CosVoice

CosVoice gives AI assistants like Claude, ChatGPT, Grok and Cursor something they normally lack: a real US phone number and email address they can actually use. Connected through a hosted MCP server, your agent can place calls, answer incoming ones and send you written summaries of what was said, which turns a chat-based assistant into something closer to an AI chief of staff. The MCP-first setup is the differentiator over voice AI platforms that expect you to build telephony yourself — here the infrastructure is hosted and the integration is a config line. Pricing runs from $29/month across three tiers plus per-minute usage, so costs scale with call volume. It is infrastructure for people already running agent workflows rather than a consumer app, and call quality still depends on the underlying voice models. For founders and operators who want their agent to handle real phone calls, it removes the hardest plumbing step.