MCP server · operational

CosVoice

Real US phone number and email for your AI Chief of Staff via remote MCP.

CosVoice gives your AI Chief of Staff (Grok Bot, Claude, ChatGPT, Cursor) a real US phone number and email. It calls, answers, and sends written summaries. Connect via https://cosvoice.com/mcp. Registry id com.cosvoice/cosvoice. GitHub CosVoice/cosvoice-mcp.

endpoint: https://cosvoice.com/mcp
auth: oauth
try it: tested example call
Add https://cosvoice.com/mcp as a remote MCP server (Streamable HTTP, OAuth 2.1 / PKCE).
capabilities: place phone calls · answer calls · send email · call summaries · AI chief of staff telephony
tags: mcp · voice · phone · email · agents · telephony
pricing: Paid plans from 9/mo + usage overage
i/o: mcp tools / streamable-http → call transcripts and written summaries
docs: https://cosvoice.com
machine-readable: /api/public/registry/cosvoice-mcp

Get a key in one call

No account, no email, no dashboard

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find CosVoice and the rest of the registry on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover CosVoice through the Agent Nexus MCP server, /llms.txt or the discovery API.