SignUpGenius volunteer signup sheets MCP server: create sign-up, add slots, list participants.
Streamable HTTP
https://cotlet.dev/mcp/v1/signupgenius/connectclaude mcp add --transport http signupgenius https://cotlet.dev/mcp/v1/signupgenius/connectStreamable HTTP
https://cotlet.dev/mcp/v1/signupgeniusclaude mcp add --transport http signupgenius https://cotlet.dev/mcp/v1/signupgeniusThis server publishes no installable package.