Agent readiness report

opendap.org

What an AI agent can and cannot do on this site, measured by an unauthenticated crawl and scored against the published rubric.

Scanned 2026-09-07 · rubric v1.0.1 · scored as a content site · re-scan (results are cached for seven days)

What to fix first

Ranked by impact first, then by how cheap the fix is — the same ordering the engine uses.

1C1
Form usability
High impact · Medium effort
Fix: 4 of 4 inputs have no associated label. A placeholder is not a label — an agent filling your form has no way to know what an unlabelled field wants.
2C4
Machine endpoints and agent manifests
High impact · High effort
Found API documentation link. A second machine surface — an OpenAPI spec or an MCP server — takes this to full marks.
3A4
llms.txt present
Medium impact · Low effort
Publish an llms.txt at the root: an H1, a one-line summary, then described links to your most useful pages. It is a text file and it takes an hour — the cheapest points on this rubric.
4D3
Policies discoverable
Medium impact · Low effort
Fix: no privacy policy linked; no terms page linked.
5D1
Transport security
Medium impact · Low effort
Fix: no Strict-Transport-Security header; 1 insecure subresource reference(s).

Every check, with the evidence

No finding without evidence: each result shows what we actually captured during the crawl.

ADiscovery & access

A1Pass
robots.txt exists and parses
2/2
What we captured
```
{
  "groups": 1,
  "status": 200,
  "sitemaps": 1
}
```
A2Pass
Major AI crawlers allowed
6/6
What we captured
```
{
  "of": 6,
  "allowed": 6,
  "blocked": []
}
```

A3Pass

XML sitemap valid and referenced

3/3

What we captured

{
  "exists": true,
  "urlCount": 3,
  "referencedInRobots": true
}

A4Fail
llms.txt present
0/4
Publish an llms.txt at the root: an H1, a one-line summary, then described links to your most useful pages. It is a text file and it takes an hour — the cheapest points on this rubric.
What we captured
```
{
  "status": 404,
  "present": false
}
```

A5Pass

Bot user-agent HTTP health

3/3

What we captured

{
  "probes": [
    {
      "name": "GPTBot",
      "status": 200,
      "ttfbMs": 481
    },
    {
      "name": "ClaudeBot",
      "status": 200,
      "ttfbMs": 10
    },
    {
      "name": "PerplexityBot",
      "status": 200,
      "ttfbMs": 69
    }
  ],
  "medianTtfbMs": 69,
  "edgeBlockingDespiteRobots": false
}

A6Pass
No hard interstitial
2/2
What we captured
```
{
  "markers": []
}
```

A7Pass

Server-rendered content parity

5/5

What we captured

{
  "ratio": 1,
  "rawTextLength": 3539,
  "renderedTextLength": 3330
}

BUnderstanding

B1Pass

JSON-LD present and valid

5/5

What we captured

{
  "pagesCrawled": 2,
  "pagesWithValidJsonLd": 2,
  "homepageHasValidJsonLd": true,
  "pagesWithInvalidJsonLd": 0
}

B2Pass

Correct schema types for the site type

5/5

What we captured

{
  "matched": [
    "Article",
    "BlogPosting"
  ],
  "missing": [],
  "siteType": "content",
  "typesFound": [
    "Article",
    "BlogPosting",
    "ImageObject",
    "Organization",
    "Person",
    "SearchAction",
    "WebPage",
    "WebSite"
  ]
}

B3Fail

Semantic HTML structure

0/4

Headings and landmarks are how a machine builds an outline of the page. One h1, no skipped levels, and real main/nav/footer elements — all template-level fixes, applied once.

What we captured

{
  "problems": [
    "https://opendap.org: skipped heading level",
    "https://opendap.org/official-hyrax-1-18-release/: 2 h1 elements",
    "https://opendap.org/official-hyrax-1-18-release/: skipped heading level",
    "https://opendap.org/official-hyrax-1-18-release/: missing main"
  ],
  "singleH1": 1,
  "allLandmarks": 1,
  "pagesCrawled": 2,
  "noSkippedLevels": 0
}

B4Pass

Meta and Open Graph

3/3

What we captured

{
  "goodTitles": 2,
  "pagesCrawled": 2,
  "uniqueTitles": true,
  "goodDescriptions": 2,
  "completeOpenGraph": 2
}

B5Pass

Clean text ratio

3/3

What we captured

{
  "perPage": [
    0.074,
    0.189
  ],
  "averageRatio": 0.131
}

B6Partial
Alt text coverage
1/2
17 of 61 content images have no alt text. An agent cannot see the image; the alt attribute is the only description it gets.
What we captured
```
{
  "withAlt": 44,
  "coverage": 0.72,
  "contentImages": 61
}
```

B7Pass

Canonical and duplication hygiene

3/3

What we captured

{
  "hostVariants": [
    {
      "url": "https://www.opendap.org",
      "status": 200
    },
    {
      "url": "http://opendap.org",
      "status": 301,
      "location": "https://www.opendap.org/"
    }
  ],
  "pagesCrawled": 2,
  "selfConsistentCanonicals": 2
}

CActionability

C1Partial
Form usability
2.44/6.11
Fix: 4 of 4 inputs have no associated label. A placeholder is not a label — an agent filling your form has no way to know what an unlabelled field wants.
What we captured
```
{
  "forms": 4,
  "inputs": 4,
  "realSubmit": true,
  "unlabelled": 4,
  "wrongTypes": 0
}
```

C2Partial

Navigable link graph

3.67/4.89

Fix: 32% of links use contextless text like "click here".

