Slack for your AI agent

Give Claude Code, Cursor, Codex or your own agent Slack through one MCP URL and one key. Your team signs in to Slack once and the agent never holds a token. Reads run at once; anything that changes Slack waits for your approval.

Get your key Read the docs

165: Slack actions your agent gets as tools
1 URL: one endpoint, one key per agent
60/min: calls per key, hard caps on top
0: Slack credentials inside your agent

Actions

What your agent can do in Slack

A sample of the 165 actions. Your agent sees the full list with tools/list.

Reads · run at once

Search for channels in Enterprise organization
Test Slack API connection
Real-time search
Check search capabilities
Download Slack file
Fetch conversation history
Fetch item reactions
Retrieve conversation replies

Writes · wait for your approval

Add call participants
Add channel bookmark
Add emoji
Add an emoji alias
Add Enterprise user to workspace
Add reaction to message
Add a remote file
Add a star to an item

Quickstart

Connect Slack to your agent in two minutes

Create your account and connect Slack with its normal sign-in page.
Open Developers and create an agent key (you can limit it to Slack).
Add the server to your client:

Claude Code · Terminal

claude mcp add --transport http vellarin https://hub.vellarin.ai/api/hub/mcp --header "Authorization: Bearer <key>"

Cursor · ~/.cursor/mcp.json (or .cursor/mcp.json in a project)

{
  "mcpServers": {
    "vellarin": {
      "url": "https://hub.vellarin.ai/api/hub/mcp",
      "headers": {
        "Authorization": "Bearer ${env:VELLARIN_HUB_KEY}"
      }
    }
  }
}

Codex · ~/.codex/config.toml

[mcp_servers.vellarin]
url = "https://hub.vellarin.ai/api/hub/mcp"
bearer_token_env_var = "VELLARIN_HUB_KEY"

Questions

Slack and AI agents

How do I connect Slack to Claude Code, Cursor or Codex?

Create a free Vellarin account, connect Slack with its normal sign-in, create an agent key on the Developers page and add the Vellarin Hub MCP server to your client with one line. Your agent then sees the Slack actions as tools.

Can my agent change things in Slack without asking me?

No. Read actions run at once. Any action that sends, creates, changes or deletes something in Slack waits for the workspace owner's approval and then runs exactly once.

Does my agent get my Slack password or token?

No. The sign-in lives on the server side. Your agent holds only a Vellarin Hub key, which you can scope to Slack alone, cap per day and per month, and revoke at any moment.

What does it cost?

Hub Free includes 500 app calls a month and 1 agent key, with no card. Over the cap the answer is "upgrade or wait", never a charge.