///// Checks / Readability
Agent-friendly 404s
What an agent gets on a path that doesn't exist: a real 404 status, and whether the error body is readable Markdown.
- Check id
agent-friendly-404- Pillar
- Readability
- Runs in
- The free CLI
- Scoring
- Up to 2 points
- Status
- Pre-release, in calibration
Why it matters
A 200 that says 'not found' looks like content. A clear 404 with a short explanation tells the agent where to go next.
How to pass
Return 404 or 410 for missing pages and, for agents, a short Markdown body that links your docs or llms.txt.
Run it
Find agent-friendly-404 in the report. Add --md for a fix prompt you can paste into Claude Code, Codex or Cursor.