HubSpot MCP Server
Free tierHubSpot's official MCP server — gives agents read and write access to CRM records, contacts, and marketing objects.
MCPs
Resend's official MCP server — agents compose and send email through your Resend account.
Email is the highest-stakes channel to hand an agent, and this is the official, auditable way to do it: a thin open-source server over Resend's API, so you can read exactly what your agent can and can't do before granting it anything.
Run it locally against a test API key and have an agent draft and send you a plain-text digest of something it researched.
Items that share a category with this one.
HubSpot's official MCP server — gives agents read and write access to CRM records, contacts, and marketing objects.
Klaviyo's official MCP server — agents can inspect campaigns, segments, flows, and metrics in your account.
Official MCP server for DataForSEO's APIs — search results (SERP) data, keyword volume, backlinks, and on-page checks, available to any agent.