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How to connect Harvey with ChatGPT

Connect ChatGPT to Harvey MCP. List recent audit logs for your organization, find client matters updated this week, and more using natural language, with authentication handled for you.

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Harvey is a legal AI platform for managing client matters, documents, intake, and audit logs. It helps legal teams organize case work and review activity in one secure workspace.

35 Tools

How to connect Harvey MCP with ChatGPT

ChatGPT can take action across your apps and files, stay with a project for hours, and turn a goal into finished materials like sheets, slides, and docs, not just answers.

In this guide, I will explain the easiest and most secure way to connect your Harvey account to ChatGPT via Composio Connect, so it can review client matters, search Vault documents, manage intake, inspect audit logs, and track usage through natural language commands without ever putting your account credentials at risk.

Also integrate Harvey with

Claude CoworkHermesAtomic Agent

Why use Composio over default connectors?

  • Apps with read and write access. Default connectors mostly can read your data. Composio's Harvey integration lets ChatGPT take actions like creating drafts, sending updates, labeling records, and more.
  • 1,500+ SaaS toolkits out of the box. Composio gives you instant access to a vast catalog of pre-built connectors, from Gmail and Slack to Notion, Linear, and Salesforce.
  • One MCP server for every app. Connect any of your applications on demand through a single endpoint, rather than juggling a separate server for each app.
  • Smart, context-aware tool loading. Unlike traditional MCP servers that dump every available tool into the LLM context window, Composio searches for and loads only the tools relevant to the task at hand.
  • Cross-app automation. Chain actions across multiple apps in a single run - fetch a thread, summarize it in Notion, and post highlights to Slack without leaving the conversation.

Prerequisites

Note: Composio connects through OAuth. You will be asked to sign in and approve specific permissions. Review the permission screen carefully if you are using a work account.

Step-by-step: Connect Harvey to ChatGPT

1. Install the Composio plugin

Click the button. ChatGPT opens the Composio plugin page. Click Install plugin.

Install in ChatGPT

Composio plugin page in ChatGPT with the Install plugin button

You can also find it inside ChatGPT: go to Settings, open Plugins, search the marketplace for Composio, and click Install plugin.

2. Authenticate

After you install, ChatGPT asks you to authenticate with Composio. Log in and click Allow access to authorize ChatGPT to use your Composio account.

Composio login and Allow access screen for ChatGPT

3. Start using Composio

That is it. Composio tools are now available in ChatGPT. Type @Composio followed by your request, for example @Composio find unread Harvey messages and summarize them, and it will run the actions you authorize. On first use it asks you to authorize Harvey.

Option 2: Add Composio as an MCP server

If you cannot use the plugin marketplace, add Composio as a custom MCP server instead.

1. Open the MCP settings

In ChatGPT, go to Settings and open the Plugins section. Inside the Plugins page, click the MCP tab.

ChatGPT settings showing the Plugins page with the MCP tab selected

2. Add the server

Click Add server. In the Name field enter Composio, for Type select Streamable HTTP, and in the URL field paste the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
ChatGPT Add server dialog with the name Composio, type Streamable HTTP, and the Composio MCP URL

Then click Save. The Composio server now appears in your MCP plugins list.

ChatGPT Plugins page showing the Composio MCP server added to the list

3. Authenticate

Click Authenticate on the Composio entry, log in via Composio, and click Allow access. Composio tools are then available in ChatGPT the same way as with the plugin.

What you can do after connecting Harvey

  • List recent audit logs for your organization
  • Find client matters updated this week
  • Search Vault for signed engagement letters

Security + privacy notes (important)

  • Use least-privilege access: Only grant permissions you actually need.
  • Review OAuth permissions before approving: Make sure requested scopes match what you expect Composio and ChatGPT to do.
  • Keep write actions human-reviewed: For actions like sending messages, creating labels, or editing drafts, keep manual confirmation enabled.
  • Be careful with sensitive data: Avoid using this setup with highly sensitive information unless allowed by your personal, company, or client policies.
TOOLS

Supported Tools

Every Harvey action and event your agent gets out of the box.

