The AI you already use, on the phone.

In ChatGPT on the web, open Plugins, click + and choose Add custom MCP server.

Name it Smitline, paste the server URL, and set authentication to OAuth:

https://app.smitline.com/mcp

Tick I understand and want to continue, choose Create as a plugin, check the tools, and install it.

Sign in to Smitline when asked, and allow access. Then, in a new chat, type @ and pick Smitline.

In Claude, open Customize → Connectors, click + Add and choose Add custom connector.

Name it Smitline, paste the URL and click Continue:

https://app.smitline.com/mcp

Choose Sign in now and click Add. Sign in to Smitline and allow access. If Claude asks which OAuth client to use, Register automatically works.

In a chat, click + → Connectors and turn Smitline on, then ask for a call.

Go to grok.com/connectors, click New Connector and choose Custom.

Paste the MCP server URL:

https://app.smitline.com/mcp

Sign in to Smitline when Grok asks, and allow access. Grok then uses Smitline when you ask for a call.

In your Smitline dashboard, open Connect → API keys and click Create key. Keep the page open: the key is shown once.

In Muse, send this message:

Set up Smitline as a custom connector: https://smitline.com/agents

Muse reads the setup page and asks for your key. Paste it into Muse’s Secure Credentials prompt, never into the chat.

Approve the connector, then try it: “Use Smitline to call my phone for a quick test.”

Open Plugins in the sidebar (or Customize → Connectors), then Add custom → Add MCP connector → Remote.

Name it Smitline and paste the server URL:

https://app.smitline.com/mcp

Under Advanced, set authentication to OAuth and transport to Streamable HTTP. Tick the acknowledgement and click Add.

Click the Smitline card to sign in and turn it on. Then ask: “Using Smitline, call …”.

Add Smitline from a terminal. --scope user makes it available in every project:

claude mcp add --transport http --scope user smitline https://app.smitline.com/mcp

In Claude Code, run /mcp, choose smitline and Authenticate. Sign in to Smitline and allow access.

Add Smitline to ~/.cursor/mcp.json (or .cursor/mcp.json in one project):

{
  "mcpServers": {
    "smitline": {
      "url": "https://app.smitline.com/mcp"
    }
  }
}

Cursor shows Smitline under Customize → MCP. Click Connect, sign in to Smitline and allow access.

Start a call with a brief: who to call, what the call must achieve, and what to find out:

curl https://app.smitline.com/v1/calls \
  -H "Authorization: Bearer YOUR_SMITLINE_KEY" \
  -H "content-type: application/json" \
  -d '{
    "channel": "phone",
    "to": "+14165550134",
    "onBehalfOf": "Alex",
    "objective": "Book a table for 2 at 7 pm on Friday.",
    "questions": ["Is 7 pm free? If not, the closest time before 8 pm?"],
    "mayAgreeTo": ["any time from 6:30 to 8 pm"]
  }'

Then follow it with GET https://app.smitline.com/v1/calls/{id}/wait (or /events for live updates) until it ends, and read the summary, details and transcript.