Dynosend MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Dynosend MCP or direct API to manage contacts, update audiences, operate email campaigns, send transactional messages, and track customer events through natural language.

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Api Key

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

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
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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.

SETUP GUIDE

Connect Dynosend MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["dynosend"],
  mcp: true,
});
Create a session scoped to Dynosend and read its MCP URL and headers
3

Connect your agent to the MCP server

typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Add jane@example.com as a new Dynosend contact in my newsletter audience",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a Dynosend request
SETUP GUIDE

Connect Dynosend API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["dynosend"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Dynosend
3

Run Dynosend tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Add jane@example.com as a new Dynosend contact in my newsletter audience" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the Dynosend tool calls through the session, and print the final answer

Why Use Composio?

AI Native Dynosend Integration

  • Supports both Dynosend MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable contact, campaign, and event operations
  • Rich coverage for reading, writing, and querying your Dynosend audiences and marketing data

Managed Auth

  • Secure API key handling without hard-coding Dynosend credentials in your agent code
  • Central place to manage, scope, and revoke Dynosend access
  • Per user and per environment credentials for safer email marketing automation

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know which Dynosend action ran, when, and on whose behalf
  • Clear tool schemas help agents handle contacts, campaigns, messages, and events with fewer mistakes

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Dynosend
  • Scoped, least privilege access to Dynosend audiences, contacts, and campaign operations
  • Full audit trail of agent actions to support review and compliance

Rolling this out across your team?

Give your team centralized access control across every framework with Composio’s MCP Gateway.

EXPLORE MCP GATEWAY
FAQ

Frequently asked questions

Yes, Dynosend requires you to configure your own API key. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Dynosend connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Create the key in your Dynosend account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Dynosend actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Dynosend at any time.

When you connect a Dynosend account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Dynosend as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Dynosend. If Dynosend lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Dynosend at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Dynosend connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Dynosend rejects the old key. Create a new key in Dynosend and reconnect the account from the Composio dashboard or by asking your agent to reconnect Dynosend. Nothing else changes.

Composio's free plan includes 100,000 tool calls per month with no credit card, which covers most personal Dynosend use. Paid plans add higher limits and team features. Your Dynosend plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Dynosend accounts).

With Composio, you connect Dynosend once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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