Perfect Clock
cc.perfectclock/perfect-clockperfectclock.ccstreamable-httpv1.0.0Scanned
Find meeting times across time zones and compare working hours.
2 tools: 2 change things.
- Reads private data · 1
- Reads text others write · 0
- Can send data out · 0
- 1 finding
Anlyon alternative
2 of these tools change something. Run those as governed actions.
Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.
Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.
Import an OpenAPI spec →Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
2 tools
Changes things 2Claude Code: ask
find_meeting_windowsFinds when people in other time zones can meet, when the time is not decided yet: the windows on each day when all participants are within their working hours, accounting for weeke…Reads private data1 finding
Why it is in this group
- The name "find_meeting_windows" says "find": a word for reading.
- The server marks it as not read-only (readOnlyHint: false).
What it can reach
- private-dataThe name "find_meeting_windows" says "find" and "meeting": it reads calendars.
Findings
- Warn
The server marks "find_meeting_windows" as not read-only (readOnlyHint: false), and its words say it reads.
What this check looks forMatched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The name "find_meeting_windows" says "find": a word for reading.
Description, as the server wrote it Finds when people in other time zones can meet, when the time is not decided yet: the windows on each day when all participants are within their working hours, accounting for weekends, public holidays and daylight-saving changes, and one suggested start time that fits the most days. Saves that suggested time on those days for 30 days and returns a private perfectclock.cc/s/... link that opens it in Perfect Clock.
Annotations the server declares
- title: Find meeting windows
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
plan_meeting_schedulePlans a one-off or recurring meeting with people in other time zones when its time is known (e.g.No findings
Why it is in this group
- The name "plan_meeting_schedule" says "schedule": a word for a change.
Description, as the server wrote it Plans a one-off or recurring meeting with people in other time zones when its time is known (e.g. "every other Tuesday at 10:00 Berlin time with Anna in Tbilisi"). Expands it into concrete dates and shows each one in every participant's local time, with working-hours checks, public holidays and daylight-saving shifts. Saves the schedule for 30 days and returns a private perfectclock.cc/s/... link that opens it in Perfect Clock.
Annotations the server declares
- title: Plan a meeting schedule
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged untrusted-input or outbound.
- Reads private data1
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write0
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Findings
Matches of fixed checks, with the text they matched.
The server marks "find_meeting_windows" as not read-only (readOnlyHint: false), and its words say it reads.
What this check looks forMatched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":false,"openWorldHint":false}; The name "find_meeting_windows" says "find": a word for reading.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http perfect-clock https://perfectclock.cc/mcpclaude mcp add --transport http perfect-clock https://perfectclock.cc/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [],
"ask": [
"mcp__perfect-clock__plan_meeting_schedule",
"mcp__perfect-clock__find_meeting_windows"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as perfect-clock. Review it before you use it.
Capability tags behind 1 rule
- mcp__perfect-clock__find_meeting_windows private-data
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/cc.perfectclock/perfect-clock/verify?hash=93cf68c97a1f67fbc3d951627e2348913c2d4f7c1cf3f2cbb241efb07860a0f7" | jq -e '.changed == false'Pinned hash 93cf68c97a1f, from Oct 25, 2026, 19:18 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/cc.perfectclock/perfect-clock/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/cc.perfectclock/perfect-clock)Source: MCP Registry. Synced Oct 25, 2026, 19:17 UTC.