# Vercel — Agent Score

> Score: 87/100 (Grade: B) | Docs: https://vercel.com/docs | Checked: September 9, 2026

Vercel scored 87/100 (B) on Agent Score. 16 of 23 agent-readiness checks passed.

[View full report](https://buildwithfern.com/agent-score/company/vercel)
[All companies](https://buildwithfern.com/agent-score/llms.txt)

## Summary

- Total checks: 23
- Passed: 16
- Warnings: 0
- Failed: 5

## Category Scores

- page-size: 91/100
- observability: 87/100
- url-stability: 100/100
- authentication: 100/100
- content-structure: 100/100
- markdown-availability: 100/100
- content-discoverability: 73/100

## Check Results

### content-discoverability

- [pass] llms.txt found at 2 locations; using https://vercel.com/docs/llms.txt as canonical
- [pass] llms.txt follows the proposed structure (H1, blockquote, heading-delimited link sections)
- [pass] llms.txt is 3,797 characters (under 50,000 threshold)
- [pass] All 10 same-origin sampled links resolve (19 total links)
- [fail] Same-origin links point to HTML and no markdown alternatives detected
- [fail] No llms.txt directive found in HTML of any of 10 sampled pages
- [fail] No llms.txt directive found in markdown of any of 10 sampled pages

### markdown-availability

- [pass] 10/10 sampled pages support .md URLs (100%)
- [pass] 10/10 sampled pages support content negotiation (100%)

### page-size

- [pass] All 10 sampled pages contain server-rendered content
- [pass] All 10 pages under 50K chars (median 10K, max 26K)
- [pass] All 10 sampled pages under 50K chars (median 862K HTML → 24K markdown (97% boilerplate))
- [fail] 2 of 10 sampled pages have content starting past 50% (worst 53%)

### content-structure

- [pass] 4 tab group(s) across 2 of 10 sampled pages; all serialize under 50K chars
- [skip] 2 page(s) with tabs found, but no section headers inside tab panels to evaluate
- [pass] All 24 code fences properly closed across 12 pages

### url-stability

- [pass] All 10 sampled pages return proper error codes for bad URLs
- [pass] All 1 redirect(s) across 10 sampled pages are same-host HTTP redirects

### observability

- [pass] llms.txt covers 100% of 0 sitemap doc pages; 2 nested indexes omitted (1916 sitemap pages excluded); 2348 llms.txt links not in sitemap (may indicate stale links or incomplete sitemap)
- [fail] 2 of 10 pages have substantive content differences between markdown and HTML (avg 19% missing)
- [pass] All 12 endpoints have appropriate cache headers

### authentication

- [pass] All 10 sampled pages are publicly accessible
- [skip] All docs pages are publicly accessible; no alternative access paths needed