.com

Scanned Fresh938 checks

100of 100
How it adds up →
In its own wordsLooks like: Company or service siteCodeChef - Learn and Practice Coding with ProblemsLearn coding with our free and beginner friendly courses on Python, Java, C, C++, Data structures, Algorithms, SQL. Solve our collection of 1000s of problems to practice coding.
PopularityTop 10KBuilt withDrupal, jQuery15 technologies foundTrust signals5 of 7 foundDomain registered 21 years agoBuilt with AI? None foundNo traces found

CodeChef (codechef.com) looks like a company or service site, is ranked in the top 10,000 sites and was registered in 2005. It is built with Drupal and jQuery; we found no traces of an AI site builder.

Popularity

Website Traffic Checker

Among the top 10K sites.

A popularity band, not a visit count.

Tranco: #16,893 · Chrome UX Report: Top 10,000 · Majestic Million: #24,235

Each list, with its date
SourceSaysAs of
TrancoA research ranking that combines several traffic and link sources, published daily.#16,893list of 27 Oct 2026
Chrome UX ReportRank buckets from Google’s real Chrome traffic, published monthly.Top 10,000Sep 2026
Majestic MillionRanks sites by how many separate networks link to them (links, not visits), published daily. CC BY 3.0#24,235list of 28 Oct 2026
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Technology

Tech Stack Checker

Built with Drupal and jQuery.

  • DrupalCMSShow evidenceHide evidence
    Evidence · response header
    x-drupal-cache: MISS
    Popular sites using Drupal Is this wrong? Report it
  • jQueryJavaScript libraryShow evidenceHide evidence
    Evidence · page source, line 21
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js">
    Popular sites using jQuery Is this wrong? Report it
Everything else it uses (13)

Around it: CDN, Performance, DNS, Email and more.

Business tools can stay listed after a site stops using them.

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Trust signals

Website Trust Checker

5 of 7 trust signals found on the home page.

Signals, not a judgement: missing details are common on small, honest sites.

  • Domain registered8 May 2005, 21 years agoNoted
  • HTTPSLoads over HTTPS with a valid certificateFound
  • Contact detailsEmail and phone on the home pageFound
    Show evidence (2)Hide evidence
    Exhibit 1 · page source, line 896, as Cloudflare’s email protection decodes itMasked for privacy. An email address or phone number can belong to a person, and data protection law, such as the EU’s GDPR, asks us to keep only what we need: that the page lists one, and where.
    <a href="mailto:h•••@codechef.com">h•••@codechef.com</a>
    Exhibit 2 · page source, line 897Masked for privacy. An email address or phone number can belong to a person, and data protection law, such as the EU’s GDPR, asks us to keep only what we need: that the page lists one, and where.
    Bengaluru, Karnataka 560045 h•••@codechef.com +91 ••••• •••80
    Is this wrong? Report it
  • Privacy policyLinked from the home page, and the page opensFound
  • TermsLinked from the home page, and the page opensFound
  • Security filterNot blocked by Cloudflare’s security filter and Quad9’s security filterNoted
Every signal we looked at

On the site

  • Contact pageLinked from the home page, and the page opensFound
  • About pageLinked from the home page, and the page opensFound
  • Privacy policyLinked from the home page, and the page opensFound
  • TermsLinked from the home page, and the page opensFound
  • Refund or returns policyNo link found on the home pageNot found
  • Contact detailsEmail and phone on the home pageFound
    Show evidence (2)Hide evidence
    Exhibit 1 · page source, line 896, as Cloudflare’s email protection decodes itMasked for privacy. An email address or phone number can belong to a person, and data protection law, such as the EU’s GDPR, asks us to keep only what we need: that the page lists one, and where.
    <a href="mailto:h•••@codechef.com">h•••@codechef.com</a>
    Exhibit 2 · page source, line 897Masked for privacy. An email address or phone number can belong to a person, and data protection law, such as the EU’s GDPR, asks us to keep only what we need: that the page lists one, and where.
    Bengaluru, Karnataka 560045 h•••@codechef.com +91 ••••• •••80
    Is this wrong? Report it
  • Company detailsName: CodeChefPartly
  • Payment providersNone on the home pageNoted
  • Trackers1 analytics and advertising tool: LinkedIn Insight TagNoted

Behind the site

  • Security filterNot blocked by Cloudflare’s security filter and Quad9’s security filterNotedCloudflare’s security filter and Quad9’s security filter
  • Domain registered8 May 2005, 21 years agoNoteddomain registry
  • HTTPSLoads over HTTPS with a valid certificateFound
  • Protective settings3 of 6 in placePartly
  • Email protectionProtected against forged emailFoundDNS records

A second opinion on its security setup: Mozilla’s HTTP Observatory grades the site when you open it. Ten checks before you buy · A signal looks wrong? Report it

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What it is

Website Summary

Looks like: Company or service site.

