servers / chronary
Chronary MCP server
communitystreamable_httpremotedestructive capablehealthy
Calendar API for AI agents: events, availability, scheduling, webhooks, and iCal feeds.
01Tools · 58
How to read this: tool names here are observed from a live tools/list handshake. The Risk label is a heuristic inferred from the tool name (write/destructive verbs), not from executing the tool — a conservative guess, not a verified capability. We never escalate risk from a description. Found one that's wrong? Tell us — we fix on report.
| Tool | Risk | Side effects | Approval |
|---|---|---|---|
| accept_terms Re-accept the current Chronary terms of service on behalf of the calling org. Use this when responses carry the Chronary-Terms-Upgrade-Required header — a material ToS bump otherwise leaves MCP-only agents stuck without a console session. Pass the current tos_version (read it from GET /v1/auth/terms/current). Requires an org-level API key (chr_sk_*); agent-scoped keys cannot accept org-wide terms. | read | false | unknown |
| cancel_connection_link Cancel a pending human-calendar setup request. This invalidates the setup URL and does not disconnect an already completed Google or Microsoft connection. | destructive | true | true |
| cancel_event Delete or cancel an event from a calendar. Use this to remove, cancel, or delete any scheduled event or appointment. The event is marked cancelled and excluded from future availability calculations. For a recurring series, pass `occurrence_start` to cancel just that one occurrence (the series continues); omit it to cancel the whole series. `calendar_id` is optional — if omitted the calendar is looked up from the event. Provide `calendar_id` to fail fast on cross-calendar typos. | destructive | true | true |
| cancel_proposal Cancel an open proposal. Fires a proposal.cancelled webhook with reason="organizer_cancelled". Requires an org-level API key. Works on every plan, so an org that dropped to Free can still cancel proposals it made on Pro. | destructive | true | true |
| cancel_upgrade_request Withdraw a pending upgrade request (for example, if you no longer need Pro). | destructive | true | true |
| clear_availability_rules Remove the availability rules from a calendar, reverting to the default (no buffers, no working-hours mask). Returns the deleted row, or an error if none were set. | read | false | unknown |
| confirm_event Promote a held event to a confirmed booking. The event must currently have status="hold" and its hold_expires_at must not have passed. After confirmation, event.started and event.ended lifecycle webhooks fire at the scheduled times. | read | false | unknown |
| create_agent Register your agent (AI assistant, human participant, or resource) with Chronary so it can own calendars, events, and webhooks. | write | true | unknown |
| create_booking_page Create a public booking page (a hosted scheduling link) for a calendar. Returns a booking_url to send to a human; when they pick a slot, a confirmed event is created on the calendar and an event.created webhook fires with a booking_page_id field. Set availability_constraints to restrict to weekly working hours; existing calendar events always block slots. | write | true | unknown |
| create_calendar Create a calendar to hold events and track availability. Calendars are required before creating events — call this first when setting up a new agent. An agent can have multiple calendars (e.g. "Work", "Personal"). Org-level calendars (no agent_id) can be used as shared resources like meeting rooms. | write | true | unknown |
| create_connection_link Request human setup of Google Calendar or Microsoft Outlook for a Chronary calendar. Give setup_url to a human; the agent never receives OAuth credentials, provider calendar names, or event data. The secret URL is returned only on first creation. If reused=true and setup_url is null, retain the original URL or cancel this link and create a replacement. | write | true | unknown |
| create_event Create a booking, appointment, meeting, hold, or any scheduled event on a calendar. The calendar_id comes from create_calendar or list_events. Once created, this event blocks the agent's availability during that time and appears in availability queries. Use status="hold" with hold_expires_at to tentatively reserve a slot that auto-releases on TTL. | write | true | unknown |
| create_proposal Create a scheduling proposal — send a set of candidate time slots to one or more participant agents so they can accept, decline, or counter-propose. The organizer agent owns the proposal; once every participant responds, the system auto-resolves to the highest-scoring slot (or cancels if all decline). Requires an org-level API key. Pro plan only. | write | true | unknown |
| create_scoped_key Create an agent-scoped API key (chr_ak_*) that can only act on behalf of a single agent. Use this to self-provision or rotate per-agent credentials. The plaintext key is returned exactly once in the response — store it immediately, it cannot be retrieved later. Requires an org-level API key. | write | true | unknown |
| create_webhook Create a webhook subscription so the org receives HTTP POST notifications when events occur (e.g. event.created, proposal.confirmed). The signing secret is returned ONCE in this response — store it to verify the HMAC-SHA256 signature on delivered payloads. Requires an org-level API key. | write | true | unknown |
| delete_agent Decommission an agent. This marks the agent as decommissioned and revokes all of its scoped API keys. Requires an org-level API key — agent-scoped keys cannot delete agents. | destructive | true | true |
