# Slack Developer — Agent Score

> Score: 70/100 (Grade: C) | Docs: https://api.slack.com/docs | Checked: April 3, 2026

Slack Developer scored 70/100 (C) on Agent Score. 11 of 22 agent-readiness checks passed.

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

## Summary

- Total checks: 22
- Passed: 11
- Warnings: 2
- Failed: 4

## Check Results

### content-discoverability

- [pass] llms.txt found at 1 location(s)
- [pass] llms.txt follows the proposed structure (H1, blockquote, heading-delimited link sections)
- [pass] llms.txt is 40,604 characters (under 50,000 threshold)
- [pass] All 10 links are external and resolve (165 total links)
- [skip] All 165 links are external; cannot assess markdown support
- [fail] No llms.txt directive found in any of 1 pages

### markdown-availability

- [fail] No pages support .md URLs (0/1 tested)
- [fail] Server ignores Accept: text/markdown header (0/1 pages return markdown)

### page-size

- [pass] All 1 pages contain server-rendered content
- [skip] Skipped: dependency check did not pass
- [pass] All 1 pages convert under 50K chars (median 13K, 64% boilerplate)
- [warn] 1 of 1 pages have content starting at 10–50% (worst 27%)

### content-structure

- [pass] No tabbed content detected across 1 pages
- [pass] No tabbed content found; header quality check not applicable
- [pass] All 0 code fences properly closed across 1 pages

### url-stability

- [fail] 1 of 1 pages return 200 for non-existent URLs (soft 404)
- [warn] 1 of 1 pages use cross-host redirects

### observability

- [skip] No page URLs found in llms.txt
- [skip] Skipped: dependency check did not pass
- [pass] All 2 endpoints have appropriate cache headers

### authentication

- [pass] All 1 pages are publicly accessible
- [skip] All docs pages are publicly accessible; no alternative access paths needed