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Updated 2026-10-18

Best Email Marketing Tools for Manus and Cue

Connect a real email platform to your Manus agents, so they work from your audience and results instead of a blank page.

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Manus launched Manus 2.0 and Cue on September 28, 2026. Cue is a standalone app for personal agents built on the same infrastructure as Manus, and Manus says each Cue agent can have its own email address, phone number, wallet, and computer. That makes email marketing a natural thing to hand over, and also an easy thing to get wrong. An agent's own mailbox is not an email marketing platform. Newsletters and sequences need consent, unsubscribes, and suppression lists, which come from a platform you connect through Manus connectors. We compared 10 platforms by how well they plug into Manus: MCP by URL, built-in connectors, custom API keys, and how they behave inside scheduled tasks and automations.

TL;DR

Sequenzy is the most complete option to add as a Manus custom MCP connector: one URL gives agents campaigns, sequences, segments, templates, transactional email, and analytics. HubSpot is the easiest install because it is a built-in Manus connector, though it is CRM-first. Klaviyo, Kit, Loops, and Customer.io all publish hosted MCP servers you can add by URL. Manus has not documented connectors for Cue itself, so set connections up in Manus and confirm what your Cue agents can use. Never turn on Skip confirmations for tasks that send email.

Why Manus Agents Need an Email Platform

Agents are good at recurring work

Scheduled tasks and automations make Manus suited to weekly reports, list hygiene, and follow-up checks, if it can reach live data.

Copy without data is guesswork

An agent that can see which emails converted, who is inactive, and which sequences stall writes better briefs than one working from a prompt.

Consent lives in the platform

Unsubscribes, suppression lists, and sending domains are managed by your email platform. Routing marketing through it keeps you compliant even when an agent does the work.

Drafts give you a checkpoint

Platforms with draft campaigns let an agent finish the work and stop, so you review the real email, audience, and schedule before anything goes out.

Important Tips Before You Choose

Lessons from manus and cue users who've been doing this for years. Save yourself the trial and error.

Add platforms with Add MCP by URL

In Manus, Connectors, Create, and Add MCP by URL takes a server name and a URL. Hosted MCP servers work this way. Servers that only run on your own computer do not, because Manus agents run in the cloud.

Keep confirmations on for sends

Scheduled Tasks 2.0 has a Skip confirmations option for trusted workflows. It is fine for a weekly report. It is not fine for anything that sends a campaign, activates a sequence, or changes subscribers.

Use a Project for email work

Manus Projects share connectors, skills, and context across tasks. Put your email platform connector, brand notes, and approval rules in one Project so every email task starts with the same setup.

Watch credit use on recurring tasks

Manus bills in credits. A daily task that pulls full campaign reports burns more than a weekly one that asks for a summary. Start weekly and tighten the prompt before increasing frequency.

Write a skill for your email rules

Manus skills are reusable instructions with optional scripts. A short skill with your sender, tone, frequency limits, and review steps keeps every agent consistent.

10 Best Email Marketing Tools for Manus and Cue Users

#ToolDescriptionBest ForPricing
1SequenzyHosted MCP server covering campaigns, sequences, segments, templates, transactional email, and analytics.Manus users who want one connector for every email taskFree up to 2,500 emails monthly; paid plans scale with volume, contacts unlimited
2HubSpotCRM and marketing suite available as a built-in Manus connector.B2B teams whose email decisions depend on CRM dataFree CRM tools; marketing features need a paid Hub
3KlaviyoCommerce-focused email and SMS, connectable to Manus by MCP URL.Shopify and ecommerce brandsBills by profiles; SMS credits sold separately
4KitCreator email platform with a hosted MCP server.Creators and newsletter writersFree newsletter plan; paid plans by list size
5LoopsSaaS email platform with a hosted MCP server.Small SaaS teamsFree to start; contact count sets the paid tier
6Customer.ioLifecycle messaging driven by product events, with US and EU MCP endpoints.SaaS teams with mature Customer.io journeysNo free plan; price rises with profiles and message volume
7BrevoInexpensive email, SMS, and CRM, with an MCP server that takes a token.Very small teams watching every dollarFree tier capped per day; paid tiers by emails sent
8ActiveCampaignAutomation-first marketing platform with a vendor MCP server.Small businesses using ActiveCampaign automationsPlans priced by contacts; MCP on the main paid tiers
9ResendDeveloper-first sending service with an MCP endpoint for agents.Developers building apps with ManusFree quota each month; volume-based paid plans
10MailchimpFamiliar small-business newsletter tool, reachable only through its API.Existing Mailchimp users who need reportsSmall free plan; paid plans by audience size
Our Top Pick for Manus and Cue Users
#1
Sequenzy

Hosted MCP server covering campaigns, sequences, segments, templates, transactional email, and analytics.

