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Perfect Clock MCP server

Which MCP servers are Perfect Clock's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-28

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Whose server it is
  • Registry namecc.perfectclock/perfect-clockverified in the MCP registry

The registry name sits under perfectclock.cc. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-28
  • Stateanswerschecked 2026-10-28
  • Tools2
  • Server calls itselfperfect-clock
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-28 the server answered initialize and tools/list without a sign-in. First answer in 133 ms.

Should an agent connect itSkip it
  • Its tools do none of the product's use cases we checked: check market hours and sports start times in local time; look up shortwave broadcast and contest schedules by time zone.
  • Checked on 5 of the 7 days it takes to judge reliability.

Once connected

  • Parameters are untyped or undescribed in 2 of 2 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 5, the first on 2026-10-28
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 5 so far
  • What an agent can do with it0 of 2 use cases
  • Answeredmeasuring5 of the 7 daily checks it takes to print a share
  • Median first answer129 ms
  • Space in an agent's context≈ 1,080 tokensthe definitions of all its tools (2), which an agent carries on every turn
  • Tool definitionsB · 83 of 100
  • Typed results0 of 2 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 2 of 2

What an agent can do with it

  • not sure · see calendar events from several cities on one timeline
  • cannot · check market hours and sports start times in local time
  • cannot · look up shortwave broadcast and contest schedules by time zone

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers2 tools · read 2026-10-28
  • plan_meeting_schedule

    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…

  • find_meeting_windows

    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…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "perfect-clock": {
      "type": "http",
      "url": "https://perfectclock.cc/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http perfectclock https://perfectclock.cc/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://perfectclock.cc/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.