In its own wordsCodeChef - Learn and Practice Coding with ProblemsLearn coding with our free and beginner friendly courses on Python, Java, C, C++, Data structures, Algorithms, SQL. Solve our collection of 1000s of problems to practice coding.

Our reading of the page, medium confidence.

Show evidenceHide evidence
Exhibit 1 · Wikidata
Q25316225: CodeChef, company
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Who is behind it

  • structured dataCodeChef
  • copyright lineCodeChef Inc
  • WikidataCodeChef

Confirmed by 3 independent sources: structured data, copyright line and Wikidata.

Wikidata: Based in Mumbai; founded by Bhavin Turakhia.

Show evidence (3)Hide evidence
Exhibit 1 · page source, line 53
"name": "CodeChef"
Exhibit 2 · page source, line 909
© 2026 CodeChef Inc. All rights reserved.
Exhibit 3 · Wikidata
Q25316225: CodeChef
Is this wrong? Report it

Each name is quoted from its source. A brand and the company that owns it often go by different names.

More about it: Wikidata, profiles, AI use, page facts

In Wikidata

  • CodeChef: global competitive programming platform · company · since 2009

Wikidata, the free knowledge base behind Wikipedia, lists this domain as the official website of this item. Volunteers write it; each item shows its sources.

Its summary for AI assistantsCodeChef is a coding education platform. It began in 2009 as a competitive programming site and is today used primarily by universities: colleges run their practical lab courses on it, students learn through structured curriculum-aligned paths, and institutions and companies use it to conduct proctored assessments, and companies hire developers from its community. The online judge and contests…Read it in full

AI use

  • AI training: doesn’t ask AI training crawlers to stay away.
  • AI assistants: may read it for the people who ask them.

What its robots.txt and robots tags ask of AI crawlers. Each crawler chooses whether to follow it.

Site name
CodeChef
Language
English (en)
What it tells search engines
Organization

Named in its structured data

  • OrganizationCodeChef

Read from what the page says about itself; we haven’t checked whether it’s true.

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Built with AI?

AI Website Detector

No AI builder traces found.

Coding tools such as Cursor leave no traces, so this doesn’t mean a person made it.

AI traces: None found

How we know

AI site builders leave traces in the sites they make. We look for the traces of 53 of them and show every match with the line it came from, so you can check it yourself.

We test this on 2,275 sites whose makers we know, and publish what we get wrong.

How we test it · Every builder we know · How to tell if a site was built with AI

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AI access

AI Crawler Checker

Ready for AI: it scores 86 of 100.

It lets every AI crawler in: the site’s choice, never scored.

86of 100

AI readiness

AI-friendly

It says what it is in structured data and lists its pages.

  1. Findable
  2. Readable
  3. AI-friendly

To reach Agent-ready:Files for AI agents +10

Can AI find it?

30/32

Can AI read it?

56/58
  • Text without scripts
  • Title and description
  • Structured data
  • llms.txt
  • Markdown copy

Can agents use it?

0/10

Optional: for sites with an API or a sign-in.

Higher than 89% of the 2,439 most visited sites we read, whose median is 72.

Checked 30 Oct 2026

What to fix

Optional: 3 fixes few sites have yetup to +14 points

  • Files for AI agents

    Now None of the 8 we look for.

    If agents could use the site, publish what they need where they look.

    Details

    Why it matters: Agents act for people: they look for these files to know what a site lets them do. Worth it only if agents can use the site.

    Prompt for your coding assistant (Claude Code, Cursor, your builder’s chat)
    If AI agents could use https://www.codechef.com for its visitors (to search it, book, buy or sign in), publish what they need at the standard addresses, and only what the site really offers: an MCP server card at /.well-known/mcp/server-card.json if it runs an MCP server, an API catalog at /.well-known/api-catalog (RFC 9727) listing its public APIs, and OAuth protected resource metadata at /.well-known/oauth-protected-resource (RFC 9728) if agents sign in.
    +10optional

  • Markdown copy

    Now Not offered: it sends the page’s HTML.

    Answer requests for Markdown with a Markdown version of the page.