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Sequenzy dashboard screenshot

Sequenzy suits Manus because one connector covers the whole email program. Add it with Add MCP by URL using https://api.sequenzy.com/v1/mcp, and a Manus agent can list campaigns and sequences, read results, build segments, create draft campaigns and templates, and send transactional email. The server signs in with OAuth and also accepts a Sequenzy API key as an Authorization Bearer header, which covers either way Manus handles authentication for your account. Put the connector in a Project with an email skill and a weekly scheduled report, and you have a steady loop of results, recommendations, and drafts for review. The tradeoffs: it is a custom connector, not a built-in Manus one, and Sequenzy's integration ecosystem is smaller than older suites.

Best for
Manus users who want one connector for every email task
Pricing
Free up to 2,500 emails monthly; paid plans scale with volume, contacts unlimited

Pros

  • One hosted MCP connector for the full program
  • OAuth or Bearer key, whichever your Manus setup uses
  • Draft states for review before sends
  • Marketing and transactional email together

Cons

  • Custom connector, not built in
  • Smaller integration ecosystem
  • Cue support depends on Manus, not Sequenzy
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#2
HubSpot

CRM and marketing suite available as a built-in Manus connector.

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HubSpot dashboard screenshot

HubSpot is one of Manus's built-in connectors, so connecting it is a sign-in rather than a setup task. B2B teams can have an agent research accounts, update contact records, and pull deal context before deciding who should get an email. The limits are on the email side: HubSpot's agent access is centered on CRM data, and marketing email is still built in HubSpot itself. Use it with Manus to decide who to email and why, then build the email in HubSpot or a dedicated platform.

Best for
B2B teams whose email decisions depend on CRM data
Pricing
Free CRM tools; marketing features need a paid Hub

Pros

  • Built-in Manus connector
  • Rich contact, company, and deal data
  • OAuth sign-in

Cons

  • Marketing email built in HubSpot
  • CRM-first rather than email-first
  • Steep pricing by tier
See Full Comparison
#3
Klaviyo

Commerce-focused email and SMS, connectable to Manus by MCP URL.

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Klaviyo dashboard screenshot

Klaviyo's hosted MCP server at https://mcp.klaviyo.com/mcp signs in with OAuth and can be added to Manus by URL. Pair it with Manus's built-in Shopify connector and an agent can look at orders, products, and Klaviyo segments together, which is useful for planning promotions or win-back campaigns. Only Klaviyo Owners, Admins, and Managers can connect it. Start in read-only mode and let the agent prepare campaigns and templates as drafts for a marketer to finish.

Best for
Shopify and ecommerce brands
Pricing
Bills by profiles; SMS credits sold separately

Pros

  • Hosted MCP with OAuth
  • Works well alongside Manus's Shopify connector
  • Read-only mode for first runs

Cons

  • Role restrictions on who can connect
  • Built for ecommerce
  • Costs rise with profiles
See Full Comparison
#4
Kit

Creator email platform with a hosted MCP server.

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Kit's MCP endpoint, https://app.kit.com/mcp, signs in with OAuth and asks for approval on write actions, which pairs well with Manus's review-first habits. Creators can have a Manus agent tag subscribers, summarize growth, and draft broadcasts based on what readers clicked. A weekly scheduled task that reports new subscribers by source and the best-performing broadcast is a good first use. Kit is less suited to product lifecycle email for software companies.

Best for
Creators and newsletter writers
Pricing
Free newsletter plan; paid plans by list size

Pros

  • Hosted MCP with OAuth
  • Write actions require approval
  • Simple creator data model

Cons

  • Limited lifecycle automation for SaaS
  • Fewer analytics than larger suites
  • Custom connector setup
#5
Loops

SaaS email platform with a hosted MCP server.

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Loops dashboard screenshot

With Loops' MCP endpoint at https://mcp.loops.so (OAuth sign-in), a Manus agent can work with contacts, events, and email activity after an Add MCP by URL setup. It fits small SaaS teams who keep their journeys simple. Loops are built in its visual editor, so check what the MCP server can change before asking an agent to restructure onboarding.

