Clio MCP Server: Connect Claude to Clio Practice Management

Open-source Model Context Protocol (MCP) connector that lets Claude read live data from Clio — matters, contacts, documents, tasks, calendar, and billing — without copying client information into chat windows. Built for law firms that care about attorney-client privilege, ABA Opinion 512 compliance, and keeping AI workflows inside their existing practice management stack.

TL;DR — 15 Clio tools exposed to Claude. Audit-logged for ABA Opinion 512. OAuth tokens encrypted at rest with AES-256-GCM. Local-only — no relay server, no cloud middleman. MIT license, free forever.

Who this is for: Law firm IT, legal operations teams, tech-forward partners, and engineers at legal tech companies. If you can follow a six-step terminal install, you can use this.

Who this is NOT for (yet): Attorneys who've never opened a terminal. A simpler one-command installer is planned for v0.2. In the meantime, ask your IT person to run the setup below — or have our team deploy it for you (oktopeak.com/services/legal-ai-integration/).

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Demo

Watch Claude pull live data from Clio in under a minute — matters, contacts, tasks — without copying client information into chat.

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Compliance & Security

This section exists because law firms evaluating AI tools have asked the right questions. Here are direct answers.

ABA Formal Opinion 512 — AI and competence

ABA Opinion 512 (2023) requires attorneys using AI tools to understand how those tools work, supervise their outputs, and maintain confidentiality of client information. This connector is designed with those obligations in mind:

• Audit log. Every tool call — every time Claude queries Clio on your behalf — is appended to a local log file at ~/.clio-mcp/audit.log. Each entry records the timestamp, which tool was invoked, what arguments were passed, whether it succeeded, and the Clio user ID. The log is stored on your machine, not in any cloud service. It is append-only and never purged by the software, so your firm retains a complete record of AI-initiated data access.

• No data retention by the connector. The connector does not store matter data, client names, or any Clio content. It fetches from the API and passes results to Claude. The only thing persisted locally is your authentication token, and that is encrypted (see below).

• Scope limited to tasks and notes. The connector can create tasks and notes on matters. It cannot create, edit, or delete matters, contacts, documents, calendar entries, or billing records. This is a deliberate v1 design choice — write access is limited to the two operations most useful for AI-assisted legal work while minimising liability.

Token security — encryption at rest

Your OAuth credentials are never stored in plain text. After you authenticate, the connector encrypts your access token and refresh token using AES-256-GCM — the same standard used by financial institutions — and writes the ciphertext to ~/.clio-mcp/tokens.enc. The encryption key is a secret you generate yourself (instructions below) and is never transmitted anywhere.

If someone obtained the token file without the key, they would not be able to read it.

OAuth 2.0 — no passwords stored

Authentication uses Clio's standard OAuth 2.0 flow. You log in through your browser on Clio's own login page. The connector never sees or handles your Clio password. CSRF protection is implemented via a cryptographic state parameter on every auth request.

Local-first architecture

The connector runs entirely on your machine. There is no Clio MCP cloud service, no relay server, no third party in the middle. Your Clio API traffic goes directly from your device to Clio's servers.

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Trust Model

Three questions practitioners evaluating an AI tool for sensitive legal work should ask before installing.

Which Claude tier should we use?

The connector secures the transport between Clio and Claude. It does NOT change what Claude itself does with data once data enters a conversation. Claude's data handling depends on the tier you use, not on this connector.

• Claude Enterprise / Team — explicit no-training guarantees, optional zero-data-retention (ZDR). This is the tier we recommend for any work involving privileged client data.
• Claude API with ZDR — for firms with engineering resources who want full control. Same no-training, no-retention guarantees.
• Claude Pro / Max (consumer) — Anthropic does not train on consumer chat data by default and human review for safety is limited. Acceptable for non-privileged exploration. Not a substitute for an enterprise deployment when handling client matter data.

