AI Native Slack Integration
- Supports both Slack MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable tool execution
- Rich coverage for reading, writing, and querying your Slack data
- UseBuildFeaturesTRIGGERSStart background agents from events across your connected appsFIREWALLNEWBlocks instructions hidden in tool results before your agent reads themINSTANTNEWAudio, video, search, browser and data tools, with no keys to manageOPTIMIZATIONLower cost per completed task with optimised tools and skills
- DOCS
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.SIGN UP
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.LOG IN
Slack MCP Server for Claude and Cursor
Hosted Slack MCP for Claude, Cursor, and ChatGPT. Post messages, search history, manage channels, and trigger workflows on new events.
Oauth2
Slack is a channel-based messaging platform for teams and organizations. It helps people collaborate in real time, share files, and connect all their tools in one place.
165 Tools9 Triggers
Try Slack now
Type what you want done — sign in and watch it run live in the Tool Router playground.
TOOL ROUTER PLAYGROUND
Slack
Enter ↵
Try asking
TOOLS & TRIGGERS
Supported Tools and Triggers
Every Slack action and event your agent gets out of the box.
SETUP GUIDE
Connect Slack MCP Tool with your Agent
1
Install Composio
typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openaiInstall 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: ["slack"],
mcp: true,
});Create a session scoped to Slack 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: "Send reminder to sales channel tomorrow",
stopWhen: stepCountIs(10),
});
console.log(text);
await client.close();Pass the session's MCP URL and headers to your agent and run a Slack request
SETUP GUIDE
Connect Slack API Tool with your Agent
1
Install Composio
typescript
npm install @composio/core @composio/openai openaiInstall 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: ["slack"] });
const tools = await session.tools();Initialize Composio with the OpenAI Responses provider and create a session scoped to Slack
3
Run Slack tools with your agent
typescript
let response = await client.responses.create({
model: "gpt-5.6-sol",
tools,
input: [{ role: "user", content: "Send reminder to sales channel tomorrow" }],
});
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 Slack tool calls through the session, and print the final answer
Guide
Read the guideConnect multiple Slack accounts to Claude and tell it which one to use by name.
Why Use Composio?
Managed Auth
- Built-in OAuth handling with automatic token refresh and rotation
- Central place to manage, scope, and revoke Slack 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 Slack
- Scoped, least privilege access to Slack resources
- Full audit trail of agent actions to support review and compliance
FRAMEWORKS
Use Slack with any AI Agent Framework
Choose a Framework you want to connect Slack with
Claude Code
Use Slack MCP with Claude Code
Cursor
Use Slack MCP with Cursor
ChatGPT
Use Slack MCP with ChatGPT
Claude Cowork
Use Slack MCP with Claude Cowork
Antigravity
Use Slack MCP with Antigravity
OpenAI Agents SDK
Use Slack MCP with OpenAI Agents SDK
Claude Agents SDK
Use Slack MCP with Claude Agents SDK
Grok Bot
Use Slack MCP with Grok Bot
Muse
Use Slack MCP with Muse
Codex
Use Slack MCP with Codex
Kimi Code
Use Slack MCP with Kimi Code
Grok Build
Use Slack MCP with Grok Build
VS Code
Use Slack MCP with VS Code
OpenCode
Use Slack MCP with OpenCode
OpenClaw
Use Slack MCP with OpenClaw
Hermes
Use Slack MCP with Hermes
Atomic Agent
Use Slack MCP with Atomic Agent
Pi
Use Slack MCP with Pi
DeepSeek Harness
Use Slack MCP with DeepSeek Harness
CLI
Use Slack MCP with CLI
Google ADK
Use Slack MCP with Google ADK
Langchain
Use Slack MCP with Langchain
AI SDK
Use Slack MCP with AI SDK
Mastra AI
Use Slack MCP with Mastra AI
LlamaIndex
Use Slack MCP with LlamaIndex
CrewAI
Use Slack MCP with CrewAI
Pydantic AI
Use Slack MCP with Pydantic AI
Autogen
Use Slack MCP with Autogen
Rolling this out across your team?
Give your team centralized access control across every framework with Composio’s MCP Gateway.
EXPLORE MCP GATEWAYMORE TOOLKITS
Explore Other Toolkits
Gmail
Oauth2
Gmail is Google's email service with powerful spam protection, search, and G Suite integration. It keeps your inbox organized and makes communication fast and reliable.
Outlook
Oauth2S2s Oauth2
Outlook is Microsoft's email and calendaring platform for unified communications and scheduling. It helps users stay organized with powerful email, contacts, and calendar management.
Gong
BasicOauth2
Gong is a platform for video meetings, call recording, and team collaboration. It helps teams capture conversations, analyze calls, and turn insights into action.
Microsoft teams
Oauth2S2s Oauth2
Microsoft Teams is a collaboration platform that combines chat, meetings, and file sharing within Microsoft 365. It keeps distributed teams connected and productive through seamless virtual communication.
FAQ
Frequently asked questions
No. Composio provides a managed OAuth app for Slack, so you sign in with your normal Slack account and approve access. If you later want the consent screen to show your own company name, you can add your own Slack OAuth app in the Composio dashboard, and every connection after that uses it.
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 Slack 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.
Over 150 actions, like managing channels, reacting to messages, handling files, setting reminders and more.
Yes — new channels, new messages, direct messages, and reactions can all trigger it.
In an encrypted vault, scoped to exactly the permissions you granted when connecting.
Slack blocks the action and shows an error. An admin needs to add that permission in Slack's settings — Composio won't quietly work around it.
Sometimes — a few actions need an exact channel ID instead of a channel name.
A normal Slack login. You pick the workspace and approve the permissions once.
Yes — SOC 2 Type II and ISO/IEC 27001:2022 certified, documented at trust.composio.dev.
"Send a reminder to the marketing channel at 10am" or "star this message from my manager."
When you connect a Slack account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Slack 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.
Exactly the ones Slack lists on its consent screen when you connect. Review that screen before approving. If you connect a work account, your Slack administrator may need to approve the app first, and you can revoke the access inside Slack whenever you want.
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 Slack 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.
Composio refreshes Slack tokens automatically, so day to day you do nothing. If you revoke access inside Slack, or Slack invalidates the session, the connection shows as expired in Composio and the agent stops acting on that account until you reconnect it, which is a single sign-in.
Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, and up to 20,000 of those can run through Composio-managed apps like Slack. Personal Slack use rarely gets near that. Paid plans add higher limits and team features, and Slack's own pricing is unaffected.
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 Slack accounts).
With Composio, you connect Slack 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 Slack.It takes 30 seconds.
Managed auth, hosted MCP servers, and every Slack tool your agent needs.Free to start.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Start building