I'm In! MCP server

Which servers in the official MCP registry are I'm In!'s own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-19

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Whose server it is

Registry nameevents.im-in/sign-up-sheetsverified in the MCP registry

The registry name sits under im-in.events. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-19

Stateanswerschecked 2026-10-19
Tools3
Server calls itselfim-in-events
Server version1.0.0
Protocol version2025-06-18

On 2026-10-19 the server answered initialize and tools/list without a sign-in. First answer in 93 ms.

Measured dailydaily checks: 1, the first on 2026-10-19

Answeredmeasuring1 of the 7 daily checks it takes to print a share
Median first answer94 ms
Space in an agent's context≈ 463 tokensthe definitions of all its tools (3), which an agent carries on every turn
Tool definitionsA · 100 of 100

Every tool passes all six checks.

Worth a look

Tools that change data, on a server that answers without a sign-in: create_signup_sheet

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.

Tools it offers3 tools · read 2026-10-19

draft_sheet_link
Turn the user's email, notes, flyer text or description of their event into a link that opens im-in.events with those words in the Describe it box. Pressing Make my draft there builds the whole sign-up sheet (dates, times, place, every…
list_templates
List I'm In! sign up sheet templates (potluck, meal train, volunteer shifts, ...) with their prefilled slots.
create_signup_sheet
Create a live sign-up sheet on im-in.events from a title, slot names and a time zone. Returns the shareable sheet URL and emails a private manage and claim link to owner_email, the user's own address. One sheet per owner email a day.

How to connect

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

{
  "mcpServers": {
    "sign-up-sheets": {
      "type": "http",
      "url": "https://im-in.events/api/mcp"
    }
  }
}

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.