CosVoice

Real US phone + email for your AI Agent — Grok Bot, Claude, ChatGPT, Cursor, and Meta Muse.

CosVoice gives your AI Agent (Grok Bot, Claude, ChatGPT, Cursor, or Meta Muse) a real US phone number and email. It places and answers calls, books by phone, and sends written summaries. Connect as a remote MCP server at https://cosvoice.com/mcp (Streamable HTTP, OAuth 2.1 / PKCE) or via OpenAPI at https://cosvoice.com/openapi.json. GitHub: https://github.com/CosVoice/cosvoice-mcp. 7-day free trial

Best for agent capabilities

User communication Workflow automation

Useful in agent tasks

Communicate with users

Send timely, personalized messages and handle conversations across channels.

Automate business workflows

Connect services and coordinate durable multi-step operational work.

Overview

Websitecosvoice.com

Authoauth

Pricing$29/month

SDKsmcp, openapi

OpenAPIYes

MCP SupportYes

When to use CosVoice

CosVoice is listed for voice, telephony, Communication workflows. CosVoice gives your AI Agent (Grok Bot, Claude, ChatGPT, Cursor, or Meta Muse) a real US phone number and email. It places and answers calls, books by phone, and sends written summaries. Connect as a remote MCP server at https://cosvoice.com/mcp (Streamable HTTP, OAuth 2.1 / PKCE) or via OpenAPI at https://cosvoice.com/openapi.json. GitHub: https://github.com/CosVoice/cosvoice-mcp. 7-day free trial Consider it when an agent needs this capability through a documented service boundary instead of custom infrastructure maintained inside the application.

In 4agent’s task model, the product maps to User communication, Workflow automation. That makes it a candidate for these tasks: Communicate with users, Automate business workflows.

Integration checklist

Access: Confirm the oauth authentication flow, credential scope, rotation process, and whether calls can be attributed to a user or service identity.
Client support: Official or documented clients are listed for mcp, openapi.
Automation: OpenAPI: listed as available; MCP: listed as available; CLI: not currently recorded. Confirm each requirement in the provider's current documentation.
Operations: Test rate limits, timeouts, retry safety, error payloads, logs, data retention, and the current paid pricing model with production-like volume.

Sources and verification

Use these primary sources to verify current behavior before making an implementation or purchasing decision. Product capabilities, limits, and prices can change after a 4agent listing is reviewed.