Voicetta.
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    Voicetta API

    Claude

    Open Settings → Connect to Claude, copy the connection URL, and paste it into Claude Desktop.

    On this page

    Claude can ask Voicetta to place a phone call from your workspace and then read back what happened.

    This connector is for your own Claude account. It is a remote MCP server. It is not Setup MCP, which provisions a new agent at https://mcp.voicetta.com/mcp.

    Give at least one agent a phone number with outbound calling enabled.

    Connect Claude

    In Voicetta, open Settings → Connect to Claude. The page creates a connection URL for this workspace. The key inside it can already read calls and place them. You do not create a key or tick a permission yourself.

    Settings → Connect to Claude. Copy the connection URL.

    The URL looks like this:

    text
    https://api.voicetta.com/mcp?token=vk_live_...

    That whole URL is the secret. Do not share it. Copy it, then:

    1. Open Claude Desktop. Go to Settings → Connectors. On some versions this is Customize → Connectors.
    2. Add a custom connector. Click Manage Connectors, then Add custom connector. If a Voicetta connector is already saved, remove it first. Claude does not let you change the URL afterwards.

    Add custom connector. Name it Voicetta and paste the connection URL.

    1. Enter the details. Name it Voicetta. Paste the connection URL. Choose No sign-in. Leave OAuth client ID, client secret, and request headers empty.

    No sign-in is selected. Do not add a request header. 4. Connect. Click Connect. In a chat, open + → Connectors and turn Voicetta on.

    Claude then calls initialize and lists two tools:

    ToolWhat it does
    voicetta_list_assistantsLists agents, the numbers they can dial from, and the prompt variables.
    voicetta_get_it_doneStarts a call. Arguments: goal, to, optional assistant_id and customer_name. Returns a task_id.
    voicetta_get_taskReads status and the result after the call ends.
    voicetta_list_callsLists recent voice calls.
    voicetta_get_callReads one call, including the transcript this key is allowed to see.
    voicetta_list_messagesLists recent SMS and WhatsApp messages.
    voicetta_get_threadReads one completed text thread.

    Try it

    Ask Claude something like:

    Get a refund for my stay on 12 October. Call +48 123 456 789. Use only Voicetta.

    Claude should call voicetta_get_it_done, then poll voicetta_get_task until status is completed or failed.

    If you omit assistant_id, Voicetta picks the workspace agent that can already dial out.

    What the agent does on the call

    The outbound prompt gets one extra block: accomplish goal. It does not answer as an inbound receptionist. Voice, number, SMS, and email tools stay as you configured them.

    If it does not connect

    • Authentication must be No sign-in. This server has no OAuth. Sign in now looks for an authorization server and fails.
    • The URL must include ?token= and the full key. Do not also set an Authorization header.
    • A connector saved with the wrong URL has to be removed and added again.
    • The host must be https://api.voicetta.com/mcp, not mcp.voicetta.com, which is Setup MCP.
    • Use the URL from Settings → Connect to Claude. Do not build it by hand.
    • Outbound calling must be enabled for the agent's number.
    • The destination must be E.164, for example +14155559999.

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