Add Review Table Row

Add one processed file or a group of processed files to a Harvey review table and schedule asynchronous review processing.

Create Agent Thread

Start an asynchronous Harvey agent run from a prompt and optional documents.

Create Assistant Completion

Generate one non-streaming Harvey Assistant response from a prompt with optional documents or knowledge sources, matter attribution, model selection, and citations.

Create History File Download URLs

Create time-limited pre-signed download URLs for file IDs returned by Harvey query-history exports.

Create Intake Request

Submit an idempotent request and optional documents to the Harvey Intake queue.

Create Vault Project

Create a Harvey Vault project or knowledge base, optionally attributed to a client matter.

Delete Matters

Idempotently soft-delete 1 to 10,000 Harvey matters by firm client and matter identifiers.

Delete Vault File

Permanently delete one file from a Harvey Vault project.

Delete Vault Project

Move an entire Harvey Vault project and all its contents to the workspace recycle bin.

Export Query History

Export enriched query history for a UTC epoch window of at most 30 days, optionally including related file IDs.

Export Usage History

Export enriched Harvey workspace usage events for a UTC epoch range of at most 30 days, optionally including related file IDs.

Get Agent

Return metadata for one reachable published Harvey agent.

Get Agent Thread

Read one Harvey agent thread status and any available answer, citations, generated files, or error.

Get Current User

Return the Harvey service-user identity associated with the connected API token.

Get Earliest Audit Log

Return the earliest available Harvey audit log, optionally filtered by log type.

Get Intake Request

Read one Harvey Intake request's lifecycle state, assignment, timestamps, and attachments.

Get Latest Audit Log

Return the latest available Harvey audit log, optionally for one log type.

Get Review Table

Return a Harvey review table's title, creation time, and associated file IDs.

Get Review Table Row

Return a Harvey review-table row and its cell results for one file.

Get Vault Files

Return details and processing status for up to 1,000 Harvey Vault file IDs.

Get Vault Project

Return a Harvey Vault project's metadata, file identifiers and names, review tables, and storage limits.

List Agents

List published Harvey agents available to the connected service user, one cursor page at a time.

List Audit Logs

Page forward through Harvey audit logs from a starting log ID, optionally filtered by log type.

List Client Matters

Return all Harvey client matters, including deleted records and usage statistics.

List Recycled Vault Projects

List Vault projects currently in the workspace recycle bin, optionally filtered by project-name text or client matter.

List Vault Project Files

List, filter, and sort files in a Harvey Vault project, one cursor page at a time.

List Vault Projects

List and filter workspace Vault projects and knowledge bases, one page at a time.

List Vault Project Users

List workspace users with direct or inherited effective access to a Harvey Vault project.

Remove Vault Project Users

Remove direct WORKSPACE_USER shares from a Harvey Vault project by email.

Search Audit Logs by Time

Return the first Harvey audit log at or after a UTC epoch timestamp, optionally filtered by log type.

Search Vault

Return semantically relevant document chunks from one Harvey Vault project.

Update Vault Project Users

Add workspace users or update their direct access level on a Harvey Vault project.

Upload Vault Files

Upload up to 50 new or replacement files to a Harvey Vault project.

Upsert Clients

Create, update, or restore up to 10,000 Harvey clients by firm client identifier.

Upsert Matters

Create, update, or restore up to 10,000 Harvey matters under existing clients.

FRAMEWORKS

How to build Harvey MCP Agent with another framework

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Claude Cowork

Use Harvey MCP with Claude Cowork

Hermes logo

Hermes

Use Harvey MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Harvey MCP with Atomic Agent

FAQ

Frequently asked questions

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

Yes, you can. ChatGPT 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 Harvey tools.

Yes, absolutely. You can configure which Harvey 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.

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 Harvey data and credentials are handled as safely as possible.

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