Harvey for ChatGPT: Plugin, Example Prompts & Reviews

Example prompts

3 from the official listing

Harvey What are the elements of a breach of contract claim, and what defenses are commonly raised?
Harvey Find my most recently updated Vaults in Harvey.
Harvey Using Harvey's UK Tax knowledge source, what is HMRC's guidance on capital gains for non-residents?

Mention Harvey by name in your message, as the official examples do.

How to use Harvey in ChatGPT

Open Harvey in ChatGPT’s plugin directory

Open Harvey’s page on chatgpt.com. Sign in to ChatGPT if you are not already.
Install it from that page

Choose Install plugin there. It adds the Harvey app to ChatGPT.
Mention Harvey in a chat

Start a new chat and name it in your request, for example: “Harvey, what are the elements of a breach of contract claim, and what defenses are commonly…”

Availability can depend on your ChatGPT plan, your region and, on work accounts, your admin’s settings.

What Harvey does

The Harvey plugin connects ChatGPT to Harvey's AI-powered legal intelligence platform. It supports three core capabilities: (1) General legal inquiries grounded in Harvey's legal knowledge; (2) Analysis and search over your firm's Vault projects — saved work product, memos, and prior documents; (3) Targeted research using specialized knowledge sources, such as UK Tax legislation and HMRC manuals. Discovery tools let users list available Vault projects and knowledge sources. All tools are read-only and operate strictly within the authenticated user's Harvey permissions. Access requires a Harvey account with an active license and the MCP feature enabled by your workspace admin.

From the official listing, written by Harvey.

What Harvey can access

The official listing names no Read or Write capability for Harvey. Check what it asks for when you add it, and connect only the accounts you want it to use.

Before you connect it

OpenAI’s plugin pages note that a connected plugin may receive relevant parts of your chats to answer a request, and that Harvey’s own terms and privacy policy then cover that data. You can disconnect a plugin later in ChatGPT’s settings. Read the privacy policy (harvey.ai) and terms (harvey.ai).

Harvey reviews

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Harvey in ChatGPT: questions and answers

What does Harvey do in ChatGPT?

The Harvey plugin connects ChatGPT to Harvey's AI-powered legal intelligence platform.

What can I ask Harvey in ChatGPT?

The official listing suggests prompts like: “What are the elements of a breach of contract claim, and what defenses are commonly raised?”; “Find my most recently updated Vaults in Harvey”; “Using Harvey's UK Tax knowledge source, what is HMRC's guidance on capital gains for non-residents?”.

How do I use Harvey in ChatGPT?

Open Harvey’s page in ChatGPT’s plugin directory on chatgpt.com and install it there. Then mention Harvey in a chat, for example: “What are the elements of a breach of contract claim, and what defenses are commonly raised?”.

Who makes the Harvey plugin?

Harvey, currently at version 1.0.0. Best GPT Apps is an independent directory and is not affiliated with OpenAI or Harvey.

Is Harvey one of the old ChatGPT plugins from 2023?

No. The 2023 ChatGPT plugins were a separate beta that OpenAI has since retired. Today’s ChatGPT plugins are the apps directory under a new name: since July 2026 a plugin can bundle apps, skills and MCP servers.