Harp MCP Server

by harpgtm Your server? Claim it

not responding

Harp is listed as active in the registry but did not answer our last check.

Outbound sales rails for Claude: accounts, contacts, sequences and replies, sent from your mailbox.

Uptime history 43 hours of history · worst hour 0%

43 hours agonow

36.3%

Uptime 24h

33 of 91 checks

—

Tools

hidden behind auth

847 ms

Response time

average over 24h

open, no key

Access

streamable-http

Harp does not always answer

Over the last week it answered 63.8% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add harp --transport http https://harpgtm.com/api/mcp

Settings → Connectors → Add custom connector, then paste this address

https://harpgtm.com/api/mcp

~/.codex/config.toml

[mcp_servers.harp]
url = "https://harpgtm.com/api/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "harp": {
      "url": "https://harpgtm.com/api/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "harp": {
      "type": "http",
      "url": "https://harpgtm.com/api/mcp"
    }
  }
}

Endpoints

URL	Transport	State	Latency	Checked
https://harpgtm.com/api/mcp	streamable-http	answering	58 ms	10 min ago

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Harp — questions

Answers built from our own checks of this server.

Is Harp working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 33 of 91 checks got a reply (36.3%), average response time 847 ms. The bar chart above shows every period we have measured.

The registry lists Harp as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Harp?

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.

Does Harp need an API key?

No. Harp completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. This is what we observed, not what the docs claim.

How fast is Harp?

It answers our handshake in 847 ms on average, which is faster than 8% 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.