Signupgenius MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 632 installs a week from npm. Last commit 18 Sep 2026.
SignUpGenius for Claude — sign-ups, slots, groups, and RSVPs. Free accounts or Pro API key.
Today is the operative word: we check Signupgenius MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add signupgenius-mcp -- npx -y signupgenius-mcp
{
"mcpServers": {
"signupgenius-mcp": {
"args": [
"-y",
"signupgenius-mcp"
],
"command": "npx"
}
}
}
[mcp_servers.signupgenius-mcp]
command = "npx"
args = ["-y", "signupgenius-mcp"]
{
"mcpServers": {
"signupgenius-mcp": {
"args": [
"-y",
"signupgenius-mcp"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"signupgenius-mcp": {
"args": [
"-y",
"signupgenius-mcp"
],
"command": "npx"
}
}
}
This one needs environment variables set before it will start:
SIGNUPGENIUS_EMAIL (SignUpGenius login email (recommended). Pair with SIGNUPGENIUS_PASSWORD for session mode — works on free accounts. No SSO/2FA.), SIGNUPGENIUS_PASSWORD (SignUpGenius password (recommended) — required iff SIGNUPGENIUS_EMAIL is set.), SIGNUPGENIUS_USER_KEY (SignUpGenius Pro API key (Pro Tools > API Management). Required only for slot REPORTS — Pro subscription needed.), SIGNUPGENIUS_NAME (Friendly account name used in startup logs.), SIGNUPGENIUS_BASE_URL (Override the default JSON API base (v2/k for key mode, v3 for session mode).), SIGNUPGENIUS_LEGACY_BASE_URL (Session mode only: override the host for legacy /SUGboxAPI.cfm calls. Defaults to https://www.signupgenius.com.), SIGNUPGENIUS_LOGIN_URL (Session mode only: override the login-form host. Defaults to https://www.signupgenius.com.), SIGNUPGENIUS_DISABLE_FETCHPROXY (Set to 1 to skip the fetchproxy browser-extension fallback (missing creds become a hard error — useful in headless CI).), SIGNUPGENIUS_SESSION_CACHE (Set to false to disable the on-disk session cache and re-authenticate on every process start. Defaults to enabled.), SIGNUPGENIUS_SESSION_FILE (Absolute path for the session cache file. Defaults to $MCP_DATA_DIR/.signupgenius-mcp/session.json.).
The author declared them in the registry entry; get the values from the project itself.
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