Yo MCP Server

by alfongj-com Your server? Claim it

answering

Yo is answering right now. Last checked 15 min ago. It exposes 5 tools. Last commit 9 Aug 2026.

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

Uptime history 33 days of history · worst day 78%

33 days agonow

82.6%

Uptime 24h

76 of 92 checks

Tools

read from the server

387 ms

Response time

average over 24h

Stars

last commit 9 Aug 2026

What changed 5

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

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 97.5% 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 15 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "yo": {
      "url": "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

{
  "mcpServers": {
    "yo": {
      "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 — a content-free push notification — to your owner. Requires an agent API key as the Bearer token. Optionally include a context_url the notification tap-through will open.

Endpoints

URL	Transport	State	Latency	Checked
https://getyo.dev/mcp	streamable-http	answering	311 ms	15 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 76 of 92 checks got a reply (82.6%), average response time 387 ms. The bar chart above shows every period we have measured.

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 with the file path 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 387 ms on average, which is faster than 42% 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?

Yes — it is published under the MIT licence and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.