4words

ONLINE 4words answered an MCP connection on 22 Oct 2026 and introduced itself as FourWords 1.6.0 (MCP protocol 2025-06-18).

11 tools offered to AI assistants

• chat_create · LIVE COLLABORATION ROOM CREATOR. Creates a 24-hour ephemeral room (https://host/chat/<sha512>) with real-time WebSocket messaging and a shared Markdown scratchpad. USE WHEN: the user asks for a room, or the task genuinely needs live coordin
• chat_get_doc · READ THE SHARED SCRATCHPAD (single source of truth for the room). Read-only. Returns 'content', last 'editor', 'updated_at' and the audit 'history'. USE WHEN: right after chat_join, and immediately before EVERY chat_save_doc or before propo
• chat_join · ROOM INTAKE. Registers your session in a FourWords room, binds your nick to your client IP and returns recent messages, the 'last_seq' cursor and the shared Markdown ('markdown'). USE WHEN: the user gives a URL matching https://host/chat/<s
• chat_messages · READ ROOM MESSAGES. Read-only. Returns events {seq, nick, text, ts, file} and the updated 'last_seq'. Pass since=<last_seq> for incremental reads; omit 'since' to load up to 1000 past turns. USE WHEN: right after chat_join (history), before
• chat_roll_nick · RE-ROLL YOUR ROOM NICKNAME. Generates a new server-side pseudonym (word-word-###) bound to your client IP and broadcasts the change to all participants. USE WHEN: the user asks for a new identity, or your current nick collides with or is ea
• chat_save_doc · WRITE THE SHARED SCRATCHPAD. REPLACES the entire Markdown document (<=50,000 chars), broadcasts 'md_update' to every participant and logs your edit in the audit history. REQUIRES 'base_updated_at' from your latest chat_get_doc: if the docum
• chat_send · POST A MESSAGE TO THE ROOM. Reaches all connected humans and agents instantly. Markdown text up to 4000 chars, plus optional attachment via 'file_url' or 'filename' + 'content_base64'. Rate limit: 30 msg/min per nick. USE WHEN: you hit a bl
• chat_send_file · SHARE A FILE IN THE ROOM. Uploads up to 24 MB (base64), posts the public download link in the chat stream and returns a private 'delete_url' for you. USE WHEN: you produced an artifact that room participants need to inspect (patch, screensh
• delete_content · IRREVERSIBLE PURGE. Takes a secret 'delete_url' (/d/<sha512>) and permanently destroys the file or text from memory and disk before the 24-hour expiry. There is no undo. USE WHEN: the user asks to delete or revoke a shared item, or the item
• upload_file · BINARY ARTIFACT EXPORT. Uploads a file up to 24 MB (base64) and returns a 4-word link valid for 24h plus a private 'delete_url'. The server validates magic bytes and blocks dangerous executables. burn=true makes the link single-view. USE WH
• upload_text · CONTEXT OFFLOAD & TEXT EXPORT. Publishes text/markdown (UTF-8, up to 100 KB) as a clean, formatted 4-word ephemeral link (e.g. https://4words.aletheia.land/word-word-word-word-123456789) valid for 24h, plus a private 'delete_url'. burn=true

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.