    Details

    Why it matters: A Markdown copy gives AI tools the page’s words without the HTML around them.

    Prompt for your coding assistant (Claude Code, Cursor, your builder’s chat)
    When a request to https://www.codechef.com asks for Markdown (its Accept header includes text/markdown), answer with a Markdown version of the page’s main content and the header Content-Type: text/markdown. Requests for HTML keep getting HTML; add Vary: Accept so caches keep the two apart.
    +2optional
Every check, with its evidence

Can AI find it?

  • robots.txtFound, 131 linesFound
  • SitemapListed in robots.txt, and it lists 4 sitemapsFound
    Show evidenceHide evidence
    Exhibit 1 · robots.txt, line 137
    Sitemap: https://www.codechef.com/sitemap.xml
    Is this wrong? Report it
  • Links for AI toolsNone in the home page’s headersNot found
  • Search listingAllowed: no noindex ruleAllowed

Can AI read it?

  • Text without scripts15,759 characters before scripts runFound
    Show evidenceHide evidence
    Exhibit 1 · page text, before scripts run
    CodeChef - Learn and Practice Coding with Problems Courses Programming and DSA Learn to think like a programmer. Develop your problem-solving skills with essential data structures and algorithms.…
    Is this wrong? Report it
  • Markdown copyNot offered: it sends the page’s HTMLNot found
  • llms.txtFound: “CodeChef”Found
    Show evidenceHide evidence
    Exhibit 1 · llms.txt, line 3
    > CodeChef is a coding education platform. It began in 2009 as a competitive programming site and is today used primarily by universities: colleges run their practical lab courses on it, students learn through structured curriculum-aligned paths, and institutions and companies use it to conduct proctored assessments, and companies hire developers from its community. The online judge and contests…
    Is this wrong? Report it
  • Title and descriptionBothFound
    Show evidence (2)Hide evidence
    Exhibit 1 · page source, line 5
    <title>CodeChef - Learn and Practice Coding with Problems</title>
    Exhibit 2 · page source, line 19
    <meta name="description" content="Learn coding with our free and beginner friendly courses on Python, Java, C, C++, Data structures, Algorithms, SQL. Solve our collection of 1000s of problems to practice coding.">
    Is this wrong? Report it
  • Structured dataFound: OrganizationFound
    Show evidenceHide evidence
    Exhibit 1 · page source, line 53
    <script type="application/ld+json">
    Is this wrong? Report it

Can agents use it?

  • API catalogNone foundNot found
  • Sign-in for AI agentsNone foundNot found
  • Auth.mdNone foundNot found
  • AI catalogNone foundNot found
  • MCP serverNone foundNot found
  • Agent cardNone foundNot found
  • Agent SkillsNone foundNot found
  • Agents in DNSNone foundNot found

What it lets AI do

Not scored

Keeping AI out is the site’s choice, so it never lowers the score.

  • AI trainingOpenAI, Anthropic, Google, Meta and 4 moreLet in
  • AI answers and searchOpenAI, Anthropic, Google, Perplexity and 3 moreLet in
Every AI crawler, and how we checked

AI companies

Its robots.txt names none of the 24 crawlers of the 10 AI companies we know, so it lets every one in.

None of the 27 other AI crawlers we know is kept out.

What it tells AI crawlers

It gives no Content Signals and no “noai” tag.

If this is your site

  • Decide what AI may do with the site, and say it in robots.txt. Write the lines

Like 68% of the 1,691 popular sites whose robots.txt we read in October 2026, it keeps no AI training crawler out. How many websites block AI crawlers?

We read the site once, as our named bot: its robots.txt, read as crawlers read it, its home page and the files AI tools ask sites for. What we couldn’t read says so. robots.txt asks and doesn’t enforce: a firewall can treat AI crawlers differently from us.

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Score breakdown

Site Score

100 of 100: strong trust signals.

How established and checkable it is; AI traces carry no weight.

100of 100
TransparencyContact, policies and about page30 / 30
Track recordHow long the domain has existed25 / 25
PopularityIts place in public rankings20 / 20
Security and setupHTTPS and standard protections15 / 15
ConsistencyName, description and what it tells search engines10 / 10
Why each part scored what it did
TransparencyContact, policies and about page30 / 30contact page linked · email and phone given · privacy policy linked · terms linked · no payments seen, so no refund policy needed · about page linked
Track recordHow long the domain has existed25 / 25domain registered 21 years ago
PopularityIts place in public rankings20 / 20Top 10K in a popularity list
Security and setupHTTPS and standard protections15 / 15loads over HTTPS · sends visitors to HTTPS · always uses HTTPS · protective settings
ConsistencyName, description and what it tells search engines10 / 10site name matches the domain · describes itself · tells search engines what it is

A high score isn’t a promise that a business is honest. How the score works.