What we captured

{
  "anchors": 72,
  "genericLinks": 23,
  "genericRatio": 0.32,
  "hasBreadcrumb": false,
  "clickableNonAnchors": 0
}

C3Pass

Interactive element semantics

4.89/4.89

What we captured

{
  "realButtons": 8,
  "positiveTabindex": 0,
  "clickableNonButtons": 0,
  "keyboardTrapsTested": false
}

C4Partial
Machine endpoints and agent manifests
3.67/6.11
Found API documentation link. A second machine surface — an OpenAPI spec or an MCP server — takes this to full marks.
What we captured
```
{
  "found": [
    "API documentation link"
  ]
}
```
C5Not applicable
Commerce actionability
0/4
Not a commerce site; these points are redistributed across C1–C4.
What we captured
```
{
  "siteType": "content"
}
```
C6Partial
On-site search
2/3
Search exists but posts rather than using a GET query parameter, so an agent cannot construct a results URL directly. Switching to GET is usually a one-line change, and advertising it via WebSite SearchAction schema makes it discoverable.
What we captured
```
{
  "usesGet": false,
  "searchForm": false,
  "searchAction": true
}
```

DTrust & freshness

D1Partial
Transport security
2/4
Fix: no Strict-Transport-Security header; 1 insecure subresource reference(s).
What we captured
```
{
  "hsts": false,
  "tlsValid": true,
  "mixedContentReferences": 1
}
```
D2Partial
Verifiable identity
2/4
Fix: Organization schema has no sameAs links. sameAs links to a company profile are how a model corroborates that you are who the page says you are.
What we captured
```
{
  "sameAsCount": 0,
  "contactDiscoverable": true,
  "hasOrganizationSchema": true
}
```

D3Fail

Policies discoverable

0/4

Fix: no privacy policy linked; no terms page linked.

What we captured

{
  "hasTerms": false,
  "siteType": "content",
  "hasPrivacy": false,
  "hasReturns": false,
  "hasShipping": false
}

D4Partial
Freshness signals
1/4
Fix: sitemap has no lastmod values; only 0% of sitemap URLs modified in the last 90 days. Staleness is a ranking signal for models deciding what to cite.
What we captured
```
{
  "sitemapUrls": 3,
  "withLastmod": 0,
  "visibleDates": true,
  "modifiedLast90Days": 0
}
```

D5Pass

Identity consistency

3/3

What we captured

{
  "title": "Homepage — OPeNDAP",
  "hasFavicon": true,
  "hasOgImage": true,
  "ogSiteName": "OPeNDAP",
  "schemaName": "OPeNDAP"
}

D6Fail
security.txt
0/2
Publish /.well-known/security.txt with a Contact field and a future-dated Expires field. It is a five-line text file.
What we captured
```
{
  "status": 404,
  "present": false
}
```

D7Pass

Multi-page stability

4/4

What we captured

{
  "nonOk": [],
  "slowPages": 0,
  "pagesCrawled": 2,
  "consistentTemplate": true
}

70B

Discovery & access21/25

Understanding20/25

Actionability16.67/25

Trust & freshness12/25

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<a href="https://agentfriendlyrank.com/site/opendap.org">
  <img src="https://agentfriendlyrank.com/badge/opendap.org.svg"
    alt="Agent Readiness Score 70/100, grade B" height="20">
</a>

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opendap.org

What to fix first

Form usability

Machine endpoints and agent manifests

llms.txt present

Policies discoverable

Transport security

Every check, with the evidence

ADiscovery & access

robots.txt exists and parses

Major AI crawlers allowed

XML sitemap valid and referenced

llms.txt present

Bot user-agent HTTP health

No hard interstitial

Server-rendered content parity

BUnderstanding

JSON-LD present and valid

Correct schema types for the site type

Semantic HTML structure

Meta and Open Graph

Clean text ratio

Alt text coverage

Canonical and duplication hygiene

CActionability

Form usability

Navigable link graph

Interactive element semantics

Machine endpoints and agent manifests

Commerce actionability

On-site search

DTrust & freshness

Transport security

Verifiable identity

Policies discoverable

Freshness signals

Identity consistency

security.txt

Multi-page stability

Keep this report

Want this fixed?

Show off your score

Own this site?

Scan your own site