# How to integrate Harvest MCP with Hermes

```json
{
  "title": "How to integrate Harvest MCP with Hermes",
  "toolkit": "Harvest",
  "toolkit_slug": "harvest",
  "framework": "Hermes",
  "framework_slug": "hermes-agent",
  "url": "https://composio.dev/toolkits/harvest/framework/hermes-agent",
  "markdown_url": "https://composio.dev/toolkits/harvest/framework/hermes-agent.md",
  "updated_at": "2026-05-06T08:15:08.988Z"
}
```

## Introduction

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.
This guide explains the easiest and most robust way to connect your Harvest account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

## Also integrate Harvest with

- [OpenAI Agents SDK](https://composio.dev/toolkits/harvest/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/harvest/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/harvest/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/harvest/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/harvest/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/harvest/framework/openclaw)
- [CLI](https://composio.dev/toolkits/harvest/framework/cli)
- [Google ADK](https://composio.dev/toolkits/harvest/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/harvest/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/harvest/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/harvest/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/harvest/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/harvest/framework/crew-ai)

## TL;DR

### What is Composio Connect?
Composio Connect is a consumer offering that lets anyone plug 1,000+ applications directly into their agent harness — including Hermes. It can:
- Search and load tools from relevant toolkits on-demand, reducing context usage.
- Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
- Manage app authentication end-to-end with zero manual overhead.

## Connect Harvest to Hermes

### Integrating Harvest with Hermes
### Using Composio Connect CLI
1. Install the Composio CLI
Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

```bash
curl -fsSL https://composio.dev/install | bash
```