Best for
Small SaaS teams
Pricing
Free to start; contact count sets the paid tier

Pros

  • Hosted MCP with OAuth
  • Simple product
  • Marketing and transactional email together

Cons

  • Journey editing coverage needs checking
  • Basic segmentation
  • Smaller feature set
See Full Comparison
#6
Customer.io

Lifecycle messaging driven by product events, with US and EU MCP endpoints.

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Customer.io dashboard screenshot

Customer.io offers MCP endpoints in the US and EU, both signing in with OAuth, and a workspace admin has to enable it first. Its tools support dry-run previews for changes, which is a useful safety net when a Manus task proposes edits to segments or campaigns. Product teams with established journeys get a capable assistant for analysis and drafts. Budget for it accordingly.

Best for
SaaS teams with mature Customer.io journeys
Pricing
No free plan; price rises with profiles and message volume

Pros

  • OAuth on both regional endpoints
  • Dry-run previews for changes
  • EU endpoint available

Cons

  • Admin must enable MCP
  • Expensive at scale
  • Complex journeys need human design
#7
Brevo

Inexpensive email, SMS, and CRM, with an MCP server that takes a token.

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Brevo dashboard screenshot

Brevo's hosted MCP server exposes a large part of its API and authenticates with an MCP key sent as a Bearer token. If your Manus setup lets you add a header to a custom MCP connector, it works; otherwise use Manus's Custom API option with the key stored as a secret. The key grants full account access, so it suits small teams who accept that tradeoff for a low price.

Best for
Very small teams watching every dollar
Pricing
Free tier capped per day; paid tiers by emails sent

Pros

  • Broad API coverage through MCP
  • Low cost
  • Email, SMS, and CRM together

Cons

  • No OAuth; full-access key
  • Large tool list
  • Lighter lifecycle features
See Full Comparison
#8
ActiveCampaign

Automation-first marketing platform with a vendor MCP server.

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ActiveCampaign dashboard screenshot

ActiveCampaign's official hosted MCP server is available on its main plans, and the URL is in its developer settings. Added to Manus, it lets an agent work with campaigns, automations, and contact records. The tool set is compact, so plan for some dashboard work, and keep automation triggers behind confirmation because they can reach many contacts at once.

Best for
Small businesses using ActiveCampaign automations
Pricing
Plans priced by contacts; MCP on the main paid tiers

Pros

  • MCP maintained by the vendor
  • Deep automation options
  • Built-in CRM

Cons

  • Compact tool set
  • Automation triggers need care
  • Price grows with contacts
See Full Comparison
#9
Resend

Developer-first sending service with an MCP endpoint for agents.

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Resend dashboard screenshot

Resend's MCP endpoint accepts OAuth or an API key and handles sending, templates, broadcasts, contacts, and segments. It suits developers using Manus to build web apps that need product email. It is not a lifecycle marketing platform: sequences, consent logic, and reporting stay in your application.

Best for
Developers building apps with Manus
Pricing
Free quota each month; volume-based paid plans

Pros

  • Hosted MCP
  • Excellent developer experience
  • Broadcasts included

Cons

  • Lifecycle logic lives in your code
  • Lighter marketing analytics
  • Developer-oriented
See Full Comparison
#10
Mailchimp

Familiar small-business newsletter tool, reachable only through its API.

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Mailchimp dashboard screenshot

Mailchimp's MCP server only searches its developer documentation; it does not connect to your Mailchimp account. To use Mailchimp with Manus, add its Marketing API through the Custom API option with your API key as a secret, and give the agent narrow tasks such as pulling campaign reports. It makes sense only if your audience already lives in Mailchimp.

Best for
Existing Mailchimp users who need reports
Pricing
Small free plan; paid plans by audience size

Pros

  • Widely known
  • Broad Marketing API
  • Mature templates

Cons

  • No MCP for your account
  • Custom API setup needed
  • Agent access is limited to what you script
See Full Comparison