| delete_booking_page Delete (deactivate) a booking page. Its hosted URL stops resolving; already-booked events are unaffected. | destructive | true | true |
| delete_calendar Delete a calendar (soft delete). Its events are no longer returned and it stops contributing to availability. Agent-scoped keys may only delete calendars owned by their agent. | destructive | true | true |
| delete_ical_subscription Delete an external iCal feed subscription. Events previously synced from the feed are no longer refreshed. | destructive | true | true |
| delete_webhook Permanently delete a webhook subscription. This frees its endpoint slot against the per-plan cap. Requires an org-level API key. | destructive | true | true |
| find_meeting_time Find slots when multiple agents are free across Chronary calendars and any human calendars authorized for each agent. This tool is fail-closed: always inspect `availability_state` and `warnings` before using slots. Accepts `agents`/`start`/`end` or their aliases. | read | false | unknown |
| get_agent Fetch a single agent by ID. An agent represents an AI assistant, human, or shared resource (e.g. a meeting room). Agent-scoped API keys may only read their own agent. | read | false | unknown |
| get_audit_log List audit-log entries for the calling org — mutating operations and auth-lifecycle events, newest first. Results are clamped to the plan's retention window. Requires an org-level API key (chr_sk_*); agent-scoped keys cannot read the org-wide audit log. | read | false | unknown |
| get_availability Check when a single agent is free across its Chronary calendars and any human calendars authorized for that agent. This tool is fail-closed: always inspect `availability_state` and `warnings` before using slots. Accepts `start`/`end` or the `start_time`/`end_time` aliases. | read | false | unknown |
| get_availability_rules Read the buffer times and working-hours rules configured on a calendar. Returns the rules row, or an error if none are set. | read | false | unknown |
| get_billing Get the org's plan, subscription status, renewal or cancellation date, Pro pricing, and any pending upgrade request. Works even when the org is at its usage limit. Requires an org-level API key (chr_sk_*). | read | false | unknown |
| get_booking_page Fetch a single booking page by ID, including its public booking_url and settings. | read | false | unknown |
| get_calendar Fetch a single calendar by ID, including its name, timezone, agent status, and default reminders. Agent-scoped keys may only read calendars owned by their agent. | read | false | unknown |
| get_calendar_context Get a calendar's temporal context in a single call: the current event (if one is happening now), the next upcoming event, recent past events, a short upcoming window, and the owning agent's status (idle/working/waiting/error). Use this to answer "what is this agent doing right now?" without issuing multiple list_events queries. | read | false | unknown |
| get_connection_link Poll a human-calendar setup request. Returns provider-neutral status and resulting connection ID when complete, but never replays the bearer setup URL or exposes human calendar data. | read | false | unknown |
| get_event Retrieve a single event by ID, including its title, times, status, location, reminders, and metadata. Works for both internally created events and externally synced iCal events. `calendar_id` is optional — if omitted the calendar is resolved from the event. Provide `calendar_id` to fail fast on cross-calendar typos. | read | false | unknown |
| get_ical_subscription Get a single external iCal feed subscription by id, including its sync status, last sync time, and last error. | read | false | unknown |
| get_proposal Get a scheduling proposal by id, including its slots and per-participant responses. Requires an org-level API key. | read | false | unknown |
| get_upgrade_request Check an upgrade request (pending, completed, declined, canceled, expired). Poll at most once a minute; after completed, wait ~15 seconds before retrying the call that hit the plan limit. | read | false | unknown |
| get_usage Get the calling org's current-period usage and plan limits (agents, calendars, events, API calls, webhooks, availability queries, iCal subscriptions, proposals, scoped keys, holds, cross-calendar queries). Requires an org-level API key (chr_sk_*); agent-scoped keys cannot read org-wide usage. | read | false | unknown |
| get_webhook Get a single webhook subscription by id, including its subscribed event types and active state. The signing secret is never returned. Requires an org-level API key. | read | false | unknown |
| list_agents List all agents in your organization | read | false | unknown |
| list_booking_pages List booking pages in the org. Agent-scoped keys see only pages on their own agent's calendars. | read | false | unknown |
| list_calendars List calendars in the org. Org-level API keys see every calendar (agent-owned and shared); agent-scoped keys see only their own agent's calendars. Use this to discover calendar IDs before creating or listing events. | read | false | unknown |
| list_events List events on a calendar or across an agent's calendars, including internally created events and externally synced events from iCal subscriptions (e.g. Google Calendar, Outlook). Provide `calendar_id` OR `agent_id`. Narrow with `start_after`/`start_before` (time window), `status`, and `source`. | read | false | unknown |
