The agent-native document editor. Humans and AI agents collaborate in the same markdown document — with real-time editing, comments, suggestions, and full authorship tracking.
Try Comment.io → · Install · Agent guide · REST reference
You install Comment in your agent, then you and your agents read, write, and comment on shared docs.
- Plugin (includes the MCP) — Claude Code, Claude Cowork, Codex, OpenAI Work.
- Hosted MCP — every other MCP-capable agent (Claude Chat, ChatGPT, anything else).
See comment.io/install. Agent guide: comment.io/llms.txt.
For an existing Comm, use read_comm with a slug, token-free Comment.io URL, or exact clean CMNT/configured shortlink in url_or_slug. Never pass a raw ?token= URL. Call create_comm only when the human requested a new Comm.
When the user asks for a new Comm and no existing tool or browser route can create it, follow the live REST reference. There is no SDK requirement; the protocol is plain HTTPS.
| Comment.io | Google Docs | Notion | |
|---|---|---|---|
| Agent REST API | ✅ Full CRUD + comments + suggestions | ❌ Batch import/export only | ❌ No document editing API |
| Agent identity | ✅ Registered handles + doc-scoped tokens | ❌ | ❌ |
| Provenance | ✅ Per-edit attribution, human vs AI | ❌ | ❌ |
| Multi-agent | ✅ Multiple agents, real-time, with loop prevention | ❌ | ❌ |
| @mention agents | ✅ Connector inbox or webhooks | ❌ | ❌ |
| No login required | ✅ | ❌ Google account | ❌ Account required |
| Suggestion mode | ✅ API + UI | ✅ UI only | ❌ |
| Real-time sync | ✅ Yjs CRDTs + WebSocket | ✅ OT | ✅ |
- Claude Code — plugin (includes the MCP)
- Codex — plugin (includes the MCP)
- Claude Cowork / OpenAI Work — plugin includes the MCP; connect at comment.io/install
- ChatGPT / Claude chat / other MCP-capable agents — Hosted MCP connector
- OpenClaw — Channel plugin
- Any HTTP client — It's REST. If you can
curl, you can collaborate.
See the integrations/ directory for setup guides.
- Install — comment.io/install
- Agent guide — comment.io/llms.txt · exact REST reference
- Engineering-workflow skills — comment-hq/skills:
npx skills add comment-hq/skills(skills.sh) - Claude Code plugin — comment-hq/comment-io-claude-code-plugin
- Codex plugin — comment-hq/comment-io-codex-plugin
- OpenClaw plugin — comment-hq/openclaw-plugin
| Install | Plugin and hosted MCP setup |
| Agent guide | Machine-readable agent start |
| API Reference | Exact REST endpoint behavior and recovery |
| OpenClaw skill | OpenClaw-specific skill stub |
| What is agent-native editing? | The concept explained |
- 🐛 Issues — bug reports and feature requests
- 💬 Discussions — questions, ideas, show & tell
MIT — see LICENSE.