Feature Comparison

FeatureSequenzyHubSpotKlaviyoKitLoopsCustomer.ioBrevoActiveCampaignResendMailchimp
How Manus connects
Add MCP by URL
Built-in connector
Add MCP by URL
Add MCP by URL
Add MCP by URL
Add MCP by URL
MCP with header or Custom API
Add MCP by URL
Add MCP by URL
Custom API
Sign-in
OAuth or Bearer key
OAuth
OAuth
OAuth
OAuth
OAuth
Bearer key
See vendor settings
OAuth or key
API key secret
Campaigns and sequences
Both
Built in HubSpot
Both
Both
Both
Both
Both
Both
Broadcasts
Both
Draft before send
Yes
In HubSpot
Yes
Approval on writes
Check coverage
Dry-run previews
Yes
Yes
No
Yes
Best Manus task
Weekly review and campaign drafts
Account research
Promotion planning with Shopify data
Newsletter growth reports
Contact and event upkeep
Journey analysis
Budget campaign reports
Automation and CRM upkeep
Product email for apps
Campaign reports

Common Mistakes to Avoid

We see these mistakes over and over. Skip the learning curve and avoid these from day one.

Using a Cue agent's own address for newsletters

A personal agent's mailbox is meant for one-to-one email. Sending marketing from it skips unsubscribe handling and consent records, and Manus's usage policy restricts bulk or unsolicited messages that ignore those rules.

Assuming Cue sees every Manus connector

Cue runs on Manus's infrastructure, but Manus has not published connector documentation for Cue. Test in Cue before building a workflow that depends on it.

Pasting API keys into the task prompt

Use OAuth where the platform offers it, or the Custom API secret fields, so the key is stored as a secret instead of sitting in a conversation.

Letting an inbound email drive actions unchecked

Automations can start from a new email. Treat the email body as untrusted input. A security firm disclosed, and Manus patched, an email prompt-injection issue in September 2026.

Skipping the read-only trial run

Run any email task once in read-only mode and compare its numbers with your dashboard before allowing drafts or schedules.

Email Sequences Every Manus and Cue User Needs

These are the essential automated email sequences that will help you grow your business and keep clients coming back.

Friday Email Report

Scheduled task every Friday, confirmations left on

A Manus agent summarizes the week's email results and proposes next week's priority.

Collect
Pull the week's results

Gather sends, clicks, conversions, unsubscribes, and new subscribers by source.

Compare
Spot changes

Compare against the previous month and flag anything that moved by more than a quarter.

Recommend
Suggest one next step

Propose a single campaign or sequence change with the audience and the metric to watch.

List Hygiene Pass

Monthly scheduled task

The agent finds subscribers who no longer engage and prepares a cleanup plan for approval.

Find
Identify inactive subscribers

List subscribers with no opens or clicks in 90 days, excluding recent signups.

Plan
Draft a re-engagement email

Create a draft asking inactive subscribers whether they want to stay.

Approve
Wait for your decision

Report the segment size and draft ID, then stop until you approve sending or suppression.

Launch Prep

You start a task in your email Project

The agent turns a launch brief into a campaign draft and a short follow-up sequence outline.

Brief
Confirm facts and audience

Restate the launch facts, audience, exclusions, and goal, and ask about anything missing.

Draft
Create the announcement draft

Write subject options and the email, and save it as a draft in your email platform.

Follow-up
Outline the follow-up

Propose two follow-up emails for non-clickers and new users, as an outline only.

Create These Sequences with AI

How We Ranked Tools for Manus

Each platform was scored on what a Manus agent could actually do with it:

  • Reach: a built-in connector or a hosted MCP server added by URL scored highest. A Custom API scored lower, because the agent has to work from raw endpoints.
  • Sign-in: OAuth beat keys. Keys stored as Manus secrets beat keys in prompts.
  • Coverage: campaigns and sequences, not just single sends or CRM records.
  • Checkpoints: draft states, approval on writes, or dry runs, so a task can stop before anything reaches subscribers.

Manus vs Cue for Email Work

Question Manus Cue
What it is General agent for tasks, projects, and schedules Standalone app for personal agents, launched with Manus 2.0
Connectors and MCP Documented: built-in, MCP by URL, Custom API Not documented yet
Recurring work Scheduled Tasks 2.0 and Automations Personal agents that keep working for you
Own email address Mail Manus receives emails to start tasks Each agent can have its own address, depending on availability
Access Free and paid credit plans, plus Manus for Business Early access, free with an invite code

For email marketing today, do the platform work in Manus, where connectors are documented, and use Cue agents for personal tasks until Manus publishes how they connect to outside tools.