If you are deploying this connector at a firm, pair it with Claude Enterprise (or API + ZDR). If you are an individual lawyer testing it on personal or non-privileged data, Claude Pro is reasonable for the testing phase but should not become the long-term setup for client work.

Supply-chain trust (npm package)

The connector ships as @oktopeak/clio-mcp on npm. Like every npm package, the published version can be updated at any time by the maintainer. Standard hygiene applies:

• Pin versions in production. Use @oktopeak/clio-mcp@1.0.1 rather than ^1.0.0. Audit before upgrading.
• Review the diff. Every release is a tagged commit on GitHub. Verify changes before pulling a new version into a firm-wide deployment.
• Build from source. If your firm requires it, clone the repo, audit the code, run from your own build artifact. We do not gate any feature behind the npm distribution.
• Maintainers. Published by Oktopeak — a public team with public commits and a public npm publisher account. Not anonymous. We respond to security reports at office@oktopeak.com.

What is encrypted, what is not

To pre-empt a common misread:

• OAuth tokens (your Clio access + refresh token) are encrypted with AES-256-GCM at rest in ~/.clio-mcp/tokens.enc. They cannot be read without the encryption key.
• The encryption key itself is a 64-character hex string you generate and place in your environment (.env file or shell config). It lives on the filesystem in plaintext, protected by OS file permissions. This is standard for developer-machine secrets but is not the strongest possible posture for firm-wide deployment.
• Audit log entries at ~/.clio-mcp/audit.log are not encrypted. They contain metadata (timestamps, tool names, parameters with secrets redacted) — not Clio content.

For higher-rigor deployments, we are tracking OS-keychain integration as v0.2: the encryption key would move into macOS Keychain, Linux secret-service, or Windows Credential Manager instead of the filesystem. Track issue #1 on the repo for progress.

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Running with a local model (no third-party processor)

After the SDNY ruling in United States v. Heppner (Feb 2026) that consumer Claude is not protected by attorney-client privilege, some firms want a deployment with no third-party AI processor at all — model inference running entirely on the firm's own hardware.

This connector supports that out of the box. MCP is a protocol, not a Claude-specific feature. The same connector that talks to Claude Desktop also talks to:

• LM Studio running Llama 4 70B / DeepSeek V4 / Mistral Large locally — recommended primary path
• Continue.dev + Ollama + a bridge (mcphost or ollama-mcp-bridge)
• Any other MCP-compatible client

Full deployment guide and example configs in docs/privilege-stack/. Strategic context (when this beats Claude Enterprise, hardware spec, validation steps) in our Privilege Stack blog post.

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What you can do

Once connected, you can ask Claude things like:

Matters

• "Show me all open matters for Acme Corp"
• "What's the status of matter 2024-0042?"
• "List my pending matters from the last quarter"

Contacts

• "Find the contact details for Jane Smith"
• "What's the email address and phone number for client ID 8821?"

Documents

• "List all documents on matter 4821"
• "Get the download link for document 9934"

Tasks

• "What tasks are due this week on matter 4821?"
• "Show me all high-priority incomplete tasks"
• "Create a task on matter 4821 to file the motion by Friday, high priority"

Notes

• "Add a note to matter 4821: initial consultation completed, client confirmed retainer"
• "Create a note on this matter summarising today's call with the client"

Calendar

• "What do I have scheduled between April 28 and May 2?"
• "List all calendar entries for next week"

Time entries

• "How many hours have been logged on matter 4821 this month?"
• "Show me all time entries between April 1 and April 30"

Billing

• "What's the outstanding balance on matter 4821?"
• "When was the last invoice issued for this matter?"

The connector retrieves live data from Clio on every request. Nothing is cached or stored by the AI.

