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Leaderboard/HubSpot

HubSpot

developers.hubspot.com/docs
Score: 94 out of 100, grade A94
Grade A
Last checked: September 11, 2026 · afdocs v0.18.7 · Rerun · Request listing
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Simulation: Fern // bud
Day 0
CategoryBusiness
Checks passed20/23Warnings0Failed2

HubSpot scores 94/100 (Grade A), placing it among the most AI-agent-ready documentation sites evaluated. It passes 20 of 23 checks (87%), demonstrating strong support for AI coding agents. 2 items require attention to reach a perfect score.

# Agent Score Fix Report — HubSpot
URL: https://developers.hubspot.com/docs
Score: 94/100 (Grade A)

I need help improving the AI-readiness of the documentation at https://developers.hubspot.com/docs.
Agent Score found 2 failing checks and 0 warnings.

## Failing Checks (2)
- [page-size] Content Start Position: 9 of 10 sampled pages have content starting past 50% (worst 107%)
- [observability] Llms Txt Coverage: llms.txt covers 0/1 sitemap doc pages (0%); 1 missing; 410 llms.txt links not in sitemap (may indicate stale links or incomplete sitemap)



## Fix Instructions

For each issue above, please:
1. Analyze the documentation site at https://developers.hubspot.com/docs
2. Implement the specific fix
3. Verify the fix would cause the check to pass

### Common fixes:
- **No llms.txt**: Create /llms.txt following https://llmstxt.org — list all doc pages in markdown format
- **No .md URL support**: Configure your docs platform to serve pages at equivalent .md URLs (e.g. /docs/quickstart.md)
- **No content negotiation**: Return markdown when request includes Accept: text/markdown header
- **Large page size**: Reduce nav boilerplate, inline scripts, and repetitive markup
- **No sitemap**: Generate /sitemap.xml listing all documentation URLs
- **Auth walls**: Ensure docs pages return 200 without requiring login cookies or tokens
- **No Last-Modified header**: Configure your server/CDN to include Last-Modified response headers
- **Tab content hidden**: Ensure tabbed content is rendered in the HTML (not JS-only) so agents can read all variants

## Run afdocs Locally for More Detail

To get deeper visibility into what's failing, run afdocs against your docs:

  npx afdocs check https://developers.hubspot.com/docs --fixes --verbose

- **--fixes**: Adds "Fix:" lines to the output for each warn/fail check with actionable remediation steps
- **-v, --verbose**: Shows per-page details (specific URLs, character counts, error codes) for checks with issues — useful for per-URL visibility into what's failing
CHECK RESULTS

How your docs scored

auth-gate-detectionAll 10 sampled pages are publicly accessibleLearn more
auth-alternative-accessAll docs pages are publicly accessible; no alternative access paths neededLearn more
llms-txt-coveragellms.txt covers 0/1 sitemap doc pages (0%); 1 missing; 410 llms.txt links not in sitemap (may indicate stale links or incomplete sitemap)Learn more
markdown-content-parityAll 1 pages have equivalent markdown and HTML content (avg 0% missing)Learn more
cache-header-hygieneAll 11 endpoints have appropriate cache headersLearn more
content-start-position9 of 10 sampled pages have content starting past 50% (worst 107%)Learn more
rendering-strategyAll 10 sampled pages contain server-rendered contentLearn more
page-size-markdownAll 1 pages under 50K chars (median 12K, max 12K)Learn more
page-size-htmlAll 10 sampled pages under 50K chars (median 0 HTML → 15 markdown (10% boilerplate))Learn more
llms-txt-existsllms.txt found at https://developers.hubspot.com/docs/llms.txtLearn more
llms-txt-validllms.txt follows the proposed structure (H1, blockquote, heading-delimited link sections)Learn more
llms-txt-sizellms.txt is 39,719 characters (under 50,000 threshold)Learn more
llms-txt-links-resolveAll 10 same-origin sampled links resolve (70 total links)Learn more
llms-txt-links-markdown10/10 same-origin sampled links point to markdown content (100%)Learn more
llms-txt-directive-htmlllms.txt directive found in HTML of all 1 sampled pages, near the top of content; 9 failed to fetchLearn more
llms-txt-directive-mdllms.txt directive found in markdown of all 1 sampled pages, near the top of content; 9 had no markdown versionLearn more
markdown-url-support1/1 sampled pages support .md URLs (100%)Learn more
content-negotiation1/1 sampled pages support content negotiation (100%)Learn more
tabbed-content-serializationNo tabbed content detected across 10 sampled pagesLearn more
section-header-qualityNo tabbed content found; header quality check not applicableLearn more
markdown-code-fence-validityAll 0 code fences properly closed across 2 pagesLearn more
http-status-codesAll 10 sampled pages return proper error codes for bad URLsLearn more
redirect-behaviorNo redirects detected across 10 sampled pagesLearn more

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