Harvey MCP Server

Provider-hosted MCP server that exposes Harvey's legal AI capabilities (legal Q&A, Vault document analysis, and curated research knowledge sources) to MCP clients.

Legal by Harvey AI OAuth2 active

Connect (Remote Server) Docs

Overview

Harvey is an AI platform built for legal professionals. The Harvey MCP server gives AI assistants secure, permission-scoped access to Harvey's core capabilities through the Model Context Protocol, an open standard for connecting AI tools to external data and services. Instead of building one-off integrations, MCP clients like Claude Web and Claude Desktop can call Harvey's legal reasoning, Vault project analysis, and specialized research databases as standardized tools.

The server exposes five tools covering three main areas: general legal Q&A backed by Harvey's broad legal knowledge, querying specialized research knowledge sources (for example UK tax law databases), and asking questions about documents inside specific Vault projects the user has access to. The server is stateless. Each tool call is independent and the client manages multi-turn context. Permissions enforced at the Harvey account level carry through every call, so users only ever see data they are authorized to access.

Harvey hosts the server itself, so there is no self-hosting or code to clone. Connection is handled through the host client's connector or settings panel, with authentication completed in the browser against the user's Harvey account using OAuth 2.1 with PKCE. The server is intended for current Harvey customers whose firm has enabled the connector.

Tools

Tool	Description
`ask_harvey`	Ask a general legal question using Harvey's broad legal knowledge base.
`ask_with_knowledge_source`	Ask a question scoped to a specialized research knowledge source such as a jurisdiction or practice-area database.
`list_knowledge_sources`	List all research knowledge sources available to the authenticated user.
`list_vault_projects`	List all Vault projects the authenticated user can access.
`ask_about_vault`	Ask a question about the documents inside a specific Vault project.

Setup Guide

Prerequisites

An active Harvey account with access to the MCP connector (your firm admin may need to enable it)
An MCP-compatible client. Harvey's official documentation covers Claude Web and Claude Desktop

Setup in Claude Web

Open Settings, then Connectors
Search for "Harvey" and click Connect
Complete the browser OAuth flow using your Harvey credentials
Toggle the connector on for your chat sessions

Setup in Claude Desktop

Open Settings, then Connectors
Search for "Harvey", click Connect, and finish the OAuth flow in your browser

Manual configuration (for MCP clients that accept a remote URL)

For clients that support remote MCP servers via a URL field, the endpoint is:

{
  "mcpServers": {
    "harvey": {
      "url": "https://mcp.harvey.ai/mcp"
    }
  }
}

The client must support the MCP Authorization Specification with OAuth 2.1 + PKCE (S256), since the server enforces browser-based OAuth for every user. Refer to the official Harvey docs at developers.harvey.ai/guides/harvey_mcp for the latest connector behavior.

Use Cases

Ask general legal questions from inside an AI assistant and get Harvey-grounded answers instead of unverified model output
Query specialized research knowledge sources (for example UK tax law) without leaving the chat client
Pull a list of Vault projects the user can access and then ask targeted questions about the documents inside one
Use Harvey as a backing tool for an agentic workflow that combines legal research with other connectors such as document storage or email
Centralize permissions and audit trails for AI-driven legal queries across multiple client tools

Example Prompts

"Ask Harvey to summarize the key elements required to prove promissory estoppel under English law."
"List my available Harvey knowledge sources, then ask the UK tax source how IR35 applies to a personal service company."
"Show me all Vault projects I can access in Harvey."
"Using Vault project 8f3e..., find every clause that limits liability and quote the exact language."
"Ask Harvey what the standard governing-law options are for a SaaS MSA between a US vendor and an EU customer."

Pros

Official, provider-hosted server maintained by Harvey, no self-hosting required
Permissions and access controls are enforced per user against the existing Harvey account
Direct access to Harvey's curated research knowledge sources and Vault document analysis, not just generic web search
Implements the modern MCP Authorization spec with OAuth 2.1 + PKCE

Limitations

Requires a paid Harvey subscription and admin enrollment, not usable without an existing account
Limited public documentation on rate limits, scopes, and exact tool input schemas
Stateless design means the client is fully responsible for managing multi-turn context across Vault questions

Alternatives

iManage MCP Server for legal document management and DMS-grounded AI workflows
CourtListener MCP Server for open access to US case law and court data
Generic document RAG via providers like Pinecone or Ragie when you need legal-style retrieval without a Harvey subscription