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Requirements

Before you begin, make sure you have:

• Node.js 18 or later — nodejs.org/en/download
• Claude Desktop — claude.ai/download
• A Clio account with permission to create developer applications (ask your Clio administrator if you are unsure)

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Setup

Setup is a one-time configuration. You will register a Clio Developer App, generate a 64-character encryption key, and add a JSON block to your Claude Desktop config. Plan 10-15 minutes the first time. Subsequent reinstalls take a few minutes.

Before you run any of this in production, read the Compliance & Security and Trust Model sections above. If you are deploying for a firm, pair the connector with Claude Enterprise or the Claude API with ZDR — see "Which Claude tier should we use?" above.

Step 1 — Clone and build

Open a terminal and run:

git clone https://github.com/oktopeak/clio-mcp.git
cd clio-mcp
npm install
npm run build

Note the full path to the folder you just cloned — you will need it in Step 4.

# On Mac/Linux, print the full path:
pwd

# Example output: /Users/yourname/clio-mcp

Step 2 — Create a Clio API application

1. Log in to Clio and go to Settings → Developer Applications
2. Click Add Application
3. Give it a name (e.g., Claude Connector)
4. Set the redirect URI to exactly: http://127.0.0.1:5678/callback
5. Save the application
6. Copy the Client ID and Client Secret — you will need them in the next step

Step 3 — Generate your encryption key

This is a one-time password the connector uses to encrypt your Clio tokens on disk. You generate it on your own machine. It never leaves your laptop, and no one else ever sees it. If you lose it, you re-authenticate — nothing dangerous happens.

In your terminal, run:

node -e "console.log(require('crypto').randomBytes(32).toString('hex'))"

Copy the output. It will be a 64-character string of random letters and numbers. Paste it into a password manager or a safe note — you will use it in Step 4 and you will need it if you ever reconfigure the connector.

Step 4 — Configure Claude Desktop

Open your Claude Desktop configuration file:

• Mac: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

Add the following block inside the "mcpServers" section, replacing the placeholder values with your own:

{
  "mcpServers": {
    "clio": {
      "command": "node",
      "args": ["/FULL/PATH/TO/clio-mcp/build/index.js"]
    }
  }
}

Replace /FULL/PATH/TO/clio-mcp with the path you noted in Step 1 (e.g., /Users/yourname/clio-mcp).

If the file already has other MCP servers configured, add a comma after the last entry and then add the "clio" block.

Using Clio EU, Canada, or Australia? Change CLIO_API_BASE, CLIO_AUTH_URL, and CLIO_TOKEN_URL to your regional Clio endpoints (for example, https://eu.app.clio.com/...). Contact Clio support if you are unsure which region your firm is on.

Step 5 — Restart Claude Desktop

Quit Claude Desktop completely and reopen it.

Step 6 — Authenticate with Clio

In a new Claude conversation, type:

authenticate with Clio

Claude will open your browser to Clio's login page. Log in normally. When you see "Authentication successful", return to Claude. You are connected.

To confirm everything is working, type:

check my Clio auth status

You should see your Clio user ID and token expiry time.

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Available tools

Claude selects and calls these tools automatically based on your questions. You do not need to invoke them by name.

Auth (3 tools)

Tool	What it does
authenticate	Opens your browser to Clio's login page and stores your credentials securely
auth_status	Shows whether you are currently authenticated and when your session expires
logout	Clears your stored credentials from this machine

Matters (2 tools)

Tool	Inputs	What it does
list_matters	status (Open/Pending/Closed), limit	Lists matters with optional status filter
get_matter	matter_id	Returns full detail for a specific matter

Contacts (2 tools)

Tool	Inputs	What it does
search_contacts	query, limit	Searches contacts by name, email, or company
get_contact	contact_id	Returns full detail for a specific contact including all emails, phone numbers, and addresses

Documents (2 tools)

Tool	Inputs	What it does
list_documents	matter_id or parent_id, limit	Lists documents in a matter or folder
get_document	document_id	Returns document metadata and a direct download URL

Tasks (2 tools)

