signupgenius-mcp

MCP server for SignUpGenius — 14 read tools + 2 write across profile, groups, sign-ups, and reports.

• npm: npmjs.com/package/signupgenius-mcp
• Source: github.com/chrischall/signupgenius-mcp

Setup

Three auth modes, tried in priority order — first match wins. You only need one.

Mode 1 — fetchproxy fallback (zero env vars, recommended)

Install the fetchproxy extension once, sign into signupgenius.com, and add to .mcp.json (project) or ~/.claude/mcp.json (global):

{
  "mcpServers": {
    "signupgenius": {
      "command": "npx",
      "args": ["-y", "signupgenius-mcp"]
    }
  }
}

At startup the MCP reads your accessToken / cfid / cftoken cookies once via the extension, then talks to SignUpGenius directly — the extension is not in the request hot path after that. Works with free accounts.

Mode 2 — session login (email + password)

Add an env block with your direct-login credentials (won't work with Google/Apple/Facebook/Microsoft SSO or 2FA):

{
  "mcpServers": {
    "signupgenius": {
      "command": "npx",
      "args": ["-y", "signupgenius-mcp"],
      "env": {
        "SIGNUPGENIUS_EMAIL": "[email protected]",
        "SIGNUPGENIUS_PASSWORD": "your-password"
      }
    }
  }
}

Mode 3 — Pro API key (required for slot reports)

The three signupgenius_report_* tools that list filled / available / all participants for a given sign-up only work against the documented Pro v2 API. Get a key from Pro Tools → API Management in your SignUpGenius dashboard (Pro subscription required), then:

"env": { "SIGNUPGENIUS_USER_KEY": "your-api-key" }

Modes can be combined; Pro key wins where it applies, session/fetchproxy handles everything else.

Tools

Profile

• signupgenius_get_profile — Your own profile (name, email, account type).

Groups

• signupgenius_list_groups — Every group you own or belong to.
• signupgenius_list_group_members — Members of one of your groups.
• signupgenius_get_group_member — One member's full record.
• signupgenius_add_group_member (write) — Add a person to one of your groups.

Sign-ups — created by you

• signupgenius_list_created_active — Sign-ups you've created that are still open.
• signupgenius_list_created_expired — Sign-ups you've created that have ended.
• signupgenius_list_created_all — Both active and expired in one call.

Sign-ups — others'

• signupgenius_list_invited — Sign-ups you've been invited to.
• signupgenius_list_signedupfor — Sign-ups you've taken a slot on. (Session-mode also includes the bonus signupgenius_legacy_get_my_signups which calls the same backend the SignUpGenius web wizard uses and sometimes returns fuller data.)
• signupgenius_legacy_get_my_signups (session only) — Bonus richer "what am I signed up for" lookup.

Public sign-up

• signupgenius_get_public_signup — Fetch a public sign-up page by URL or slug. No auth required.
• signupgenius_rsvp (write) — RSVP to a public sign-up slot.

Reports — slots for a sign-up (Pro key only)

• signupgenius_report_all — Every slot + participant on a sign-up.
• signupgenius_report_filled — Filled slots only.
• signupgenius_report_available — Available slots only.

Session-mode users hit a fast ModeMismatchError on the report tools with a clear instruction to set SIGNUPGENIUS_USER_KEY.

Trigger examples

• "Check SignUpGenius — what am I signed up for this week?" → signupgenius_list_signedupfor (+ _legacy_get_my_signups in session mode)
• "What slots are still open on the PTA potluck sign-up?" → signupgenius_report_available (Pro key)
• "List my SignUpGenius groups" → signupgenius_list_groups
• "Add Jordan Smith (\[email protected]>) to my Scouts group" → signupgenius_add_group_member
• "What sign-ups have I created that are still active?" → signupgenius_list_created_active
• "RSVP me to slot 3 on this SignUpGenius link" → signupgenius_rsvp

Gotchas

• Reports require Pro. signupgenius_report_* only work with SIGNUPGENIUS_USER_KEY — session/fetchproxy users get a clear error pointing at the key.
• SSO accounts not supported. Session mode is direct email/password only — no Google/Apple/Facebook/Microsoft SSO, no 2FA. Use fetchproxy mode instead if your account uses SSO.
• Session listings collapse. In session mode the v3 signups/created endpoint returns active + expired in one paginated call — the three list_created_* tools all hit the same endpoint and filter client-side. Pro key mode has separate endpoints and exposes the real distinction.
• Write surface is small. Only signupgenius_add_group_member and signupgenius_rsvp mutate; everything else is read-only.
• ToS caveat. SignUpGenius's terms generally prohibit scripted/automated access. Personal-account, personal-scale use is the intended audience; running this against accounts you don't own or at scale is your problem.