Email marketing MCP servers for Claude, paired with competitor and AI answer data

Omnisend MCP

Omnisend's connector is for ecommerce email. The Agent Index lists seven tools: omnisend_query, omnisend_search, omnisend_create, omnisend_update, omnisend_delete, omnisend_reference and omnisend_tool_schema. Omnisend's help page says you need the Owner, Admin, Manager or Partner role, you choose read and write permissions per data area when you authorize, and the connection is tied to one store. The Agent Index tags it a community connector, not a partner one.

It fits responding to a competitor pricing or messaging change best. Claude reads Linkeddit's pricing signals, then asks Omnisend for a draft promotion or a segment of recent buyers, and you review it in Omnisend. In Venture Harbour's test, Omnisend's connector saved an eight-email abandoned-cart workflow as a disabled draft with a placeholder coupon code, which shows why the draft stays off until you check it. Prompt idea: "Read this week's high priority pricing signals from Linkeddit, then draft an Omnisend campaign for our 90 day buyers. Leave it as a draft."

OneSignal

OneSignal is mostly a push notification platform, and that is what its connector is built around. Its docs describe sending push, email, SMS and in-app messages, and list tools such as send_message, create_segment, list_templates, create_template and view_outcomes. The Agent Index lists 29 tools while OneSignal's own page says 43 across 11 categories, including email deliverability and email warmup, so check the live tool list in Claude. Sign-in is OAuth, with no API key.

If email is your only channel, the other connectors here fit better. It makes sense when your audience reads push or in-app messages. It fits the weekly digest best, as a draft: Claude reads Linkeddit's week of competitor moves, then writes the digest into a OneSignal template for review. OneSignal marks send_message as a high-impact action, so keep the prompt to create_template. Prompt idea: "Draft this week's competitor digest from Linkeddit as a OneSignal template. Do not call send_message."

Systeme.io

Systeme.io's connector covers a whole small-business stack, with 65 tools: contacts and tags, newsletters, campaigns, funnels, courses, price plans and automation rules. Its help center says it connects with an MCP key rather than OAuth, a key lasts at most 90 days, and you can have two at a time. Newsletters can be created as drafts, targeted by included and excluded tags, tested and sent, and the AI asks for confirmation before sending or deleting. It is a community connector in the Agent Index, and Systeme.io calls it an initial release.

It fits the weekly digest best. Claude reads Linkeddit's competitor moves, then uses create_newsletter and set_newsletter_included_tags to draft a newsletter for an internal tag, and you send it yourself. Systeme.io's help center says scheduling and activating campaign steps is not yet supported, so keep this to newsletters. Prompt idea: "Read this week's competitor signals from Linkeddit and create a Systeme.io newsletter draft for the team tag. Do not send it."

Inflection.io

Inflection is a B2B marketing automation platform, and its connector has 18 tools: list_platform_assets, get_platform_asset, create_platform_asset, update_platform_asset, preview_platform_asset, get_analytics_report, get_analytics_breakdown, get_contact_info and ask_agent among them. Its help page says journeys and sends are activated in the app, not through MCP, and that form authoring and webhook writes are not available. The Agent Index tags it a community connector.

It fits the weekly digest best, because the drafts-not-activation limit is a safe default. Claude reads Linkeddit's competitor moves and AI answer gaps, creates an email asset with create_platform_asset, and previews it with preview_platform_asset. You activate nothing until you read it. Prompt idea: "Read this week's competitor signals from Linkeddit, then create an Inflection email asset for the sales team and preview it. Do not activate anything."

Adobe Marketing Agent

Adobe Marketing Agent is for Claude Enterprise only, as far as the sources show. Adobe's registry entry describes it as "for Claude Enterprise", the Agent Index description says the same, and Martech Notes reports it entering beta across Claude Enterprise, ChatGPT Enterprise, Gemini Enterprise and IBM watsonx Orchestrate. Claude's marketplace page now carries the name Adobe CX Enterprise Coworker, and we found no listing for other Claude plans. Check with Adobe before you plan around it.

The Agent Index lists eight tools, mostly session settings such as core-set_sandbox, core-switch_org and core-set_dataview, and Adobe's registry lists approving or rejecting AI action plans. The audience and campaign work happens through Adobe's agent across Real-Time CDP, Journey Optimizer and Customer Journey Analytics. It fits the weekly digest best: Claude reads Linkeddit's competitor moves, then asks the Adobe agent how your own campaigns performed in the same weeks. Prompt idea: "Read last week's competitor signals from Linkeddit, then ask the Adobe agent for our campaign results for the same week and put both in one table."

Klaviyo

Klaviyo's connector lists 27 tools, 19 of them reads, including get_campaign_report, get_flow_report and query_metric_aggregates, plus create_campaign and create_email_template. It is the one to try first if your reporting already lives in Klaviyo.

Mailchimp

The Intuit Mailchimp connector lists 12 tools, such as campaign-planner, edit-campaign, get-campaign-content and save-to-mailchimp, and it plans and designs campaigns, then saves them to Mailchimp. Audienceful's roundup says the marketing connector has no sending, audience or reporting tools.

ActiveCampaign

ActiveCampaign's connector lists 32 tools, 18 reads and 14 writes, including list_campaigns, list_automations, add_tag_to_contact and add_contact_to_automation. In Venture Harbour's test it produced an account-aware sequence plan but could not build the automation itself.

Brevo

Brevo's Claude directory connector lists 21 tools and, per its listing, drafts email and SMS campaigns and templates but never sends, schedules or deletes. Audienceful's roundup describes a separate API-key server with 193 tools that can send, still in early access.

MailerLite

MailerLite's connector lists 45 tools, 21 of them reads, covering subscribers, groups, segments, campaigns, automations and forms, with create_campaign and schedule_campaign among the writes. Keep first prompts to reads and drafts.

Customer.io

Customer.io's connector lists eight tools, built around cio_read_api, cio_write_api and cio_delete_api, so reads, writes and deletes are approved separately, and its listing says writes and deletes support a dry-run preview. It is aimed at lifecycle teams.

beehiiv

beehiiv's connector lists 198 tools, 125 of them reads, across posts, automations, subscribers, podcasts and monetization, including get_post_stats, get_automation_stats and a get_crawler_analytics tool. It is the largest connector here and built for newsletter operators.

Resend

Resend's connector lists 85 tools, 38 reads and 45 writes, across emails, templates, broadcasts, contacts, domains and logs. It is a developer email API, so it suits alert emails from your own verified domain.