OsmO Phone Calls

You:   Call the pharmacy on Main Street and ask if they're open until 9 tonight.
AI:    I'll call Main Street Pharmacy (+1 555 0100) and ask whether they're open until 9 tonight. OK?
You:   Yes.
AI:    (OsmO places the call, then reports what the pharmacy said, with a summary and transcript.)

This is an illustration of the flow, not a recorded conversation. The number is a placeholder.

New users get 50 free credits at getosmo.app/login, in the US, Canada, the UK and Australia. An answered call uses 3 credits, however long it is. A call nobody answers is free. With free credits, OsmO calls businesses and toll-free numbers; calling your contacts and scheduling calls need an OsmO app plan.

Contents

• How it works

• Connect your AI

• Example prompts

• What it can and can't do

• Cost

• Safety and privacy

• Tools

• What's in this repo

• Authentication and network

• Support, security and license

Related MCP server: Dialfetch MCP

How it works

sequenceDiagram
    participant You
    participant AI as Your AI app
    participant OsmO as OsmO MCP server<br/>(api.getosmo.app)
    participant Phone as The person or business
    You->>AI: "Call the clinic and move my appointment"
    AI->>OsmO: place_call (preview, nothing dialled)
    OsmO-->>AI: who will be called, the number, what will be said
    AI->>You: "OK to call?"
    You->>AI: "Yes"
    AI->>OsmO: place_call (confirmed)
    OsmO->>Phone: real phone call by OsmO's voice AI
    AI->>OsmO: get_call_status
    OsmO-->>AI: outcome, summary (transcript via get_call)
    AI->>You: what was said

There is nothing to install or run on your machine. Your AI app connects to OsmO's hosted MCP server. You sign in once in the browser with your phone number and a one-time code. There is no API key.

Connect your AI

Every app uses the same server URL: https://api.getosmo.app/mcp (Streamable HTTP, OAuth). When you first connect, the app opens OsmO's sign-in page. Enter your phone number and the one-time code there, never in the chat.

The "Guide" column links to OsmO's own step-by-step page for that app.

We have not tested the rows with no guide (OpenClaw, Hermes, Cline, Windsurf, OpenCode) end to end ourselves. Those rows follow each client's own documented syntax. If a command is out of date for your version, please open an issue.

Claude Code plugin

The plugin adds the MCP server and the osmo-phone-calls skill, which tells the AI to confirm before every call. Inside Claude Code:

/plugin marketplace add Mountainheads-Private-limited/osmo-ai-plugins
/plugin install osmo@osmo

On recent Claude Code versions this works in one step: /plugin install osmo --marketplace Mountainheads-Private-limited/osmo-ai-plugins. Then type /mcp, pick osmo and sign in. Install either the plugin or the claude mcp add server, not both, so Claude doesn't see two copies of the tools.

Codex plugin

The plugin carries the MCP server and the skill. In your shell:

codex plugin marketplace add Mountainheads-Private-limited/osmo-ai-plugins
codex plugin add osmo@osmo
codex mcp login osmo

VS Code

.vscode/mcp.json (workspace) or your user mcp.json:

{
  "servers": {
    "osmo": {
      "type": "http",
      "url": "https://api.getosmo.app/mcp"
    }
  }
}

Cursor

~/.cursor/mcp.json or .cursor/mcp.json:

{
  "mcpServers": {
    "osmo": {
      "url": "https://api.getosmo.app/mcp"
    }
  }
}

OpenClaw

openclaw skills install @getosmo/osmo-phone-calls
openclaw mcp set osmo '{"url":"https://api.getosmo.app/mcp","transport":"streamable-http","auth":"oauth"}'
openclaw mcp login osmo

Hermes

~/.hermes/config.yaml, then hermes mcp login osmo:

mcp_servers:
  osmo:
    url: "https://api.getosmo.app/mcp"
    auth: oauth

OpenCode

opencode.json (follows OpenCode's documented remote-server syntax; not yet tested by us):

{
  "mcp": {
    "osmo": {
      "type": "remote",
      "url": "https://api.getosmo.app/mcp"
    }
  }
}

Example prompts

• "Call the pharmacy on Main Street and ask if they're open until 9."

