How do I find my Harvest Access Token and Account ID?

Go to the **Harvest Developers** site (id.getharvest.com), navigate to **Personal Access Tokens**, and create a new token. You will find both the **token** and the **Account ID** listed there.

Can I see time entries for a specific period?

Yes! Use the `list_time_entries` tool and provide the `from` and `to` dates in YYYY-MM-DD format to retrieve records for that timeframe.

Is it possible to create invoices through this integration?

Yes, you can use the `create_invoice` tool by providing a `client_id` and an optional `subject` to generate a new invoice draft in your Harvest account.

Is the integration secure for managing financial data?

Absolutely. The integration uses official Harvest API tokens over HTTPS. Your credentials are encrypted and stored securely within the Vinkius Cloud infrastructure.

Harvest MCP Server for Google ADK 11 tools — connect in under 2 minutes

Name: Harvest
Availability: InStock
Author: Vinkius

google.github.io/adk-docs/tools/mcp-tools

Built by Vinkius GDPR 11 Tools SDK

Google Agent Development Kit (ADK) is Google's framework for building production AI agents. Add Harvest as an MCP tool provider through Vinkius and your ADK agents can call every tool with full schema introspection.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

from google.adk.agents import Agent
from google.adk.tools.mcp_tool import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import (
    StreamableHTTPConnectionParams,
)

# Your Vinkius token. get it at cloud.vinkius.com
mcp_tools = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    )
)

agent = Agent(
    model="gemini-2.5-pro",
    name="harvest_agent",
    instruction=(
        "You help users interact with Harvest "
        "using 11 available tools."
    ),
    tools=[mcp_tools],
)

Fully ManagedVinkius Servers

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Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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 Harvest MCP Server

Connect your Harvest account to any AI agent and take full control of your time tracking, client management, and invoicing through natural conversation.

Google ADK natively supports Harvest as an MCP tool provider. declare Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 11 tools with Gemini's long-context reasoning for complex multi-tool workflows, with production-ready session management and evaluation built in.

What you can do

Time Tracking Oversight — List and inspect tracked time entries to monitor team productivity.
Client Management — List all clients, create new ones, and update company details effortlessly.
Invoicing Automation — Access your invoice history, create new drafts, and manage billing statuses.
Project Monitoring — List all active projects and retrieve detailed information for each.
User Profile — Get information about the current authenticated user and account status.
Operational Efficiency — Use AI to identify unbilled time or upcoming invoice deadlines across your organization.

The Harvest MCP Server exposes 11 tools through the Vinkius. Connect it to Google ADK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Harvest to Google ADK via MCP

Follow these steps to integrate the Harvest MCP Server with Google ADK.

Install Google ADK

Run pip install google-adk

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Create the agent

Save the code above and integrate into your ADK workflow

Explore tools

The agent will discover 11 tools from Harvest via MCP

Why Use Google ADK with the Harvest MCP Server

Google ADK provides unique advantages when paired with Harvest through the Model Context Protocol.

Google ADK natively supports MCP tool servers. declare a tool provider and the framework handles discovery, validation, and execution

Built on Gemini models, ADK provides long-context reasoning ideal for complex multi-tool workflows with Harvest

Production-ready features like session management, evaluation, and deployment come built-in. not bolted on

Seamless integration with Google Cloud services means you can combine Harvest tools with BigQuery, Vertex AI, and Cloud Functions

Harvest + Google ADK Use Cases

Practical scenarios where Google ADK combined with the Harvest MCP Server delivers measurable value.

Enterprise data agents: ADK agents query Harvest and cross-reference results with internal databases for comprehensive analysis

Multi-modal workflows: combine Harvest tool responses with Gemini's vision and language capabilities in a single agent

Automated compliance checks: schedule ADK agents to query Harvest regularly and flag policy violations or configuration drift

Internal tool platforms: build self-service agent platforms where teams connect their own MCP servers including Harvest

Harvest MCP Tools for Google ADK (11)

These 11 tools become available when you connect Harvest to Google ADK via MCP:

create_client

Create a new client in Harvest

create_invoice

Create a new invoice for a client

delete_client

Permanently delete a client

get_client

Get detailed information for a specific client

get_invoice

Get details for a specific invoice

get_my_profile

Get information about the current authenticated user

list_clients

List all clients in your Harvest account

list_invoices

List all invoices, including drafts and sent ones

list_projects

List all projects in the account

list_time_entries

List tracked time entries

update_client

Update an existing client name

Example Prompts for Harvest in Google ADK

Ready-to-use prompts you can give your Google ADK agent to start working with Harvest immediately.

"List all time entries from last week."

"Create a new client named 'Acme Corp'."

"Show me all active projects."

Troubleshooting Harvest MCP Server with Google ADK

Common issues when connecting Harvest to Google ADK through the Vinkius, and how to resolve them.

McpToolset not found

Update: pip install --upgrade google-adk

Harvest + Google ADK FAQ

Common questions about integrating Harvest MCP Server with Google ADK.

How does Google ADK connect to MCP servers?

Import the MCP toolset class and pass the server URL. ADK discovers and registers all tools automatically, making them available to your agent's tool-use loop.

Can ADK agents use multiple MCP servers?

Yes. Declare multiple MCP tool providers in your agent configuration. ADK merges all tool schemas and the agent can call tools from any server in a single turn.

Which Gemini models work best with MCP tools?

Gemini 2.0 Flash and Pro models both support function calling required for MCP tools. Flash is recommended for latency-sensitive use cases, Pro for complex reasoning.