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Slackline MCP Server

answering

Slackline is answering right now. Last checked 8 min ago. Last commit 6 Nov 2026.

Chat with your AI agents from Slack: each gets a thread in your DM, and your replies there wake it.

Uptime history 69 hours of history
69 hours agonow
100.0%
Uptime 24h
91 of 91 checks
—
Tools
hidden behind auth
623 ms
Response time
average over 24h
0
Stars
last commit 6 Nov 2026

What the code does

We read the source, 21 h ago · rules 995398eba69f

Evidence

Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.

Reaches cloud metadata service agentchat/mail.go:119, sketch/cheat.go:165
    req, _ := http.NewRequestWithContext(ctx, "GET", "http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token", nil)
Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Builds a file path from a variable email/emailtest/emailtest.go:28
        path := filepath.Join("testdata", name+f.ext)
        select {
        case <-ctx.Done():
            return
        case <-time.After(tickEvery + time.Duration(rand.IntN(200))*time.Millisecond):

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

We found things in this code

Code changes quietly between releases, and nobody reads the diff of a dependency. We do, on every release — watch Slackline and you get told the day something new turns up.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

run in your terminal
claude mcp add slackline --transport http https://slackline.wakeshift.ai/mcp
Settings → Connectors → Add custom connector, then paste this address
https://slackline.wakeshift.ai/mcp
~/.codex/config.toml
[mcp_servers.slackline]
url = "https://slackline.wakeshift.ai/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "slackline": {
      "url": "https://slackline.wakeshift.ai/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "slackline": {
      "type": "http",
      "url": "https://slackline.wakeshift.ai/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints

URLTransportStateLatencyChecked
https://slackline.wakeshift.ai/mcp streamable-http sign-in 10534 ms 8 min ago

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Slackline — questions

Answers built from our own checks of this server.

Why is there no tool list for Slackline?
The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.
Is Slackline working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 623 ms. The bar chart above shows every period we have measured.
How do I connect Slackline?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.
How do you sign in to Slackline?
No API key is involved. Slackline answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.
How fast is Slackline?
It answers our handshake in 623 ms on average, which is faster than 16% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Slackline open source?
The code is open source: it is published under the Apache-2.0 licence, written in Go and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at slackline.wakeshift.ai, which runs on its operator's own terms.