• "Call my dentist and move my appointment to next Tuesday afternoon."

• "Find the customer-care number for my airline and ask about my refund."

• "Get me a table for 4 at Luigi's on Friday at 8 pm."

• "Ask the hardware store on Elm Street if they have a 10 mm socket set in stock."

What it can and can't do

With free credits, OsmO calls businesses and toll-free numbers; calling your contacts and scheduling calls need an OsmO app plan.

With any account, including free credits:

• Book, reschedule or cancel an appointment or a table.

• Ask a shop, clinic or restaurant about opening hours, prices, stock or an order.

• Get through a company's phone menu to customer service.

• Call listed businesses (shops, clinics, restaurants, helplines) and toll-free numbers, up to 5 in one go.

• Find a business near you, or a company's customer-care number, in your own country.

• Report the outcome, a summary and the transcript of every call it made.

With an OsmO app plan (iOS, Android):

• Call your saved contacts and people who called you in the last 30 days, for example to pass a message.

• Schedule a call for later, and list or cancel scheduled calls.

• Tell you who called your OsmO number and what they wanted, and change your call-screening rules and settings.

It can't or won't:

• Call emergency services. Dial your local emergency number yourself.

• Send text messages or email.

• Call personal numbers found on the web.

• Need card numbers, bank PINs, passwords or sign-in codes typed into the chat. None of its tools take them, the skill tells your AI never to ask for them, and the sign-in code goes on OsmO's own page.

• Dial anything before you say yes.

Calls come from the OsmO number for your country. The voice AI speaks English, Spanish and Hindi.

Cost

If your free credits run out, the tools say so and point you to the OsmO app (getosmo.app/app).

Safety and privacy

• You confirm every call. place_call first returns a preview: who will be called, the number, what will be said and when. Nothing is dialled until your AI sends it back with your approval. Changing or deleting a setting or rule works the same way.

• Sign-in happens on OsmO's page, not in the chat. Never paste the one-time code into a chat. No API key or password is stored in this repo or in your AI app's config.

• One host. Everything goes to https://api.getosmo.app over HTTPS. This repo has no scripts, hooks or executable code.

• Annotations. Every tool declares MCP annotations (readOnlyHint, destructiveHint, openWorldHint). Tools that place calls are marked destructive and open-world, so well-behaved clients ask before running them.

• Disconnect by removing OsmO from your AI app's connector settings. If you use the OsmO app, also open the Sharing card → Connect AI apps → Disconnect. If you only use OsmO from AI apps, email team@getosmo.app with the mobile number you signed in with and we will end the access.

Read the privacy policy and terms.

Tools

The server's tools/list is the source of truth. This is what a standard MCP client (Claude, Cursor, Codex, Gemini CLI, Grok and others) gets today: 27 tools. ChatGPT is served the release its directory review approved, so its tool text can differ slightly.

What's in this repo

This repo holds the client side only, under the MIT license. The OsmO server is a hosted service; its code is not in this repo.

Authentication and network

• https://api.getosmo.app/mcp: hosted MCP (Streamable HTTP)

• https://api.getosmo.app/.well-known/oauth-protected-resource/mcp and /.well-known/oauth-authorization-server: discovery

• https://api.getosmo.app/mcp/oauth/authorize, /token, /register, /revoke: OAuth 2.1 with PKCE and dynamic client registration

• https://api.getosmo.app/mcp/oauth/connect: the sign-in page (phone number + one-time code)

Scopes advertised by the server: osmo.help, calls.read, calls.write, offline_access.

Support, security and license

• Help: getosmo.app/support or team@getosmo.app

• Security reports: see SECURITY.md

• Improving a client config or the skill: see CONTRIBUTING.md

• License: MIT for the files in this repo (LICENSE). Using OsmO is governed by the OsmO terms and privacy policy.

If OsmO makes a call you'd rather not make yourself, a ⭐ on this repo helps other people find it.