Plain MCP for AI Agents

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Plain MCP or direct API to triage support conversations, label and prioritize tickets, draft customer replies, and automate inbox workflows through natural language.

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Api Key

Plain is a collaborative support platform for B2B teams, focused on consolidating conversations and boosting efficiency with AI. Enjoy streamlined, modern workflows to assist customers across channels from one place.

22 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 Plain action and event your agent gets out of the box.

Add Customer To Group

Tool to add a customer to one or more customer groups.

Create Customer Group

Creates a new customer group in Plain for organizing and segmenting customers.

Create Thread

Tool to create a new thread.

Delete Customer

Tool to delete a customer from the system.

Delete User

Tool to delete a user from the system.

Fetch Company

Tool to fetch company details by ID.

Fetch Issues

Fetches external issue tracker links (Jira, Linear, GitHub, etc.

Fetch Tier

Tool to fetch a tier by its ID.

Get Customer By Email

Fetch customer details by email address.

Get Customer By ID

Tool to retrieve details of a specific customer by their unique ID.

Get Customers

Tool to fetch a list of customers.

Get Thread By ID

Fetches comprehensive details of a specific thread by ID, including customer info, status, priority, labels, and assignments.

Get User By ID

Fetch workspace user/team member by ID.

List Customer Groups

Tool to list all customer groups.

List Tiers

Tool to retrieve a list of tiers with pagination.

List Threads

Tool to retrieve a paginated list of threads.

Remove Customer From Group

Removes a customer from one or more customer groups in Plain.

Run GraphQL Query

Execute any GraphQL query or mutation against Plain API.

Send Message

Tool to send a new message within a thread.

Update Company

Upserts (creates or updates) a company in Plain.

Update Thread

Tool to update a thread's title.

Upsert Customer

Tool to upsert (create or update) a customer.

SETUP GUIDE

Connect Plain MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
Install the Composio SDK and Claude Agent SDK
2

Create Tool Router Session

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

const composio = new Composio({ apiKey: 'your-api-key' });

console.log("Creating Tool Router session...");
const { mcp } = await composio.create('your-user-id');
console.log(`Tool Router session created: ${mcp.url}`);
Initialize the Composio client and create a Tool Router session
3

Connect to AI Agent

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

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: mcp.url,
    headers: { 'x-api-key': 'your-composio-api-key' }
  }
});

const tools = await client.tools();

const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{ role: 'user', content: 'Fetch company details by company ID 12345' }],
  stopWhen: stepCountIs( 5 )
});

console.log(`Agent: ${text}`);
Use the MCP server with your AI agent
SETUP GUIDE

Connect Plain API Tool with your Agent

1

Install Composio

typescript
npm install @composio/openai
Install the Composio SDK
2

Initialize Composio and Create Tool Router Session

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

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
Import and initialize Composio client, then create a Tool Router session
3

Execute Plain Tools via Tool Router with Your Agent

typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Fetch all customer issues for Acme Corp'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
Get tools from Tool Router session and execute Plain actions with your Agent

Why Use Composio?

AI Native Plain Integration

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

Managed Auth

  • Built-in API key management with secure storage
  • Central place to manage, scope, and revoke Plain 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 Plain
  • Scoped, least privilege access to Plain resources
  • Full audit trail of agent actions to support review and compliance
FAQ

Frequently asked questions

Yes, Plain 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.

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. Learn more.

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

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

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