Yo MCP Server

by alfongj-com Your server? Claim it

not responding

Yo is listed as active in the registry but did not answer our last check. It exposes 5 tools. Last commit 9 Aug 2026.

Let agents send content-free push notifications to a paired phone via MCP.

Uptime history 79 days of history · worst day 0%

79 days agonow

2.2%

Uptime 24h

2 of 91 checks

Tools

read from the server

300 ms

Response time

average over 24h

Stars

last commit 9 Aug 2026

What changed 7

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 9 August 2026. No other catalogue keeps this.

18 Oct a tool description was rewritten yo

18 Oct a tool changed the parameters it asks for yo

9 Aug 2 tools appeared cancel_registration, revoke_self

9 Aug 2 tool descriptions were rewritten cancel_registration, check_registration

9 Aug a tool changed the parameters it asks for check_registration

Yo does not always answer

Over the last week it answered 1.7% 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 5 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add yo --transport http https://getyo.dev/mcp

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

https://getyo.dev/mcp

~/.codex/config.toml

[mcp_servers.yo]
url = "https://getyo.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "yo": {
      "url": "https://getyo.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "yo": {
      "type": "http",
      "url": "https://getyo.dev/mcp"
    }
  }
}

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

cancel

cancel_registration

Abort a pairing you started with register_agent. Works while pending and after approval: an already-approved connection is revoked (the API key stops working) so a pairing approved by the wrong account can be undone. Available until the pairing expires, and for 15 minutes after you pick up the API key; later than that, use revoke_self. Then call register_agent again.

register_agent

Register this agent with Yo (unauthenticated). Returns a pairing URL and code to show the user, who approves the connection in the Yo app. Then poll check_registration to obtain the API key.

registration

check_registration

Check the status of a pairing code from register_agent. On the first poll after the user approves, the response includes the api_key exactly once — store it immediately in your secret mechanism — plus paired_with, the account the agent is now connected to, which you MUST show the user.

revoke

revoke_self

Permanently revoke THIS agent using its API key as the Bearer token. Use when you discover (at any time) that paired_with is not your owner’s account and cancel_registration no longer works. The key stops working immediately; call register_agent to start over.

yo

Send a Yo push notification to your owner. Recommended: include a short subject explaining what the notification is about, and a context_url when there is a useful link to open. The subject appears on the lock screen and in the app; avoid secrets. Requires an agent API key as the Bearer token.

Endpoints

URL	Transport	State	Latency	Checked
https://getyo.dev/mcp	streamable-http	answering	64 ms	5 min ago

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Yo — questions

Answers built from our own checks of this server.

What can Yo do?

It exposes 5 tools, read directly from the server on our last check. Among them: cancel_registration, check_registration, register_agent, revoke_self, yo. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Yo working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 2 of 91 checks got a reply (2.2%), average response time 300 ms. The bar chart above shows every period we have measured.

The registry lists Yo 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 Yo?

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 Yo need an API key?

No. Yo completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Yo?

It answers our handshake in 300 ms on average, which is faster than 55% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Yo open source?

The code is open source: it is published under the MIT licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at getyo.dev, which runs on its operator's own terms.