Harvey
Connects ChatGPT to Harvey for legal questions, searches over your firm's Vaults and research in specialist sources.
What Harvey can do in ChatGPT
Legal answers and firm knowledge, read-only.
Legal Questions
Get answers grounded in Harvey's legal knowledge.
Vault Search
Search and analyse your firm's saved work.
Specialist Sources
Research UK tax legislation and HMRC manuals.
Source Discovery
List the Vaults and sources you can use.
Permission Aware
Stays within your Harvey access rights.
You stay in control
You approve access, and you can disconnect Harvey at any time.
Apps 1
What Harvey does in ChatGPT
The Harvey plugin connects ChatGPT to Harvey, a legal AI platform. It does three things: answers general legal questions using Harvey's legal knowledge, searches and analyses your firm's Vault projects, and runs targeted research in specialist knowledge sources chosen for the question.
Vaults hold saved work such as memos and earlier documents, so you can find your most recently updated ones or ask questions across them. Specialist sources include UK tax legislation and HMRC manuals. Discovery tools list the Vaults and knowledge sources you can use.
All tools are read-only and stay within your Harvey permissions, so you only see what your account already allows. You need a Harvey account with an active license, and your workspace admin has to switch on the MCP feature before the plugin will work.
Who it is for
- Lawyers at firms using Harvey
- In-house legal teams
- Tax lawyers researching UK rules
How to add Harvey to ChatGPT
- Open the Harvey listing in ChatGPT ↗.
- Click Install plugin.
- Sign in to your Harvey account when asked and approve the access it requests.
- Start a chat and ask for what you need, mentioning Harvey if ChatGPT does not pick it up.
- To stop, disconnect Harvey under apps in your ChatGPT settings.
Questions about Harvey
What is the Harvey ChatGPT plugin?
The Harvey plugin connects ChatGPT to Harvey, a legal AI platform. It does three things: answers general legal questions using Harvey's legal knowledge, searches and analyses your firm's Vault projects, and runs targeted research in specialist knowledge sources chosen for the question. It is listed in ChatGPT's plugin marketplace under Business & Operations.
What can I ask Harvey to do in ChatGPT?
For example: "What are the elements of a breach of contract claim, and the usual defences?", "Find my most recently updated Vaults", "Using the UK Tax source, what is HMRC's guidance on capital gains for non-residents?".
Who makes the Harvey plugin for ChatGPT?
The ChatGPT listing names Harvey as the developer. The version listed on 8 October 2026 was 1.0.0.
How do I add Harvey to ChatGPT?
Open the Harvey listing in ChatGPT, click Install plugin, sign in to your Harvey account and approve the access it asks for. Then ask for what you need in a chat, mentioning Harvey if ChatGPT does not pick it up.
Can Harvey change things in my account, or only read?
It reads Harvey's legal knowledge, your firm's Vault projects and specialist sources, all read-only and within your Harvey permissions.
Who is the Harvey plugin for?
Lawyers at firms using Harvey, in-house legal teams and tax lawyers researching UK rules.
What do I need to use Harvey in ChatGPT?
A Harvey account with an active license, and your workspace admin must enable the MCP feature.
Can Harvey edit documents in my Vaults?
No. The listing says all tools are read-only.
Does Harvey see my ChatGPT chats?
When Harvey is connected, ChatGPT may share the parts of your chats and memories that matter for a request with Harvey. What Harvey does with that data falls under its own terms and privacy policy. ChatGPT keeps your training-data settings, and you can disconnect at any time.
How do I disconnect Harvey from ChatGPT?
Open your ChatGPT settings, go to apps, and disconnect Harvey. You can reconnect later from the listing.
What are alternatives to Harvey in ChatGPT?
Similar plugins in the ChatGPT marketplace include Skills, Able SEO by VibeSEO and Ballpark. Each has its own page in this directory.
Privacy and your data
When Harvey is connected, ChatGPT may share the parts of your chats and memories that matter for a request with Harvey. What Harvey then does with that data falls under its own terms and privacy policy, not only OpenAI's. ChatGPT keeps your training-data settings for data that comes from connected apps, and you can disconnect at any time.
Harvey privacy policy ↗Harvey terms ↗OpenAI: apps in ChatGPT ↗