What this is

DialMCP is a remote MCP server at https://mcp.dialmcp.com/mcp. Any client that speaks Streamable HTTP with OAuth can connect to it directly — no install, no API keys. You do not need this package for those clients.

This repository exists for two reasons:

1. A stdio bridge for clients that only support local servers. Some MCP clients still can't talk to remote servers. dialmcp-connector launches a local stdio server that proxies to the hosted endpoint and handles the OAuth browser flow for you.
2. The open, canonical documentation of the DialMCP integration — tool schemas, client configs, the server.json registry manifest, and the safety model — in one auditable place.

The hosted calling service itself is closed-source. This connector is MIT-licensed and contains no proprietary logic: it is a thin transport shim over a public endpoint.

Quick start

Direct connection (preferred)

If your client supports remote MCP servers, skip this package entirely:

URL:        https://mcp.dialmcp.com/mcp
Transport:  Streamable HTTP
Auth:       OAuth 2.1 (sign in with your phone number)

claude mcp add --transport http dialmcp https://mcp.dialmcp.com/mcp
# add --scope user to enable it in every project

[mcp_servers.dialmcp]
url = "https://mcp.dialmcp.com/mcp"

Settings → Connectors → Add custom connector → paste https://mcp.dialmcp.com/mcp.

Settings → Connectors → Add MCP server → paste the URL (HTTP / OAuth) → complete SMS verification.

On first connect a browser window opens for sign-in. Verify your phone number with an SMS code — that number becomes your caller ID.

Via this connector (stdio-only clients)

npx dialmcp-connector

Or in an MCP client config:

{
  "mcpServers": {
    "dialmcp": {
      "command": "npx",
      "args": ["-y", "dialmcp-connector"]
    }
  }
}

See examples/ for ready-to-paste configs.

Tools

| Tool | Description | |---|---| | place_call | Start an outbound phone call to a US or Canadian number with a stated objective. Returns immediately with a call ID — the call runs asynchronously. | | get_call | Fetch the current state of a call: status, live progress, and once finished the transcript, recording link, and structured resolution. Poll this after place_call. | | end_call | Hang up an in-progress call immediately. | | list_calls | List recent calls for the authenticated user with their statuses and outcomes. |

The API is async by design: place_call returns instantly with a call ID and your agent polls get_call, so a multi-minute call never trips a client's tool timeout.

When a call completes, get_call returns a structured resolution — achieved, partially_achieved, or not_achieved — with a summary, any commitments the other party made, suggested follow-ups, a turn-by-turn transcript, and a signed link to the audio recording.

During the call the service presses keys through automated phone trees, waits silently through hold music, and detects voicemail — hanging up rather than leaving a message.

Safety model

Every protection is enforced server-side, not as model instructions the agent could talk itself out of.

• Disclosure. Every call opens by stating it's an AI assistant, who it's calling for, and that the line is recorded — before the ask. Compliance is independently verified against each transcript and logged. The agent never denies being an AI, and ends the call if the callee objects.
• Your real number. Calls present your own SMS-verified caller ID. Nothing is spoofed, and recipients can call you back.
• Rate limits. 1 concurrent call · 3/hour · 10/day · max 2/day to the same destination · 6-minute default and 10-minute hard cap, watchdog-enforced. Bulk calling is impossible by construction.
• Time and place. 8:00–21:00 destination local time (TCPA-aligned), US and Canada only. Unknown time zones are treated conservatively.
• Non-bypassable blocklist. Emergency services (911), premium-rate lines (900/976), and high-fraud ranges can never be dialed.
• Permanent opt-outs. Do-not-call requests are confirmed on the call, caught by a second independent transcript review, stored permanently, and enforced platform-wide across every user. Public self-serve opt-out at https://mcp.dialmcp.com/opt-out — no account needed.
• Objective screening. An independent reviewer screens each call's stated objective for harassment, deception, or fraud before dialing. The agent states only facts supplied in the task.
• Prohibited uses. Telemarketing, cold outreach, robocalling, surveys, lead generation, debt collection, and political outreach are barred by the Terms.

Full detail: https://dialmcp.com/safety.html

Requirements

• Node.js 18 or newer (only if you use the stdio bridge)
• A US or Canadian mobile number for SMS verification
• Users must be 18 or older

Links

• Website — https://dialmcp.com
• Safety and anti-spam — https://dialmcp.com/safety.html
• Privacy — https://dialmcp.com/privacy
• Terms — https://dialmcp.com/terms
• Do-not-call opt-out — https://mcp.dialmcp.com/opt-out
• Support — [email protected]

Contributing

Issues and pull requests are welcome for the connector, docs, and client configs. Bugs in the hosted service itself are best sent to [email protected]. Please read SECURITY.md before reporting anything security-related.

License

MIT © Datawizz Inc. See LICENSE.