CrawlCheck

Directory · Web performance and monitoring

Sentry — what a crawler receives from sentry.io

Website measurement, not a product review. This page records what machine clients received from sentry.io. It does not evaluate Sentry software, features, pricing or support.

76
Cgrade

AI assistants like ChatGPT can read your site, but find little to quote about your product.

AI visibility 76/100, measured 2026-11-01 04:37 UTC from outside its network, as each named AI and search crawler and as a browser. An engine can reach and read this site. What is left is giving it something specific to say.

Held at C A medium-severity finding sets the letter.

Open the full report sentry.io ↗

881. ReachCan a named answer-engine crawler get your pages at all?712. ReadOnce it has the bytes, can it find the words?653. QuoteIs there a specific fact it can state and attribute?

4

findings

✓

llms.txt on its host

✗

entity map on its host

10

scans on record since 2026-09-18

The three stages, in the order an engine hits a site

Each stage gates the next: an engine that cannot reach a page never reads it, and one that cannot read it never quotes it.

88

Stage 1 · 40% of the score

Reach

Can a named answer-engine crawler get your pages at all?

Every named crawler was served the same page a browser gets.

71

Stage 2 · 30% of the score

Read

Once it has the bytes, can it find the words?

The content is buried in markup, or the files that guide a crawler are missing.

65

Stage 3 · 30% of the score

Quote

Is there a specific fact it can state and attribute?

An assistant would have to paraphrase your page instead of quoting a fact.

The stage to fix first is quote, the lowest of the three.

What to fix

4 findings on this site, 1 of them scored serious. Every one is named below; the top one is shown in full, free. What we saw, why each matters, how to fix it and the bytes behind it are what a licence buys — or we implement the whole list for you.

1 Medium 3 Note

1Almost nothing a machine receives from this page is readable text3.1% of 628,693 decompressed bytes is visible text, and the largest single block is inline svg at 29,580 bytesMediumDeveloper

What we saw

3.1% of 628,693 decompressed bytes is visible text, and the largest single block is inline svg at 29,580 bytes

Why it matters

A crawler pays for every byte it fetches and can only quote the text. Under 5% readable content means an answer engine downloads the whole page and comes away with almost nothing it can use — the difference between being quotable and being skipped. The content-ratio row above passes at 20%, so without this a page at 2% and a page at 19% were scored identically.

How to fix it

Move inline CSS and JavaScript into external files, drop unused page-builder styling, and make sure the words a visitor reads are in the HTML itself.

Developer: a template, theme or application change — a developer touches it

Fix it with a coding agent

Paste into Claude Code, Cursor or Codex, opened on the code that serves this site.

Show prompt
You are working in the codebase (or server/CDN configuration) that serves sentry.io. A crawler audit found the problem below. Fix it at the source, keep the change as small as possible, and do not change anything a visitor sees unless the fix requires it.

Finding: Almost nothing a machine receives from this page is readable text (PAGE_IS_MOSTLY_CODE, medium severity)
Page: https://sentry.io/
What was measured: 3.1% of 628,693 decompressed bytes is visible text, and the largest single block is inline svg at 29,580 bytes
Why it matters: A crawler pays for every byte it fetches and can only quote the text. Under 5% readable content means an answer engine downloads the whole page and comes away with almost nothing it can use — the difference between being quotable and being skipped. The content-ratio row above passes at 20%, so without this a page at 2% and a page at 19% were scored identically.
How to fix it: Move inline CSS and JavaScript into external files, drop unused page-builder styling, and make sure the words a visitor reads are in the HTML itself.

Rule and examples: https://crawlcheck.io/rules/PAGE_IS_MOSTLY_CODE
Full report (markdown): https://crawlcheck.io/r/rl0minvnoa.md

When you are done:
1. Tell me which files or settings you changed and why.
2. If the fix is a server, CDN or cache setting you cannot change from the code, say exactly where it is set.
3. After deploying, re-scan at https://crawlcheck.io/?url=sentry.io . The fix counts when PAGE_IS_MOSTLY_CODE is gone from the new report.
Why this was decided
RulePAGE_IS_MOSTLY_CODE · rule pack sv34 · scope route
Evaluated2026-11-01 04:37:41 UTC
Decisiond1:c2b9b49ff51706ee4983 · finding f1:ff3e7032d96f52363f75 resolve either at /api/graph/<id> with a key
Observercrawlcheck-worker build d98be86e from LAX · audit v4

What it rests on

IdentityStatusBytessha256Kept
read: /200628,8313449a36ef706write_unconfirmed

26 more in the manifest.

