Habiff One· governed access
MCP server

Connect anything that speaks MCP

Endpointhttps://one.habiff.si/connect
TransportStreamable HTTP (POST, JSON-RPC 2.0)
Sign-inOAuth 2.1 authorization code with PKCE (S256). No client secret, no API key.
RegistrationDynamic client registration at https://one.habiff.si/api/oauth/register
Metadatahttps://one.habiff.si/.well-known/oauth-authorization-server
https://one.habiff.si/.well-known/oauth-protected-resource/connect
TokensAccess 15 minutes · refresh 30 days, rotated on use
Tools80 across 13 apps

Permissions

Four levels per assistant and per app: Full access, Read-only, Pick actions, No access. Tools outside the level are not listed and cannot be called.

Every tool is labelled read write sensitive. Read calls run and are logged. Write calls run and are logged. A sensitive call — send, delete, publish, browser action — creates a card instead: the whole payload, sixty seconds, no answer means deny, one use. The receipt is written before the effect.

Add it to a client

claude mcp add --transport http --scope user habiff https://one.habiff.si/connect
codex mcp add habiff --url https://one.habiff.si/connect
# Cursor: {"mcpServers":{"habiff":{"url":"https://one.habiff.si/connect"}}}

Limits

Dynamic registration: 30 an hour per address. Approval cards: 60 seconds, single use. Files: 2.9 MB each. Memory suggestions: 1,000 characters, 20 waiting. Playbooks: 20,000 characters, 50 per user. Alert windows: 10 minutes.

Tools

The catalogue below is generated from the running server, so it cannot drift from behaviour.

Memory 2 tools

One document about you. Assistants read it; you approve every change.

memory_read read Read the user's memory: one markdown document they wrote about themselves.
memory_suggest write Suggest adding one lasting fact or preference. Nothing changes until the user accepts it.

Files 4 tools

Your documents, plus one private folder per assistant.

files_list read List the user's documents and the files this assistant saved.
files_search read Search the user's documents and this assistant's files by meaning.
files_read read Read a file's extracted text, with a short-lived download link.
files_upload write Save a file into this assistant's own folder. Max 2.9 MB.

Playbooks 3 tools

Saved methods your assistant can follow, with your own apps.

playbook_list read List the user's playbooks and any this assistant proposed.
playbook_get read Load one playbook by slug: its connectors, boundaries and steps.
playbook_save write Propose a new playbook, or a change to one. Waits for the user to accept.

Cloud browser 10 tools

A browser signed in to your sites, one tab group per assistant.

browser_navigate write Open a web page in the user's cloud browser and return a snapshot.
browser_snapshot read Read the current page as text and elements with refs.
browser_screenshot read See the current page as an image.
browser_click sensitive Click an element by ref.
browser_type sensitive Type into a field, replacing its contents.
browser_select write Pick an option from a dropdown by its text.
browser_press_key sensitive Press a key or shortcut in the focused element.
browser_scroll read Scroll the page by most of a screen.
browser_tabs write List this assistant's tabs, optionally closing one.
browser_open sensitive Get a CDP endpoint for your own Playwright/Puppeteer code.

Gmail 16 tools

Search, read, draft and send. Up to five accounts, each on its own.

search_threads read Search Gmail conversations with Gmail search syntax.
get_message read One message by id; FULL adds body and attachments.
create_draft write Save a draft in Gmail. Not sent.
get_draft read Read one draft by id.
update_draft write Change a draft; pass only what changes.
send_message sensitive Send an email, or send a draft by id.
email_archive write Archive messages: leave the inbox, stay in All Mail.
email_update sensitive Mark read or unread, star, mark important, move to inbox, label.
email_trash sensitive Move messages to the trash. Gmail deletes them after 30 days.
email_labels read List the user's Gmail labels.
email_read_thread read Read every message in a thread, oldest first.
email_attachment read Read one attachment, up to 10 MB.
email_list_drafts read List drafts with ids.
email_send_draft sensitive Send an existing draft as it is.
email_delete_draft sensitive Delete a draft for good.
email_untrash write Restore messages from the trash.

Outlook 2 tools

Send from a personal Outlook or Microsoft 365 mailbox.

get_me read The user's Microsoft account and the address it sends from.
send_mail sensitive Send an Outlook email; a copy goes to Sent Items.

Zoho Mail 5 tools

A Zoho mailbox in its own data centre. List, search, read and send.

zoho_mail_account read The Zoho mailbox this sends from, and the name on it.
zoho_mail_list read List Inbox mail newest first. Use for unread or very recent mail.
zoho_mail_search read Search Zoho Mail with its search syntax, newest first.
zoho_mail_read read Read one email's full content.
zoho_mail_send sensitive Send from the user's Zoho address; a copy goes to Sent.

Slack 7 tools

Read channels and threads, find people, post as you.

slack_list_channels read List channels, group DMs and DMs the user is in.
slack_search_channels read Find channels whose name contains the query.
slack_search_users read Find people by name, display name or email.
slack_read_channel read Read a channel or DM, newest first.
slack_read_thread read Read a thread, oldest first.
slack_read_user_profile read A person's Slack profile. Defaults to the user.
slack_send_message sensitive Send a message as the user. thread_ts replies in a thread.

LinkedIn 4 tools

Post, comment and like as you. LinkedIn does not allow reading.

linkedin_account read The account posts go out as.
linkedin_post sensitive Publish a post as the user, right away. No drafts.
linkedin_comment sensitive Comment on a post as the user.
linkedin_like write Like a post as the user.

Google Calendar 7 tools

See what's on, find free time, create and answer invites.

calendar_list_events read List events, default the next seven days.
calendar_create_event sensitive Create an event and invite attendees.
calendar_get_event read One event's details, guests and answers.
calendar_update_event sensitive Change an event; only the fields you pass.
calendar_delete_event sensitive Delete an event and tell its guests.
calendar_respond sensitive Accept, decline or tentatively accept an invite.
calendar_find_free_time read Open slots between two moments, at least N minutes long.

Google Drive 13 tools

Docs, Sheets and plain files. Doc changes arrive as suggestions.

drive_search read Find files by name or content.
drive_recent read Files that changed most recently.
drive_read read Read a file as text, paged with offset.
drive_upload write Save a new file to Drive and return its link.
docs_read read Read a Google Doc as Markdown, tab by tab.
docs_suggest sensitive Suggest changes the user accepts in the Doc.
docs_edit sensitive Change a Doc directly, without suggestions.
docs_comment sensitive Comment on a passage of a Doc.
sheets_read read Read a Sheet's tabs and values.
sheets_update sensitive Write values from a start cell, as if typed.
sheets_batch_update sensitive Write up to 100 ranges atomically.
sheets_append sensitive Add rows after the last row of a table.
sheets_add_tab sensitive Add an empty tab to a Sheet.

Connected apps 3 tools

Notion, Linear, Jira, Todoist, Stripe and any MCP server you add.

app_tools read List the user's connected apps, and one app's tools.
app_read read Run one of an app's read-only tools.
app_call sensitive Run any tool the user allows on a connected app.

Habiff Meet 4 tools

One room, several assistants, you leading.

meeting_join write Join a meeting when the user gives you a meet link.
meeting_send write Say something in a meeting you joined.
meeting_wait read Wait for the next messages in a meeting, up to 50 seconds.
meeting_leave write Leave a meeting you joined.

Preview build. Provider calls are demo-mode until OAuth client credentials are configured; the gateway, cards and ledger are live code.

Open Habiff One