## What is the Harvest MCP server, and what's possible with it?

The Harvest MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Harvest account. It provides structured and secure access to your time-tracking, invoicing, and project management data, so your agent can create clients, log expenses, send invoices, record payments, and manage estimates automatically on your behalf.
- Client and contact management: Seamlessly create new clients and add contacts to keep your client list up to date without manual entry.
- Estimate creation and communication: Automatically generate new estimates, categorize line items, and send estimate messages or updates to clients.
- Expense tracking automation: Log new expense entries against projects, ensuring accurate financial records and effortless cost tracking.
- Streamlined invoicing and payments: Create professional invoices, categorize invoice items, send invoice notifications, and record payments as soon as they happen.
- Project financial workflow optimization: Let your agent handle the full cycle—from creating clients to sending invoices and tracking payments—saving your team valuable time and reducing errors.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `HARVEST_CREATE_CLIENT` | Create Client | Tool to create a new client. use after gathering client details to register a new client in harvest. |
| `HARVEST_CREATE_CLIENT_CONTACT` | Create Client Contact | Tool to create a new client contact. use when you need to add a contact under an existing client. call after you've retrieved or confirmed the client id. |
| `HARVEST_CREATE_ESTIMATE` | Create Estimate | Tool to create a new estimate. use after gathering client and line item details. |
| `HARVEST_CREATE_ESTIMATE_ITEM_CATEGORY` | Create Estimate Item Category | Tool to create a new estimate item category in harvest. use after deciding to categorize line items within an estimate. |
| `HARVEST_CREATE_ESTIMATE_MESSAGE` | Create Estimate Message | Tool to create a new message for an estimate. use when you have an estimate id and want to send a message or run an event (send, accept, decline, re-open) on the estimate. |
| `HARVEST_CREATE_EXPENSE` | Create Expense | Tool to create a new expense entry. use when recording costs against projects. ensure either units or total cost is provided. |
| `HARVEST_CREATE_INVOICE` | Create Invoice | Tool to create a new invoice. use when you have gathered all invoice details and need to bill a client in harvest. |
| `HARVEST_CREATE_INVOICE_ITEM_CATEGORY` | Create Invoice Item Category | Tool to create a new invoice item category. use after you have decided on the category name to register it in harvest. |
| `HARVEST_CREATE_INVOICE_MESSAGE` | Create Invoice Message | Tool to create a new message for an invoice. use after confirming the invoice id when you need to notify a client with invoice details. |
| `HARVEST_CREATE_INVOICE_PAYMENT` | Create Invoice Payment | Tool to create a new payment on an invoice. use when recording a payment against an existing invoice. |
| `HARVEST_CREATE_PROJECT` | Create Project | Tool to create a new project. use after confirming the client exists. |
| `HARVEST_CREATE_TASK` | Create Task | Tool to create a new task. use after identifying task details to register it in harvest. |
| `HARVEST_CREATE_TIME_ENTRY` | Create Time Entry | Tool to create a new time entry. use when logging hours for a project by specifying start/end times or duration. |
| `HARVEST_CREATE_USER` | Create User | Tool to create a new user. use after gathering user details to invite them to harvest. |
| `HARVEST_DELETE_CLIENT` | Delete Client | Tool to delete a client. use when you need to remove a client that has no associated projects, invoices, or estimates. call after confirming the client id exists and has no dependent resources. |
| `HARVEST_DELETE_CLIENT_CONTACT` | Delete Client Contact | Tool to delete a client contact. use when you need to remove a contact that is no longer relevant. call after confirming the contact id exists. |
| `HARVEST_DELETE_ESTIMATE` | Delete Estimate | Tool to delete an estimate. use when you need to remove an estimate that is no longer needed. call after confirming the estimate id exists and has no dependent resources. |
| `HARVEST_DELETE_ESTIMATE_MESSAGE` | Delete Estimate Message | Tool to delete an estimate message. use when you need to remove a message from an estimate. call after confirming estimate id and message id are correct. |
| `HARVEST_DELETE_INVOICE` | Delete Invoice | Tool to delete an invoice. use when you need to remove an invoice that has no associated payments. call after confirming the invoice id exists. |
| `HARVEST_DELETE_INVOICE_ITEM_CATEGORY` | Delete Invoice Item Category | Tool to delete an invoice item category. use when you need to remove an obsolete or incorrect invoice item category. call after confirming the invoice item category id exists. |
| `HARVEST_DELETE_INVOICE_MESSAGE` | Delete Invoice Message | Tool to delete a message from an invoice. use when you need to remove a specific message that is no longer relevant. call after confirming the invoice id and message id. |
| `HARVEST_DELETE_INVOICE_PAYMENT` | Delete Invoice Payment | Tool to delete an invoice payment. use when you need to remove a payment from an invoice after confirming payment details. |
| `HARVEST_DELETE_PROJECT` | Delete Project | Tool to delete a project. use when you need to remove a project and all its associated time entries and expenses; invoices remain intact. call after confirming the project id exists. |
| `HARVEST_DELETE_TASK` | Delete Task | Tool to delete a task. use when you need to remove a task that has no associated time entries. call after confirming the task id exists and has no dependent time entries. |
| `HARVEST_DELETE_TIME_ENTRY` | Delete Time Entry | Tool to delete a time entry. use when removing an existing time entry that is deletable (not closed or on archived projects/tasks). call after confirming the time entry id exists. |
| `HARVEST_DELETE_USER` | Delete User | Tool to delete a user. use when you need to remove a user that has no associated time entries or expenses. call after confirming the user id exists and has no dependent time entries or expenses. |
