@handset/mcp

@handset/mcp

The Handset API as an MCP server: give any AI agent a business phone system — send texts, place calls, read live transcripts and AI summaries, buy numbers, provision tenants.

Setup

# Claude Code
claude mcp add handset -e HANDSET_API_KEY=hs_test_... -- npx -y @handset/mcp

// Claude Desktop / Cursor (mcpServers config)
{
  "handset": {
    "command": "npx",
    "args": ["-y", "@handset/mcp"],
    "env": { "HANDSET_API_KEY": "hs_test_..." }
  }
}

Use your test-mode key: it runs Handset's simulated carrier — numbers are free and instant, calls answer in a second, nothing touches a real phone. The server refuses hs_live_ keys unless HANDSET_ALLOW_LIVE=1 is set, because a live key lets the agent text and call real people.

Tools

Tenants & numbers: list_tenants, create_tenant, search_numbers, buy_number, list_numbers · Messaging: send_message, list_conversations, get_thread · Voice: make_call, get_call, list_calls, get_transcript, start_transcription, list_voicemails · get_usage.

Companion skill

npx -y @handset/mcp --skill prints an agent skill (SKILL.md) that teaches coding agents the Handset integration patterns — pipe it into .claude/skills/handset/SKILL.md.

Docs: https://docs.handset.dev · Get a key: https://handset.dev/early-access