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How to connect Dynosend to Claude

Connect Claude Web, Desktop and Cowork to Dynosend MCP. Add contact to newsletter audience, summarize latest campaign engagement metrics, and more using natural language, with authentication handled for you.

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Dynosend is an email marketing platform for audiences, contacts, campaigns, transactional messages, and customer events. Use it to manage lifecycle email, track engagement, and keep customer communication organized.

18 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Dynosend account to Claude via Composio Connect, enabling it to add contact to newsletter audience, summarize latest campaign engagement metrics, track signup event for customer, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Dynosend with

ChatGPTHermesAtomic Agent

Connecting Dynosend to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Dynosend account

Back in Claude, ask it to connect to Dynosend or give it any Dynosend-related task.

For example, ask Claude to:

  • "Add contact to newsletter audience"
  • "Summarize latest campaign engagement metrics"
  • "Track signup event for customer"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Dynosend account is ready to use.

What is the Dynosend Claude Connector, and what's possible with it?

The Dynosend MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Dynosend account. It provides structured and secure access so your agent can perform Dynosend operations on your behalf.

Troubleshooting

1. Why does Claude not use the Composio connector for Dynosend?

The connector can show as connected, but Claude must use it in each Dynosend conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Dynosend again.

2. Why does Claude show an MCP server error before Dynosend connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Dynosend.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Dynosend.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Dynosend authorization link not work?

The Composio connector is one server. Your Dynosend account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Dynosend connection.
  • Composio creates a fresh Dynosend authorization link.
  • Open that link in your browser and finish the Dynosend sign-in.

4. Why do Dynosend actions fail after they worked before?

The Dynosend connection can expire or lose permission.

  • Ask Claude to inspect the Dynosend connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Dynosend account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Dynosend.
  • If the action still fails with a permission error, check that the connected account has that permission in Dynosend itself.

5. How do I switch to a different Dynosend account?

Claude can manage the Dynosend connection for you.

  • Ask Claude to disconnect or delete the current Dynosend account.
  • Ask Claude to connect Dynosend again.
  • Open the new Composio authorization link for Dynosend.
  • Sign in with the other Dynosend account in the browser.
  • After the account connects, ask Claude to retry the Dynosend task.

6. Why is my Dynosend connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Dynosend connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Dynosend tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Dynosend.
TOOLS

Supported Tools

Every Dynosend action and event your agent gets out of the box.

Add Email To Blacklist

Permanently add an email address to the Dynosend blacklist.

Add Tags To Contact

Append one or more tags to a contact without replacing its existing tags.

Check Blacklist

Check whether an email address is on the connected Dynosend account's blacklist and return its timestamp and reason when available.

Create Contact

Create a contact in an audience, optionally assigning tags and audience-defined custom fields.

Delete Contact

Permanently delete one contact from an audience for GDPR/CCPA erasure.

Find Duplicate Contacts

Find contacts that use the same email address across all audiences in the connected Dynosend account.

Get Audience

Get one audience's configuration, custom-field definitions, contact information, and subscription statistics by audience UID.

Get Campaign

Get one campaign's configuration and delivery, open, click, spam, bounce, and unsubscribe insights.

Get Contact

Get one contact in an audience by contact UID or email address.

List Audiences

List audiences available to the connected Dynosend account, including the UID needed by audience and contact tools.

List Campaigns

List campaigns in the connected Dynosend account, including status and the campaign UID used by campaign tools.

List Contacts

Return one page of contacts in a Dynosend audience, including contact UIDs, subscription status, tags, and audience-defined custom-field values.

Record Contact Event

Record an application event for a contact in an audience.

Send Transactional Message

Send a configured Dynosend transactional message.

Set Campaign Delivery State

Pause a sending campaign or resume a paused campaign by setting its delivery state to paused or sending.

Set Contact Subscription Status

Set a contact's subscription status to subscribed or unsubscribed in an audience.

Start Campaign

Start a ready broadcast campaign.

Update Contact

Update a contact's email, replace its complete tag set, or set audience-defined custom fields.

FRAMEWORKS

How to build Dynosend MCP Agent with another framework

ChatGPT logo

ChatGPT

Use Dynosend MCP with ChatGPT

Hermes logo

Hermes

Use Dynosend MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Dynosend MCP with Atomic Agent

FAQ

Frequently asked questions

With a standalone Dynosend MCP server, the agents and LLMs can only access a fixed set of Dynosend tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Dynosend and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Dynosend tools.

Yes, absolutely. You can configure which Dynosend scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Dynosend data and credentials are handled as safely as possible.

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