# Vercel — Agent Score

> Score: 83/100 (Grade: B) | Docs: https://vercel.com/docs | Checked: April 3, 2026

Vercel scored 83/100 (B) on Agent Score. 13 of 22 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: 22
- Passed: 13
- Warnings: 4
- Failed: 3

## Check Results

### content-discoverability

- [pass] llms.txt found at 1 location(s); 1 failed to fetch
- [warn] llms.txt contains parseable links but doesn't fully follow the proposed structure: https://vercel.com/llms.txt: No blockquote summary found
- [fail] llms.txt is 348,470 characters (exceeds 100,000 threshold; will be truncated by most agents)
- [pass] All 10 same-origin sampled links resolve (1717 total links)
- [warn] Same-origin links point to HTML, but 3 have .md variants available
- [warn] llms.txt directive found in 9 of 10 sampled pages, but buried deep in the page (past 50%)

### markdown-availability

- [pass] 10/10 sampled pages support .md URLs (100%)
- [pass] 9/10 sampled pages support content negotiation (90%)

### page-size

- [pass] All 10 sampled pages contain server-rendered content
- [pass] All 10 pages under 50K chars (median 8K, max 17K)
- [fail] 10 of 10 sampled pages convert to over 100K chars (max 625K, 43% boilerplate)
- [pass] Content starts within first 10% on all 10 sampled pages (median 4%)

### content-structure

- [pass] 6 tab group(s) across 4 of 10 sampled pages; all serialize under 50K chars
- [skip] 4 page(s) with tabs found, but no section headers inside tab panels to evaluate
- [pass] All 33 code fences properly closed across 11 pages

### url-stability

- [pass] All 10 sampled pages return proper error codes for bad URLs
- [pass] No redirects detected across 10 sampled pages

### observability

- [warn] llms.txt covers 1257/1495 sitemap doc pages (84%); 238 missing; 22 llms.txt links not in sitemap (may indicate stale links or incomplete sitemap)
- [fail] 3 of 10 pages have substantive content differences between markdown and HTML (avg 20% missing)
- [pass] All 11 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