# markdown-negotiation-adoption-2026

> Markdown content-negotiation adoption — ~3.9 % of sites serving agents markdown

_State of the Agentic Web · /state-of-the-agentic-web/markdown-negotiation-adoption-2026 · [JSON](/api/state-of-the-agentic-web/markdown-negotiation-adoption-2026) · [all State of the Agentic Web](/state-of-the-agentic-web)_

- **metric:** Markdown content-negotiation adoption
- **metric_family:** standard-adoption
- **measures_pillar:** /agent-readiness
- **entity_measured:** markdown twins
- **value:** ~3.9
- **unit:** % of sites serving agents markdown
- **date:** 2026
- **period:** 2026-Q2
- **figure_kind:** reported
- **source_or_methodology:** https://— third-party estimate; confirm at build
- **verify_status:** verify-against-primary-at-build
- **trend:** flat
- **last_verified:** 2026-06-15
- **note:** ecosystem estimate, not primary-confirmed