| `HARVEST_GET_CLIENT` | Get Client | Tool to retrieve a specific client by id. use when you need details of a client before invoicing or reporting. |
| `HARVEST_GET_CLIENT_CONTACT` | Get Client Contact | Tool to retrieve a specific client contact. use when you have client id and contact id to fetch and verify contact details. |
| `HARVEST_GET_COMPANY_INFO` | Get Company Info | Tool to retrieve information about the authenticated user's company. use after authentication to fetch company settings for display or configuration. |
| `HARVEST_GET_ESTIMATE` | Get Estimate | Tool to retrieve a specific estimate by id. use after confirming the estimate id. example: "get estimate with id 123456". |
| `HARVEST_GET_INVOICE` | Get Invoice | Tool to retrieve a specific invoice by id. use when you need the full details of an invoice after selecting or creating it. example: 'get invoice with id 13150378.' |
| `HARVEST_GET_PROJECT` | Get Project | Tool to retrieve a specific harvest project by id. use when you have a project id and need its details. |
| `HARVEST_GET_TASK` | Get Task | Tool to retrieve a specific task by id. use when you have a task id and need its detailed information. |
| `HARVEST_GET_TIME_ENTRY` | Get Time Entry | Tool to retrieve a single time entry by id. use when you have a specific time entry id and need its full details. |
| `HARVEST_GET_USER` | Get User | Tool to retrieve a specific user by id. use after obtaining a valid user id (for example via list users). example: "get details of user 3230547". |
| `HARVEST_LIST_CLIENT_CONTACTS` | List Client Contacts | Tool to list client contacts. use when you need to retrieve contacts with optional filtering and pagination. |
| `HARVEST_LIST_CLIENTS` | List Clients | Tool to list clients. use when you need to retrieve a paginated list of clients from harvest. ensure you have a valid access token in metadata before calling. |
| `HARVEST_LIST_ESTIMATE_MESSAGES` | List Estimate Messages | Tool to list messages for an estimate. use after obtaining an estimate id to retrieve associated messages, supports pagination and filtering by update time. |
| `HARVEST_LIST_EXPENSE_CATEGORIES` | List Expense Categories | Tool to list expense categories. use when you need to retrieve a paginated list of expense categories, optionally filtering by active status or last update timestamp. |
| `HARVEST_LIST_INVOICE_ITEM_CATEGORIES` | List Invoice Item Categories | Tool to retrieve invoice item categories. use when you need to fetch a paginated list of invoice item categories in harvest. |
| `HARVEST_LIST_INVOICE_MESSAGES` | List Invoice Messages | Tool to list messages associated with a given invoice. use when you need to retrieve invoice messages with optional filtering by update time and pagination. |
| `HARVEST_LIST_INVOICE_PAYMENTS` | List Invoice Payments | Tool to retrieve payments for a specific invoice. use when you need to list all payments applied to an invoice after confirming the invoice exists. |
| `HARVEST_LIST_INVOICES` | List Invoices | Tool to list invoices. use when you need to retrieve invoices filtered by client, project, date range, or state. example: 'list invoices for client 5735776 from 2023-01-01 to 2023-01-31.' |
| `HARVEST_LIST_PROJECTS` | List projects | Tool to list projects. use when you need to retrieve a paginated list of projects from harvest. ensure a valid access token is present in metadata before calling. |
| `HARVEST_LIST_TASKS` | List Tasks | Tool to list tasks. use when you need to retrieve a paginated list of tasks from harvest. ensure you have a valid access token in metadata before calling. |
| `HARVEST_LIST_TIME_ENTRIES` | List Time Entries | Tool to retrieve a list of time entries. use when you need to fetch tracked hours with filters or date ranges for reporting or invoicing. example: "list time entries for project 123 between 2023-01-01 and 2023-01-31". |
| `HARVEST_LIST_USERS` | List Users | Tool to list users. use when you need to retrieve a paginated list of users from harvest. |
| `HARVEST_UPDATE_CLIENT` | Update Client | Tool to update an existing client. use after retrieving client details to modify its properties. supports partial updates; omit fields to leave them unchanged. |
| `HARVEST_UPDATE_CLIENT_CONTACT` | Update Client Contact | Tool to update a client contact. use when you have a contact id and need to modify its details. |
| `HARVEST_UPDATE_COMPANY_INFO` | Update Company Info | Tool to update information about the company. use to modify company settings such as name, timezone, or formatting options. use after obtaining current settings to apply changes. |
| `HARVEST_UPDATE_ESTIMATE` | Update Estimate | Tool to update an existing estimate. use when you need to modify specific fields of an estimate; omit parameters to leave other fields unchanged. |
| `HARVEST_UPDATE_ESTIMATE_ITEM_CATEGORY` | Update Estimate Item Category | Tool to update an estimate item category. use after retrieving the category to change its name. |
| `HARVEST_UPDATE_EXPENSE` | Update Expense | Tool to update an existing expense. use after retrieving an expense to modify project, category, date, cost, or delete a receipt; omit fields to leave unchanged. |
| `HARVEST_UPDATE_INVOICE` | Update Invoice | Tool to update an existing invoice. use after retrieving invoice details to modify its fields. supports partial updates; omit fields to leave unchanged. |
| `HARVEST_UPDATE_PROJECT` | Update Project | Tool to update an existing project. use when you need to modify one or more fields of a project by its id. invoke after confirming the project id and desired changes. |
| `HARVEST_UPDATE_TASK` | Update Task | Tool to update an existing task. use after retrieving task details to modify its attributes such as name, billing defaults, or status. supports partial updates; omit fields to leave them unchanged. |
| `HARVEST_UPDATE_TIME_ENTRY` | Update Time Entry | Tool to update an existing time entry. use after retrieving the entry to adjust hours, notes, project, or task details. supports partial updates; omit fields to leave unchanged. |
| `HARVEST_UPDATE_USER` | Update User | Tool to update an existing user. use when you need to modify a user's profile or settings after confirming the user id. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

