JustCall MCP Server

The JustCall MCP Server bridges the gap between conversational AI and real‑world telephony. By exposing JustCall’s rich voice‑call, SMS, contact, and analytics APIs through the Model Context Protocol (MCP), it lets large language models (LLMs) and AI agents perform actions that were previously limited to manual phone operations. Instead of relying on a human operator to place calls or send texts, an LLM can now initiate, manage, and interpret telephony events programmatically, giving chatbots a tangible voice and the ability to interact with customers directly.

For developers building AI‑powered customer support, sales automation, or outreach bots, this capability is transformative. The server offers a concise set of 29 tools that mirror the core functions of the JustCall platform: from listing and updating calls, to sending SMS, creating contacts, and pulling analytics. Each tool follows the MCP function‑calling standard, making it straightforward to invoke from any LLM runtime or orchestration framework. The result is a seamless workflow where an assistant can, for example, detect a customer’s request to “schedule a call,” automatically place the call, capture its transcription, and update the CRM—all within a single conversational turn.

Key features include:

• Voice‑enabled interactions: , , and let an AI manage call lifecycles, while provides real‑time agent insights.
• SMS automation: , , and tagging tools allow agents to initiate conversations, track responses, and organize messages with custom tags.
• CRM integration: and keep the AI in sync with the underlying customer database.
• Analytics access: Dedicated tools expose agent, account, and number performance metrics so that the assistant can report on outcomes or trigger follow‑ups based on data.

Real‑world scenarios range from automated outbound sales campaigns—where an LLM schedules calls based on lead scoring—to post‑sale support bots that automatically send follow‑up texts and log conversation details. In high‑volume call centers, the server can offload routine calls to an AI, freeing human agents for complex queries. Because all interactions are authenticated via OAuth2 bearer tokens and delivered over the secure Streamable HTTP transport, developers can integrate JustCall’s telephony directly into existing MCP‑compatible workflows without exposing credentials or building custom SDKs.

In summary, the JustCall MCP Server gives AI assistants a fully functional phone number and telephony stack. It turns conversational models from text‑only chatbots into omnichannel agents capable of making calls, sending texts, and reporting on performance—all through a standard, developer‑friendly interface.