How to Use the JustCall MCP in Google ADK

Q: How do I limit which tools the agent sees?

Use the optional toolnames filter when setting up the McpToolset. You can restrict access to just listcontacts and getcontact if you only want it handling identity verification.

Connect JustCall directly to Google ADK to feed millions of tokens of call logs and SMS data into Gemini.

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Connect JustCall MCP to Google ADK

Create your Vinkius account to connect JustCall to Google ADK 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 Google ADK

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Feed Google ADK massive context

The `justcall-mcp` feeds raw telemarketing data directly into Gemini's massive context window. Your agent pulls historical interactions using `list_calls` and `list_messages` to build a complete timeline of a customer relationship. Gemini processes the entire history at once instead of chunking data. You execute `get_contact` to grab metadata. Then you dump months of associated SMS transcripts into the prompt for deep reasoning against your BigQuery records.

Audit telemarketing campaigns

This JustCall integration gives enterprise deployments visibility into dialer performance. Your agent uses `list_campaigns` to pull active outreach efforts and cross-references that data with `list_users` to map performance to specific agents. You pass the McpToolset directly to your LlmAgent initialization. The agent can identify available routing options by checking `list_numbers` and output the analysis straight to Vertex AI.

Investigate specific events

This MCP Server lets support teams pull exact details from a bad interaction. The agent runs `get_call` to pull participant timestamps and notes. It follows up with `list_recordings` to grab the actual audio file reference. This setup avoids writing custom API wrappers. You filter the exposed tools using the tool_names parameter. That restricts the agent to read-only investigation tasks while it runs on Google Cloud infrastructure.

Setup guide

Set up JustCall MCP in Google ADK

Prerequisites

Python 3.10+ installed
google-adk package (pip install google-adk)
Active Vinkius subscription with a valid endpoint token

1

Install Google ADK

Run pip install google-adk to install the Agent Development Kit. MCP support is included via the McpToolset class.
2

Connect via SSE transport

Use McpToolset.from_server() with SseServerParams pointing to your Vinkius endpoint. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Create an LlmAgent

Pass the returned mcp_tools list directly to LlmAgent(tools=mcp_tools). The ADK maps each MCP tool to a native Gemini function call — no manual schema definitions required.
4

Run with any Gemini model

The agent works with any Gemini model (gemini-2.0-flash, gemini-2.5-pro, etc.). Copy the full example on the right to get started with JustCall tools in your ADK agent.

agent.py

from google.adk.agents import LlmAgent
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import SseServerParams

# Connect to the MCP via SSE
mcp_tools, exit_stack = await McpToolset.from_server(
    connection_params=SseServerParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    )
)

# Create your agent with auto-discovered tools
agent = LlmAgent(
    name="JustCall_agent",
    model="gemini-2.0-flash",
    instruction="You have access to JustCall tools via MCP.",
    tools=mcp_tools,
)

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Common questions about JustCall MCP in Google ADK

Install google-adk and initialize an McpToolset using StreamableHttpServerParameters with your endpoint URL. Pass the toolset into your LlmAgent tools list.

The MCP Server provides the metadata and file references via list_recordings. Your Gemini agent takes those URLs and processes the audio if your pipeline supports multimodal ingestion.

Use the optional tool_names filter when setting up the McpToolset. You can restrict access to just list_contacts and get_contact if you only want it handling identity verification.

That is the primary advantage. You can pull thousands of text interactions via list_messages and feed them directly into the agent without hitting token limits.

The server queries raw email addresses and phone numbers from your contact lists. Vinkius routes this traffic through an ephemeral zero-trust architecture. No customer metadata ever touches persistent disk storage.

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