The Harvest MCP server provides comprehensive access to Harvest operations through Composio. Once connected, Hermes can perform all major Harvest actions on your behalf using natural language commands.

## Complete Code

None listed.

## Conclusion

### Way Forward
With Harvest connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.
From here, you can extend Hermes further:
- Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
- Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
- Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.
If you run into trouble or want to share what you've built, join the [community](https://discord.com/invite/composio) or check out the [Docs](https://docs.composio.dev?utm_source=toolkits&utm_medium=framework_template&utm_campaign=hermes&utm_content=docs) for deeper configuration options.

## How to build Harvest MCP Agent with another framework

- [OpenAI Agents SDK](https://composio.dev/toolkits/harvest/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/harvest/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/harvest/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/harvest/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/harvest/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/harvest/framework/openclaw)
- [CLI](https://composio.dev/toolkits/harvest/framework/cli)
- [Google ADK](https://composio.dev/toolkits/harvest/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/harvest/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/harvest/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/harvest/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/harvest/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/harvest/framework/crew-ai)

## Related Toolkits

- [Google Sheets](https://composio.dev/toolkits/googlesheets) - Google Sheets is a cloud-based spreadsheet tool for real-time collaboration and data analysis. It lets teams work together from anywhere, updating information instantly.
- [Notion](https://composio.dev/toolkits/notion) - Notion is a collaborative workspace for notes, docs, wikis, and tasks. It streamlines team knowledge, project tracking, and workflow customization in one place.
- [Airtable](https://composio.dev/toolkits/airtable) - Airtable combines the flexibility of spreadsheets with the power of a database for easy project and data management. Teams use Airtable to organize, track, and collaborate with custom views and automations.
- [Asana](https://composio.dev/toolkits/asana) - Asana is a collaborative work management platform for teams to organize and track projects. It streamlines teamwork, boosts productivity, and keeps everyone aligned on goals.
- [Google Tasks](https://composio.dev/toolkits/googletasks) - Google Tasks is a to-do list and task management tool integrated into Gmail and Google Calendar. It helps you organize, track, and complete tasks across your Google ecosystem.
- [Linear](https://composio.dev/toolkits/linear) - Linear is a modern issue tracking and project planning tool for fast-moving teams. It helps streamline workflows, organize projects, and boost productivity.
- [Jira](https://composio.dev/toolkits/jira) - Jira is Atlassian’s platform for bug tracking, issue tracking, and agile project management. It helps teams organize work, prioritize tasks, and deliver projects efficiently.
- [Clickup](https://composio.dev/toolkits/clickup) - ClickUp is an all-in-one productivity platform for managing tasks, docs, goals, and team collaboration. It streamlines project workflows so teams can work smarter and stay organized in one place.
- [Monday](https://composio.dev/toolkits/monday) - Monday.com is a customizable work management platform for project planning and collaboration. It helps teams organize tasks, automate workflows, and track progress in real time.
- [Addressfinder](https://composio.dev/toolkits/addressfinder) - Addressfinder is a data quality platform for verifying addresses, emails, and phone numbers. It helps you ensure accurate customer and contact data every time.
- [Agiled](https://composio.dev/toolkits/agiled) - Agiled is an all-in-one business management platform for CRM, projects, and finance. It helps you streamline workflows, consolidate client data, and manage business processes in one place.
- [Ascora](https://composio.dev/toolkits/ascora) - Ascora is a cloud-based field service management platform for service businesses. It streamlines scheduling, invoicing, and customer operations in one place.
- [Basecamp](https://composio.dev/toolkits/basecamp) - Basecamp is a project management and team collaboration tool by 37signals. It helps teams organize tasks, share files, and communicate efficiently in one place.
- [Beeminder](https://composio.dev/toolkits/beeminder) - Beeminder is an online goal-tracking platform that uses monetary pledges to keep you motivated. Stay accountable and hit your targets with real financial incentives.
- [Boxhero](https://composio.dev/toolkits/boxhero) - Boxhero is a cloud-based inventory management platform for SMBs, offering real-time updates, barcode scanning, and team collaboration. It helps businesses streamline stock tracking and analytics for smarter inventory decisions.
- [Breathe HR](https://composio.dev/toolkits/breathehr) - Breathe HR is cloud-based HR software for SMEs to manage employee data, absences, and performance. It simplifies HR admin, making it easy to keep employee records accurate and up to date.
- [Breeze](https://composio.dev/toolkits/breeze) - Breeze is a project management platform designed to help teams plan, track, and collaborate on projects. It streamlines workflows and keeps everyone on the same page.
- [Bugherd](https://composio.dev/toolkits/bugherd) - Bugherd is a visual feedback and bug tracking tool for websites. It helps teams and clients report website issues directly on live sites for faster fixes.
- [Canny](https://composio.dev/toolkits/canny) - Canny is a platform for managing customer feedback and feature requests. It helps teams prioritize product decisions based on real user insights.
- [Chmeetings](https://composio.dev/toolkits/chmeetings) - Chmeetings is a church management platform for events, members, donations, and volunteers. It streamlines church operations and improves community engagement.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Harvest MCP?

With a standalone Harvest MCP server, the agents and LLMs can only access a fixed set of Harvest tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Harvest and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Hermes?

Yes, you can. Hermes fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Harvest tools.

### Can I manage the permissions and scopes for Harvest while using Tool Router?

Yes, absolutely. You can configure which Harvest scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

### How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Harvest data and credentials are handled as safely as possible.

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