Reply io MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Reply io MCP or direct API to automate sales outreach, track lead engagement, send follow-ups, and optimize pipeline activity through natural language.

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Api Key

Reply.io is an AI-powered sales engagement platform for automating sales outreach across multiple channels. Boosts lead conversion and sales productivity through integrated workflows.

33 Tools

Try Reply io now

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

TOOL ROUTER PLAYGROUND
Reply io
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TOOLS

Supported Tools

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

Add Contact to Sequence

Move an existing contact to a sequence in Reply.

Archive Sequence

Tool to archive a sequence.

Clear Contact Status

Tool to clear statuses from contacts.

Connect Exchange Account via OAuth

Tool to initiate OAuth connection for an Exchange email account.

Connect Gmail Account

Tool to initiate Gmail account connection via OAuth.

Create Contact

Tool to create a new contact in Reply.

Create Sequence Step

Tool to add a new step to an existing sequence.

Delete Contact

Tool to delete a contact.

Delete Email Account

Tool to delete a specific email account.

Delete Schedule

Tool to delete a schedule.

Delete Sequence

Tool to delete a sequence.

Delete User

Tool to delete a user.

Generate ULID

Generate ULID

Get Contact by ID

Tool to retrieve a contact by ID.

Get Contact Status

Tool to get contact status.

Get Current User

Tool to get the current authenticated user's ID.

Reply.io Get Disconnected Email Accounts

Tool to list email accounts that are currently disconnected due to authentication or connection errors.

Get Sequence By ID

Tool to retrieve detailed information about a sequence by its ID.

Get Sequence Contacts Extended

Tool to retrieve all contacts enrolled in a sequence with additional details.

Get Sequence Step by ID

Tool to retrieve details of a specific sequence step.

List Contacts Basic

Tool to list contacts.

Reply.io List Email Accounts

Tool to list all email accounts.

Reply.io List Lists

Tool to list all contact lists.

List Sequences

Tool to retrieve a paginated list of sequences.

List Sequence Steps

Tool to retrieve all steps in a sequence.

Pause Sequence

Tool to pause a running sequence.

Remove Contact From Sequence

Tool to remove a contact from a sequence.

Bulk Remove Contacts from Sequence

Tool to bulk remove multiple contacts from a sequence at once.

Search Contacts by Email

Tool to search contacts by email.

Set Contact Status

Tool to set the status of one or more contacts.

Start Sequence

Tool to start a sequence.

Update Contact

Tool to update an existing contact's information.

Update Email Account

Tool to update an existing email account with custom SMTP/IMAP settings.

SETUP GUIDE

Connect Reply io 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: ["reply_io"],
  mcp: true,
});
Create a session scoped to Reply io 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: "List all campaigns created this week",
  stopWhen: stepCountIs(10),
});

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

Connect Reply io 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: ["reply_io"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Reply io
3

Run Reply io tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "List all campaigns created this week" }],
});

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 Reply io tool calls through the session, and print the final answer

Why Use Composio?

AI Native Reply io Integration

  • Supports both Reply io MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for reading, writing, and querying your Reply io data

Managed Auth

  • Built-in OAuth handling with automatic token refresh and rotation
  • Central place to manage, scope, and revoke Reply io access
  • Per user and per environment credentials instead of hard-coded keys

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Reply io
  • Scoped, least privilege access to Reply io resources
  • 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, Reply io requires you to configure your own API key credentials. 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 Reply io 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 Reply io account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Reply io actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Reply io at any time.

When you connect a Reply io account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Reply io 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 Reply io. If Reply io 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 Reply io 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 Reply io 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 Reply io rejects the old key. Create a new key in Reply io and reconnect the account from the Composio dashboard or by asking your agent to reconnect Reply io. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Reply io use. Paid plans add higher limits and team features. Your Reply io 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 Reply io accounts).

With Composio, you connect Reply io 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.

Start with Reply io.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Reply io tool your agent needs.Free to start.

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