Groundbase CRM
Groundbase is a $9/mo flat-rate CRM built for solo technical founders. Unlike most CRM MCP servers that only let an AI client read records or draft messages, Groundbase's 86 tools can actually send SMS, send email, enroll contacts in cadences, and trigger workflows — using your own Twilio and Resend accounts (BYO, no markup). OAuth 2.1 and API-key auth supported.