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Domain history

Domain History

Registered in 2005.

  1. Domain registeredRDAP
  2. First certificate issuedCertificate Transparency
  3. This scanCheckAnySite

The web archive couldn’t be reached; we’ll ask it again. Why can this be empty?

Changes, earlier scans and alerts
Since our previous scan
This is our first scan of the site.
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How we scanned it

Only from what anyone can see: the site’s public pages and public records.

  • Politely. Our scanner, CheckAnySiteBot, says who it is and follows the site’s robots.txt.
  • With sources. Every fact above says where it came from and when.
  • Without guessing. When we couldn’t check something, we say so.
This scan, in numbers

938 checks on 30 Oct 2026, with version 0.6.0 of our checks and version 1.1 of the score.

How we work · What each version changed · About our scanner

Quick look

Built with AI?

None foundWe found no AI builder traces.

“None found” never means “made by a person”: coding assistants leave no traces.

All the evidence →

Related

Quick look

How popular is it?

Top 10KBy the best of 3 public lists.

  • Tranco#16,893list of 27 Oct 2026
  • Chrome UX ReportTop 10,000Sep 2026
  • Majestic Million#24,235list of 28 Oct 2026

A popularity band, never a visit count.

The popularity section →

Related

Quick look

What is it built with?

CMS
Drupal
JavaScript library
jQuery

And 13 more around it (CDN, Performance, DNS, Email), in the section.

Each with its evidence →

Related

Quick look

Which trust signals does it show?

On the site

  • Contact pageFound
  • About pageFound
  • Privacy policyFound
  • TermsFound
  • Refund or returns policyNot found
  • Contact detailsFound
  • Company detailsPartly
  • Payment providersNoted
  • TrackersNoted

Behind the site

  • Security filterNoted
  • Domain registeredNoted
  • HTTPSFound
  • Security headersPartly
  • Software versionsNoted
  • NetworkNoted
  • Email setupFound
  • First certificateNoted
  • DNSSECNot found
  • Certificate authoritiesNot found
  • Security contactNot found

Signals, not a judgement: missing details are common on small, honest sites.

Every signal with its source →

Related

How has it changed? →
Quick look

How does it add up?

100of 100

Strong trust signals. An open formula (v1.1): every point comes from a finding above. AI traces carry no weight.

TransparencyContact, policies and about page30 / 30
Track recordHow long the domain has existed25 / 25
PopularityIts place in public rankings20 / 20
Security and setupHTTPS and standard protections15 / 15
ConsistencyName, description and what it tells search engines10 / 10
Why each part scored what it did →

Related

Questions about codechef.com

What is codechef.com?

CodeChef describes itself: “Learn coding with our free and beginner friendly courses on Python, Java, C, C++, Data structures, Algorithms, SQL. Solve our collection of 1000s of problems to practice coding.” It looks like a company or service site. See the evidence

How old is codechef.com?

Its domain was registered on 8 May 2005, 21 years ago. See the evidence

What is codechef.com built with?

It is built with Drupal and jQuery; we found 15 technologies in all. See the evidence

How popular is codechef.com?

It is among the top 10,000 sites, by Tranco, Chrome UX Report and Majestic Million. See the evidence

Was codechef.com made with AI?

We found no traces of an AI site builder. That doesn’t prove a person built it: AI coding assistants leave no traces. See the evidence

Who is behind codechef.com?

CodeChef, named by its structured data, its copyright line and Wikidata. See the evidence

More sites like this: company or service site

Automated findings from the site’s public home page and public records, as of 30 Oct 2026. They describe what we found, not the people or business behind the site, and they may be incomplete or out of date. This is information, not advice. Terms · Report an error

What this scan can’t tell you
  • Whether the business is real, honest or delivers what it sells.
  • Whether a site was made with AI when no traces were left: coding assistants and hand edits leave none.
  • How many people visit: we show popularity bands from public lists, not visits.
  • Anything beyond the home page as it was at the time of the scan.

Is this your site? Ask for a correction.

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The result describes what we found on 30 Oct 2026, with evidence.

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One scan answers everything: AI traces, popularity, technology, trust signals, how the site describes itself, a score and its history. A quick check only decides which answer comes first. We read public pages as CheckAnySiteBot and follow robots.txt.