PopMCPCRM, email and SMS MCP stack for your AI
The deal pipeline and the four places a customer's contact record is quietly duplicated.
- HubSpot
- Klaviyo
- ActiveCampaign
- Mailchimp
- Postscript
app.popmcp.com/mcpThe 5 connections
Most teams do not have a customer database. They have five, and each one was the right answer at the time nobody had the appetite to consolidate.
- HubSpotAPI credentialListsBlog postsCampaignsMarketing emails1,051tools24triggers
- KlaviyoAPI credentialCatalogsProfilesCampaignsTags308tools20triggers
- ActiveCampaignAPI credentialDealsContactsAccountsE-commerce214tools23triggers
- MailchimpAPI credentialListsE-commerceCampaignsReports290tools24triggers
- PostscriptAPI credentialWebhooksSubscribersComplianceKeywords18tools7triggers
Across the stack777 read and 1,104 write operations, 174 API modules1,881tools98triggers
One question, every connection
The tool names below are the real ones your client calls. Check any chain against the catalog on the integration’s own page.
One person — every list they are on, everywhere.
- HubSpot
hubspot_contacts_search - Klaviyo
klaviyo_get_profilesklaviyo_get_lists_for_profile - ActiveCampaign
activecampaign_list_contactsactivecampaign_list_tags_for_contact - Mailchimp
mailchimp_get_search_members - Postscript
postscript_get_subscriber
Five subscriber databases answering the same question at once — the check nobody does by hand before a send, and the one that catches a double message.
Segment once, then apply it everywhere we send from.
- Klaviyo
klaviyo_get_segmentsklaviyo_get_profiles_for_segment - Mailchimp
mailchimp_get_listsmailchimp_post_list_member_tags - Postscript
postscript_get_subscriberspostscript_update_subscriber
The segment is defined in the tool that knows the purchase history, then carried into the tools that will do the sending.
Which campaigns are actually producing deals?
- Mailchimp
mailchimp_get_campaignsmailchimp_get_reports - HubSpot
hubspot_contacts_searchhubspot_deals_search - ActiveCampaign
activecampaign_list_dealsactivecampaign_list_deal_groups
Open and click reports joined to the pipeline they were supposed to feed, across both CRMs, without exporting either.
Turning it on
Nothing to deploy, and nothing to install on the provider side.
- Connect the accounts
One connection per store, property or ad account. Each takes an API credential off one settings screen. Credentials are encrypted at rest and never reach your AI client.
- Tick what each client reaches
Your client signs in to PopMCP with OAuth and gets only the connections you approve. Writes run the moment it calls them, so keep reporting teammates on read-only.
- Register one URL
app.popmcp.com/mcp, once per client. Claude, ChatGPT, Codex and the rest reach the same five connections with the same permissions.
Five connections need Starter or above — the free tier holds two. See what each plan includes.
The other stacks
Same endpoint, same controls. Most teams end up running two or three of them side by side.
Questions about the CRM, email and SMS stack
Will this merge or deduplicate my contacts?
No, and it deliberately does not try. It reads all five and tells you where the same person appears, what tags and lists they carry in each, and where they have opted out. What you do about it stays a decision, made with the write tools of whichever platform should own the record.
Can it send a campaign?
It can create and update campaigns, tag members, add profiles to lists and send SMS messages, because those write tools are in the catalogs. A send is irreversible the moment the AI calls it, so this is a stack to keep on read-only for anyone who is only reporting.
What about opt-outs and consent?
Postscript exposes opt-out and data redaction tools and Klaviyo carries a data privacy module, so a request can be honoured across the stack in one pass. Consent still belongs to you: PopMCP is the access layer, not the compliance record, and the provider's own rules apply exactly as they do in its dashboard.
Connect the CRM, email and SMS stack to your AI
Add HubSpot, Klaviyo, ActiveCampaign and the rest with credentials you already own, and get one secure MCP URL for all of them.