JustCall MCP Server for Mastra AIGive Mastra AI instant access to 12 tools to Create Contact, Get Account Profile, Get Call Details, and more
GDPR Free for SubscribersMastra AI is a TypeScript-native agent framework built for modern web stacks. Connect JustCall through Vinkius and Mastra agents discover all tools automatically. type-safe, streaming-ready, and deployable anywhere Node.js runs.
Ask AI about this MCP Server for Mastra AI
The JustCall MCP Server for Mastra AI is a standout in the Customer Support category — giving your AI agent 12 tools to work with, ready to go from day one.
Vinkius delivers Streamable HTTP and SSE to any MCP client
Geminiimport { Agent } from "@mastra/core/agent";
import { createMCPClient } from "@mastra/mcp";
import { openai } from "@ai-sdk/openai";
async function main() {
// Your Vinkius token. get it at cloud.vinkius.com
const mcpClient = await createMCPClient({
servers: {
"justcall-alternative": {
url: "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
},
},
});
const tools = await mcpClient.getTools();
const agent = new Agent({
name: "JustCall Agent",
instructions:
"You help users interact with JustCall " +
"using 12 tools.",
model: openai("gpt-4o"),
tools,
});
const result = await agent.generate(
"What can I do with JustCall?"
);
console.log(result.text);
}
main();
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
About JustCall MCP Server
Connect your JustCall account to any AI agent and manage phone communications through natural conversation.
Mastra's agent abstraction provides a clean separation between LLM logic and JustCall tool infrastructure. Connect 12 tools through Vinkius and use Mastra's built-in workflow engine to chain tool calls with conditional logic, retries, and parallel execution. deployable to any Node.js host in one command.
What you can do
- Call Management — Make outbound calls, track call logs with duration and status
- SMS Messaging — Send text messages to contacts and track delivery
- Contact Database — List contacts, create new entries, and inspect profiles
- Call Recordings — Access call recordings with metadata
- Phone Numbers — List available and assigned phone numbers
- Agent Monitoring — Track agent performance, call volumes, and availability
The JustCall MCP Server exposes 12 tools through the Vinkius. Connect it to Mastra AI in under two minutes — credentials fully managed, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.
All 12 JustCall tools available for Mastra AI
When Mastra AI connects to JustCall through Vinkius, your AI agent gets direct access to every tool listed below — spanning cloud-phone, sms-messaging, call-logging, and more. Every call runs in a secure, isolated environment with full audit visibility. Beyond a simple connection, you get real-time monitoring of agent activity, enterprise governance, and optimized token usage.
Create contact on JustCall
Create a new contact
Get account profile on JustCall
Get my profile
Get call details on JustCall
Get call details
Get contact on JustCall
Get contact details
Get message details on JustCall
Get message details
List account numbers on JustCall
List JustCall numbers
List calls on JustCall
List phone calls
List contacts on JustCall
List phone contacts
List messages on JustCall
List SMS/MMS messages
List team users on JustCall
List team members
List webhooks on JustCall
List active webhooks
Send message on JustCall
Send SMS/MMS
Connect JustCall to Mastra AI via MCP
Follow these steps to wire JustCall into Mastra AI. The entire setup takes under two minutes — your credentials stay safe behind Vinkius.
Install dependencies
npm install @mastra/core @mastra/mcp @ai-sdk/openaiReplace the token
[YOUR_TOKEN_HERE] with your Vinkius tokenRun the agent
agent.ts and run with npx tsx agent.tsExplore tools
Why Use Mastra AI with the JustCall MCP Server
Mastra AI provides unique advantages when paired with JustCall through the Model Context Protocol.
Mastra's agent abstraction provides a clean separation between LLM logic and tool infrastructure. add JustCall without touching business code
Built-in workflow engine chains MCP tool calls with conditional logic, retries, and parallel execution for complex automation
TypeScript-native: full type inference for every JustCall tool response with IDE autocomplete and compile-time checks
One-command deployment to any Node.js host. Vercel, Railway, Fly.io, or your own infrastructure
JustCall + Mastra AI Use Cases
Practical scenarios where Mastra AI combined with the JustCall MCP Server delivers measurable value.
Automated workflows: build multi-step agents that query JustCall, process results, and trigger downstream actions in a typed pipeline
SaaS integrations: embed JustCall as a first-class tool in your product's AI features with Mastra's clean agent API
Background jobs: schedule Mastra agents to query JustCall on a cron and store results in your database automatically
Multi-agent systems: create specialist agents that collaborate using JustCall tools alongside other MCP servers
Example Prompts for JustCall in Mastra AI
Ready-to-use prompts you can give your Mastra AI agent to start working with JustCall immediately.
"Show today's call log and send a follow-up SMS to the last caller."
"List all agents, their call volumes, and available phone numbers."
"Show call recordings from this week and the contact database."
Troubleshooting JustCall MCP Server with Mastra AI
Common issues when connecting JustCall to Mastra AI through Vinkius, and how to resolve them.
createMCPClient not exported
npm install @mastra/mcpJustCall + Mastra AI FAQ
Common questions about integrating JustCall MCP Server with Mastra AI.
How does Mastra AI connect to MCP servers?
MCPClient with the server URL and pass it to your agent. Mastra discovers all tools and makes them available with full TypeScript types.Can Mastra agents use tools from multiple servers?
Does Mastra support workflow orchestration?
Explore More MCP Servers
View all →
Smithsonian Open Access
3 toolsExplore millions of museum records, images, and digital assets from the Smithsonian Institution's vast collections.
Prefect
7 toolsBring your data orchestration into your AI — audit Python pipelines, debug failed runs, and inspect Prefect Work Pools natively.
Mercury
10 toolsEquip your AI agent with direct access to Mercury — check account balances, review transactions, and manage recipients without opening the banking dashboard.
Argo Workflows
6 toolsAutomate Kubernetes orchestrations via Argo Workflows — monitor, list, and inspect active pods, crons, and workflow templates directly from any AI agent.