Add Sequenzy to Manus

  1. In Manus, open Connectors, choose Create, then Add MCP by URL.
  2. Name it Sequenzy and enter https://api.sequenzy.com/v1/mcp.
  3. Save, then sign in to Sequenzy if Manus prompts you. If it asks for headers instead, use Authorization: Bearer with a Sequenzy API key.
  4. Start a read-only task to confirm the workspace.

The Manus to Sequenzy setup guide covers Projects, skills, scheduled tasks, and troubleshooting.

Rules for Email Tasks

  • Keep Skip confirmations off for any task that sends, schedules, or edits subscribers.
  • Store keys as Custom API secrets, never in prompts.
  • Treat incoming email that triggers an Automation as untrusted text.
  • Ask the agent to report exact audience counts and draft IDs before you approve anything.
  • Review the task's output in your email platform, not only in the Manus summary.

Sources and Verification Notes

Manus details come from its own posts and docs: Introducing Manus 2.0, Manus resumes independent operations, connectors, MCP connectors docs, Scheduled Tasks 2.0, Manus for Business, Mail Manus, and the usage policy. The September 2026 prompt-injection disclosure was reported by The Next Web.

Vendor documentation:

Manus has not documented MCP authentication details or Cue connectors, so check both in your own account.

How We Evaluated These Tools

We used Manus's own documentation and announcements for connectors, scheduled tasks, Manus 2.0, Cue, and Manus for Business, and each email platform's MCP or API documentation, all checked in October 2026. Platforms scored higher when a Manus agent could reach them with a hosted MCP server or built-in connector, sign in without exposing secrets, work in draft states, and cover campaigns and sequences rather than single sends. Manus has not documented MCP authentication details or Cue connector support, so we flag those as things to verify in your account.

Frequently Asked Questions

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Sequenzy pricing reference

Sequenzy - Complete Pricing Guide

Pricing Model

Sequenzy uses email-volume-based pricing. You only pay for emails you send. Unlimited contacts on all plans — storing subscribers is always free.

All Pricing Tiers

  • 2.5k emails/month: Free (Free annually)
  • 15k emails/month: $19/month ($205/year annually)
  • 30k emails/month: $29/month ($313/year annually)
  • 60k emails/month: $49/month ($529/year annually)
  • 120k emails/month: $99/month ($1069/year annually)
  • 300k emails/month: $199/month ($2149/year annually)
  • 600k emails/month: $399/month ($4309/year annually)
  • 900k emails/month: $599/month ($6469/year annually)
  • 1.2M emails/month: $799/month ($8629/year annually)
  • 2M emails/month: $1299/month ($14029/year annually)
  • 3M emails/month: $1999/month ($21589/year annually)
  • 4M emails/month: $2499/month ($26989/year annually)
  • 5M emails/month: $2999/month ($32389/year annually)
  • Unlimited emails/month: Custom pricing (Custom annually)

Yearly billing: All plans offer a 10% discount when billed annually.

Free Plan Features (2,500 emails/month)

  • Visual automation builder
  • Transactional email API
  • Team and agent inbox
  • Landing pages
  • Unlimited team members
  • Goal tracking & revenue attribution
  • Unlimited lists and segments
  • Payment integrations
  • API, MCP, and CLI access
  • Unlimited sending domains
  • Deliverability monitoring
  • Send time optimization
  • A/B testing

Paid Plan Features (15k - 5M emails/month)

  • Visual automation builder
  • Transactional email API
  • Team and agent inbox
  • Landing pages (Create hosted signup pages and attach a custom domain.)
  • Unlimited team members
  • Goal tracking & revenue attribution
  • Unlimited lists and segments
  • Payment integrations (Stripe, Paddle, Lemon Squeezy)
  • API, MCP, and CLI access
  • Unlimited sending domains
  • Deliverability monitoring
  • Send time optimization
  • A/B testing

Enterprise Plan Features (Unlimited emails)

  • Visual automation builder
  • Transactional email API
  • Team and agent inbox
  • Landing pages
  • Unlimited team members
  • Goal tracking & revenue attribution
  • Unlimited lists and segments
  • Payment integrations
  • API, MCP, and CLI access
  • Unlimited sending domains
  • Deliverability monitoring
  • Send time optimization
  • A/B testing

Important Pricing Notes

  • You only pay for emails you send — unlimited contacts on all plans
  • No hidden fees - all features included in the price
  • No credit card required for free tier

Contact

  • Pricing Page: https://sequenzy.com/pricing
  • Sales: hello@sequenzy.com