The JustCall Model Context Protocol (MCP) Server lets Large Language Models (LLMs) and AI agents make real-world voice calls and send SMS directly through JustCall’s APIs — securely, contextually, and programmatically.
It provides a function-calling interface for conversational AI systems, enabling:
📞 AI-powered calling: Let your LLM initiate, manage, or transcribe calls using JustCall.
💬 Smart messaging: Allow your AI agent to send or respond to SMS within conversations.
⚙️ Seamless integration: Use the MCP standard to connect JustCall’s telephony capabilities with any LLM runtime or orchestration framework.
In short: It gives your LLMs a voice and a phone number — turning chatbots into truly conversational agents.
Server Config
{
"mcpServers": {
"justcall": {
"url": "https://mcp.justcall.host/mcp",
"headers": {
"Authorization": "Bearer <JUSTCALL_API_KEY>:<JUSTCALL_API_SECRET>"
}
}
}
}