Artifacts: manifest:578bf350054c6314b2e73294029490f817880dcce3aef42b8bc7bbe6b72abd7e

Grade effect Caps the letter at C. Without it the letter would be B (score 76). Moves no points; the score is built from the measured rows.

Rule PAGE_IS_MOSTLY_CODE under scoring rules v34 · fingerprint PAGE_IS_MOSTLY_CODE|/ · persisting (11 scans)

Verify the fix Re-scan after the change. This finding is cleared when PAGE_IS_MOSTLY_CODE is no longer reported at /; if it comes back after clearing, it is marked a regression, not a new finding.

PAGE_IS_MOSTLY_CODE · full transcript

2The homepage is reached through a chain of redirects🔒 What we saw, why it matters, the fix and the evidence bytes are in the licensed report.Note
3HTTPS is served without a Strict-Transport-Security header🔒 What we saw, why it matters, the fix and the evidence bytes are in the licensed report.Note
4Visitors and crawlers are being served an old copy of this page🔒 What we saw, why it matters, the fix and the evidence bytes are in the licensed report.Note

Open the other 3

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The chain a crawler follows

The chain breaks at entity graph. Everything after that point is only reachable by a crawler guessing the conventional path.

✓robots.txtEvery crawler reads this first
✓sitemapNamed in robots.txt and resolves
✓llms.txtPoints onward, links stay on this host
✗entity graphParses as JSON and points home

A machine file that does not parse is worth less than one that is absent, because it looks present. Rows behind this.

Where the bytes go

Of the 628,693 decompressed bytes the homepage delivers, 3.1% is text a reader or a model can actually use. Most of what a crawler downloads here is not words.

  • Readable text 3.1% · 19,240 B
  • Markup & attributes 36.9% · 231,937 B
  • Structured data (JSON-LD) 0.4% · 2,422 B
  • Inline CSS 2.4% · 14,933 B
  • Inline JavaScript 13.4% · 84,458 B
  • Inline SVG 43.7% · 274,678 B
  • HTML comments 0.2% · 1,025 B

The individual blocks that weigh the most, so the fix is a search rather than a hunt:

  • Inline SVG · 29,580 B (4.7%) — unnamedopens <g clip-path="url(#clip0_4_1278)"> <path d="M62.2578 5.72077C55.7074 2
  • Inline SVG · 24,806 B (3.9%) — unnamedopens <g clip-path="url(#clip0_4_1279)"> <path d="M52.819 16.3418C73.4319 16
  • Inline JavaScript · 18,759 B (3%) — unnamedopens (function(){const installationInstructions = [{"label":"Next.js","sdkS
  • Inline SVG · 15,965 B (2.5%) — unnamedopens <g clip-path="url(#clip0_4_1277)"> <path d="M41.4766 73.5342H45.6895L4
  • Inline SVG · 15,347 B (2.4%) — unnamedopens <g clip-path="url(#clip0_4_1282)"> <path d="M80.9854 65.118C81.6015 64

What changed

  1. 2026-10-12the homepage began taking more than one redirect to reachappeared
  2. 2026-10-08resolved: the hsts header asks for browser preloading but does not qualify for itresolved
  3. 2026-10-08a stale edge copy was served againreturned
  4. 2026-10-04score moved 74 → 73score-down
  5. 2026-10-04the stale edge copy clearedresolved
  6. 2026-10-04score moved 75 → 74score-down
  7. 2026-10-03a new finding appeared: the hsts header asks for browser preloading but does not qualify for it againreturned
  8. 2026-09-19resolved: the hsts header asks for browser preloading but does not qualify for itresolved

10 scans on record, first 2026-09-18. Score movements are shown only between readings taken under the same score version; finding codes are comparable across all of them.

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