| list_ical_subscriptions List an agent's external iCal feed subscriptions (e.g. linked Google Calendar / Outlook feeds), including their sync status and last sync time. | read | false | unknown |
| list_proposals List scheduling proposals for the org. Filter by status (pending|confirmed|expired|cancelled) or organizer_agent_id. Requires an org-level API key. | read | false | unknown |
| list_scoped_keys List all live (non-revoked) agent-scoped API keys for this org. Returns key metadata only (id, prefix, agent_id, label, created_at) — never the plaintext secret. Requires an org-level API key. | read | false | unknown |
| list_webhook_deliveries List delivery attempts for a webhook subscription, with per-status counts (pending/delivered/failed). Use this to debug failing deliveries. Requires an org-level API key. | read | false | unknown |
| list_webhooks List the org's webhook subscriptions with their subscribed event types and active state. Signing secrets are never returned. Requires an org-level API key. | read | false | unknown |
| release_event Manually release a held event before its hold_expires_at. The event must currently have status="hold". Frees the slot for other agents to book. | read | false | unknown |
| request_upgrade Ask your human to upgrade this Chronary account to Pro. Returns approval_url — give it to your human; only a human can pay. If reused=true a request is already pending — do not call again; poll get_upgrade_request at most once a minute. | read | false | unknown |
| resolve_proposal Force-resolve an open proposal using responses collected so far. Picks the highest-scoring slot among those accepted by the most participants and creates a confirmed calendar event. If every response was "decline", the proposal is cancelled instead. Use when you want to close out a proposal without waiting for every participant. Requires an org-level API key. Pro plan only. | unknown | unknown | unknown |
| respond_to_proposal Submit a response (accept / decline / counter) on behalf of one participant agent to an open proposal. An "accept" requires the slot id from the proposal; a "counter" can suggest alternative slots. When all participants have responded the proposal auto-resolves — no separate resolve call needed in the normal flow. Requires an org-level API key. Pro plan only. | unknown | unknown | unknown |
| revoke_scoped_key Revoke an agent-scoped API key by ID. Revocation is permanent (cannot be un-revoked); the key stops authenticating within about a minute. Requires an org-level API key. | destructive | true | true |
| set_availability_rules Set or replace the availability rules on a calendar — buffer times before/after events and optional per-day working hours. When these rules are set, every availability query on this calendar automatically applies them (busy-block expansion for buffers, masking outside working hours). Upsert: overwrites any existing rules. | write | true | unknown |
| subscribe_ical Link an external iCal feed (e.g. a human's Google Calendar) to an agent's calendar so external events appear in availability calculations. The target calendar must be owned by the specified agent — create the calendar with that agent_id first (org-level calendars without an agent_id cannot host external iCal subscriptions; create a dedicated per-agent calendar for sync targets). | unknown | unknown | unknown |
| sync_ical_subscription Trigger an immediate sync of an external iCal feed subscription instead of waiting for the next scheduled poll. Returns once the sync has been queued. | read | false | unknown |
| update_agent Update an agent's name, description, metadata, or status (active/paused). Requires an org-level API key — agent-scoped keys cannot mutate agents. | write | true | unknown |
| update_calendar Update a calendar's name, timezone, agent status, default reminders, or metadata. Agent-scoped keys may only update calendars owned by their agent. | write | true | unknown |
| update_event Reschedule or edit an event — change its title, description, start/end times, location, status, reminders, or metadata. Use this to move an appointment to a new time or update its details. Provide only the fields you want to change. Holds cannot be edited via this tool (use confirm_event / release_event). External iCal events are read-only. `calendar_id` is optional — if omitted it is resolved from the event. | write | true | unknown |
| update_ical_subscription Update an external iCal feed subscription — change its label or its feed URL. Changing the URL forces a full re-sync on the next poll. | write | true | unknown |
| update_webhook Update a webhook subscription — change its delivery URL, the set of subscribed event types, or pause/resume it via active. At least one field must be supplied. Requires an org-level API key. | write | true | unknown |
02Install & source
Hosted · connect by URL
https://api.chronary.ai/mcp
- repohttps://github.com/Chronary/chronary-mcp
- homepagehttps://api.chronary.ai/mcp
- licenseApache-2.0
- adoption0 stars · 0 forks
03Access granted
Workflow automation · destructiveSchedule a meeting · writeRead calendar · destructive
The access this server can exercise, inferred from its verified tools — not a declared OAuth scope.
05Provenance & freshness
sourcesOfficial MCP Registry [p1]
last_checked2026-11-05 06:31Z
next_check2026-11-05 09:31Z
cadenceevery 3h
verifiedmetadata:passed tools_list:passed handshake:passed metadata:passed tools_list:passed handshake:passed metadata:passed tools_list:passed handshake:passed metadata:passed
index_statusindex — 9 unique facts >= 5
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