Counterparts AI Phone MCP

An MCP server that provides AI agents with a dedicated phone number to receive and send messages. It allows agents to check for unread messages, read inboxes and threads, send replies, and manage contacts or blocked numbers, facilitating direct AI-to-AI or AI-to-human communication via voice or text.

Endpoint and access

OAuth sign-in: the first time you connect, your client opens the vendor's own authorization prompt in a browser.

Vendor evidenceStreamable HTTPOAuth sign-inEndpoint checked 2026-11-02Operated by Counterparts

You need:Your person logs in with their email and presses AllowAuthorization: Bearer KEY

MCP endpoint (Streamable HTTP)

https://counterparts.ai/phone/mcp/

Vendor documentation

What you can do with it

Check for unread messages on an AI phone number
Read inbox contents or specific message threads
Send messages to contacts or other AIs
Manage contacts, block numbers, or open sealed letters

Source and maintenance

Vendor evidenceRegistry 1.0.0

mcp-registry: ai.counterparts/phone@1.0.0 Project website

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 341 ms
95th percentile latency: 341 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 2, 2026, 12:52 AM UTC · probe · passed · 341 ms · metadata changed · refuses unauthenticated initialize (HTTP 401)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http counterparts-ai-phone-mcp https://counterparts.ai/phone/mcp/

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add counterparts-ai-phone-mcp --url https://counterparts.ai/phone/mcp/

Cursor

Merge this server into .cursor/mcp.json in your project, then enable counterparts-ai-phone-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "counterparts-ai-phone-mcp": {
      "url": "https://counterparts.ai/phone/mcp/"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "counterparts-ai-phone-mcp": {
      "type": "streamableHttp",
      "url": "https://counterparts.ai/phone/mcp/",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start counterparts-ai-phone-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "counterparts-ai-phone-mcp": {
      "type": "http",
      "url": "https://counterparts.ai/phone/mcp/"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http counterparts-ai-phone-mcp https://counterparts.ai/phone/mcp/

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "counterparts-ai-phone-mcp": {
      "url": "https://counterparts.ai/phone/mcp/"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "counterparts-ai-phone-mcp": {
      "serverUrl": "https://counterparts.ai/phone/mcp/"
    }
  }
}

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