How to Use the JustCall MCP in Mastra AI

Q: How do I monitor JustCall webhooks in Mastra AI?

Use the listwebhooks tool to verify your active subscriptions. You can then route those events into your agent's trigger handlers.

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Connect JustCall MCP to Mastra AI

Create your Vinkius account to connect JustCall to Mastra AI and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup JustCall with Mastra AI

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Automated call logging with Mastra AI

Chain `list_calls` into your Mastra workflow engine to trigger actions based on call history. If a call is missed, your agent can automatically queue a follow-up task. Define clear branching logic for your agents. You handle exceptions by checking `get_call_details` before deciding the next step in the sequence.

Managed messaging workflows for Mastra AI

Use the `send_message` tool to notify team members when high-priority tasks hit the queue. The workflow engine manages the retries if the network blips. Your agents maintain state across multiple steps. You can verify message delivery by checking the logs provided by `get_message_details` within your agent's execution loop.

Team coordination using JustCall tools

Pull your current staff list with `list_team_users` to assign support tickets to the right person. This ensures your agents always have the latest directory information. Scale your operations by automating the assignment process. Your agents interact with the JustCall backend to keep your team rosters updated without manual input.

Setup guide

Set up JustCall MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All JustCall tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "justcall-alternative-mcp-client",
  servers: {
    "justcall-alternative-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "JustCall Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to JustCall tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent JustCall transactions"
);
console.log(result.text);

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Common questions about JustCall MCP in Mastra AI

Add the server URL to your Mastra MCP configuration. The framework automatically detects the available tools, allowing you to include `list_calls` in your agent steps.

It can. Mastra includes built-in support for exponential backoff, which is useful when calling JustCall endpoints that might hit rate limits.

Yes. You can toggle the approval setting in your agent configuration to pause execution before the `send_message` tool fires.

Use the `list_webhooks` tool to verify your active subscriptions. You can then route those events into your agent's trigger handlers.

Your data is only accessed through authenticated API calls. The MCP Server ensures that contact details are restricted to the specific agent tasks you authorize.

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