Roundup · 2 tools · Updated
The best MCPs for email marketing and CRM
Email and CRM data is personal data, so the controls matter as much as the features. Both Klaviyo and HubSpot publish official servers with write access; they differ in how you limit it.
Disclosure: the publisher of this site has commercial relationships with some of the companies whose products we rank. Read our full disclosure.
Our picks
Rank 1.Best for ecommerce email and SMS
Klaviyo MCP server
Klaviyo · Vendor-maintained
Campaign and flow reporting and campaign creation, with a one-switch read-only mode and protection against tools reading customer-written content.
- Reads data
- Yes
- Makes changes
- Yes
- Runs
- Hosted or local
- Cost
- No MCP fee / free to start
Rank 2.Best for an all-in-one HubSpot stack
HubSpot MCP server
HubSpot · Vendor-maintained
CRM records, campaigns, email drafts and analytics, plus CMS pages and blog posts, within each user’s permissions.
- Reads data
- Yes
- Makes changes
- Yes
- Runs
- Hosted
- Cost
- No MCP fee / free to start
Side by side
| Tool | Main use | Setup | Pricing model | Reads data | Makes changes |
|---|---|---|---|---|---|
| HubSpot MCP serverHubSpot | Main useCRM, campaigns, content and email analytics | SetupAn admin creates a connector first | PricingNo MCP fee / free to start | Reads dataYes (reads data) | Makes changesYes (makes changes) |
| Klaviyo MCP serverKlaviyo | Main useEmail and SMS reporting and campaign creation | SetupPaste a URL and sign in | PricingNo MCP fee / free to start | Reads dataYes (reads data) | Makes changesYes (makes changes) |
Each row is drawn from the maker’s documentation, linked on the tool’s profile. “Unconfirmed” means the sources we reviewed don’t settle it. “Limited” is explained on the profile. Evidence standards
How to choose
Use the read-only options first
Klaviyo lets you disable write tools in the URL. HubSpot respects each user’s permissions. Start with the narrowest access that answers your question.
Mind customer-written content
Replies, reviews and form fills can contain instructions aimed at AI. Klaviyo offers a switch to stop tools from reading them; elsewhere, review tool calls before approving.