# Harness MCP: Use Harness in Slack and Email

Source: https://maito.app/integrations/harness

Connect the Harness MCP server to Maito with one sign-in, and your whole team can use it from Slack or email: “Why did the payments service deployment fail on staging?”

Harness builds, ships and secures apps with pipelines and deployments. Connect the Harness MCP server to Maito once, and everyone on your team can use Harness from Slack, by email, or from Claude, ChatGPT, Cursor, Codex, Grok or Muse. Nobody else has to sign in.

-   Connects in one click
-   Sign in with Harness
-   One connection for the whole team
-   Server by [Harness.io](https://www.harness.io/)

Updated October 21, 2026

## What you can ask with Harness

Requests to Maito

![Dana](https://maito.app/marketing-avatars/dana.webp)

Dana in Slack

Why did the payments service deployment fail on staging?

![Sam](https://maito.app/marketing-avatars/sam.webp)

Sam by email

Which pipelines ran in production today, and did they pass?

Maito uses Harness to do the work and replies where you asked.

## How to connect Harness

Open Connections in your workspace and choose Connect next to Harness. You sign in to Harness in a new tab, and that's the whole setup. Name the account and choose Workspace under who can use it. That's the only time anyone signs in: your whole team, shared chats and Loops can use Harness from then on. Or skip ahead and ask for the work: Maito sends you a link if Harness isn't connected yet.

## Questions

### What is the Harness MCP server URL?

Harness.io publishes it at https://mcp.harness.io/mcp, and it signs in with OAuth, so there's no key to copy.

### Can I use the Harness MCP server from Slack?

Yes. Connect it to Maito once, then mention Maito in any Slack channel or send it a direct message. The same connection works by email and from Claude, ChatGPT, Cursor, Codex, Grok or Muse.

### Does everyone on my team have to connect Harness?

No. One person connects it once and chooses Workspace. Then everyone in the workspace, shared chats and Loops can use Harness, without signing in themselves. Choose Only me instead to keep it to your own chats.

### Do I have to connect Harness before I ask?

No. If a request needs Harness and it isn't connected yet, your agent sends you a link. Connect it, and the work picks up where it stopped.

### Can I limit what Maito does in Harness?

Yes. After you connect, turn off any Harness tools you don't want Maito to use, such as the ones that change data. Tools Harness adds later stay off until you turn them on.

## Also in Developer tools

-   [Supabase Supabase is a Postgres database with authentication and storage.](https://maito.app/integrations/supabase)
-   [GitHub GitHub hosts your code: repositories, pull requests, issues and Actions.](https://maito.app/integrations/github)
-   [GitLab GitLab hosts your code: projects, issues, merge requests and CI/CD.](https://maito.app/integrations/gitlab)
-   [Lovable Lovable builds web apps from prompts, then lets you inspect and deploy them.](https://maito.app/integrations/lovable)
-   [Postman Postman holds your API collections, environments and docs.](https://maito.app/integrations/postman)
-   [Context7 Context7 has current documentation for popular code libraries.](https://maito.app/integrations/context7)

[See all integrations](https://maito.app/integrations)

## Put your AI employee to work.

Set it up in minutes. Connect Harness, then hand Maito the first job.

[Put Maito to work](https://maito.app/login?returnTo=%2Fintegrations%2Fharness)[Book a demo](https://cal.com/ddubovetzky/chat-with-the-founder)