# OpenRouter — Agent Score

> Score: 91/100 (Grade: A) | Docs: https://openrouter.ai/docs/ | Checked: April 8, 2026

OpenRouter scored 91/100 (A) on Agent Score. 17 of 22 agent-readiness checks passed.

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

## Summary

- Total checks: 22
- Passed: 17
- Warnings: 2
- Failed: 2

## Category Scores

- page-size: 99/100
- observability: 79/100
- url-stability: 100/100
- authentication: 100/100
- content-structure: 100/100
- markdown-availability: 100/100
- content-discoverability: 81/100

## Check Results

### content-discoverability

- [pass] llms.txt found at 1 location(s)
- [warn] llms.txt contains parseable links but doesn't fully follow the proposed structure: https://openrouter.ai/docs/llms.txt: No blockquote summary found
- [pass] llms.txt is 39,995 characters (under 50,000 threshold)
- [pass] All 10 same-origin sampled links resolve (200 total links)
- [pass] 10/10 same-origin sampled links point to markdown content (100%)
- [fail] No llms.txt directive found in 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 convert under 50K chars (median 10K, 0% boilerplate)
- [warn] 2 of 10 sampled pages have content starting at 10–50% (worst 41%)

### content-structure

- [pass] No tabbed content detected across 10 sampled pages
- [pass] No tabbed content found; header quality check not applicable
- [pass] All 78 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

- [pass] llms.txt covers 99% of 199 sitemap doc pages
- [fail] 4 of 10 pages have substantive content differences between markdown and HTML (avg 25% 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