Tool	Inputs	What it does
list_tasks	matter_id, status (Pending/Complete), due_date_start, due_date_end, limit	Lists tasks with optional filters
create_task	matter_id, name, priority (High/Normal/Low), due_date, assignee_id	Creates a task on a matter; priority defaults to Normal

Calendar (1 tool)

Tool	Inputs	What it does
list_calendar_entries	from, to	Lists calendar entries within a date range (YYYY-MM-DD)

Time entries (1 tool)

Tool	Inputs	What it does
list_time_entries	matter_id, start_date, end_date, limit	Lists billable time entries with optional filters

Billing (1 tool)

Tool	Inputs	What it does
get_billing_summary	matter_id	Returns total billed, outstanding balance, and last invoice date for a matter

Notes (1 tool)

Tool	Inputs	What it does
create_note	matter_id, subject, body	Creates a note on a matter; appears in Clio's matter timeline

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Resources

The connector also exposes two MCP resources — read-only content that compatible clients (including Claude Desktop) can surface automatically at the start of a session.

Resource URI	What it contains
clio://compliance/notice	One-paragraph compliance reminder covering ABA Opinion 512, audit logging, and the attorney-review requirement for AI-generated content
clio://auth/status	Live authentication state — whether you are connected, your Clio user ID, and minutes until token expiry

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Configuration reference

All settings are passed as environment variables in your Claude Desktop config (see Step 4). Only the first three are required.

Variable	Required	Default	Description
CLIO_CLIENT_ID	Yes	—	Client ID from your Clio developer application
CLIO_CLIENT_SECRET	Yes	—	Client Secret from your Clio developer application
ENCRYPTION_KEY	Yes	—	64-character hex key for encrypting stored tokens
CLIO_REDIRECT_PORT	No	5678	Local port for the OAuth callback. Change if 5678 is in use on your machine
CLIO_API_BASE	No	https://app.clio.com/api/v4	Override for Clio EU, Canada, or Australia (e.g., https://eu.app.clio.com/api/v4)
CLIO_AUTH_URL	No	https://app.clio.com/oauth/authorize	OAuth authorization endpoint
CLIO_TOKEN_URL	No	https://app.clio.com/oauth/token	OAuth token endpoint

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Audit log reference

Every tool call is recorded at ~/.clio-mcp/audit.log in JSONL format (one JSON object per line). Example entry:

{"timestamp":"2026-04-23T14:05:00.123Z","tool":"get_matter","args":{"matter_id":4821},"outcome":"success","clio_user_id":"10023","matter_id":4821}

Each entry contains:

Field	Description
timestamp	ISO 8601 date and time of the call
tool	Which tool Claude invoked
args	Arguments passed to the tool (secrets are automatically redacted)
outcome	success or error
error_message	Present only when outcome is error
clio_user_id	The Clio user whose credentials were active
matter_id	Present for matter-specific queries
result_count	Present for list tools — number of records returned

The log file is append-only and never rotated or truncated by this software. To archive old entries, use your operating system's log rotation tools (logrotate on Linux/Mac).

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Troubleshooting

Claude says the Clio tool is not available Restart Claude Desktop fully (quit, do not just close the window). If the problem persists, check that the path in your config file is correct and that build/index.js exists in that folder.

Authentication opens a browser but then nothing happens Make sure the redirect URI in your Clio developer application is set to exactly http://127.0.0.1:5678/callback. No trailing slash, no localhost — it must be 127.0.0.1.

"ENCRYPTION_KEY must be 64 hex chars" error Regenerate the key using the command in Step 3. Paste the full output — it should be exactly 64 characters.

"Token file exists but decryption failed" warning This appears if the encryption key in your config no longer matches the key that was used to encrypt the token file. Run the logout tool in Claude and then authenticate again. If you changed your ENCRYPTION_KEY, update it back to the original value, or log out first before changing it.

Port 5678 is already in use Add "CLIO_REDIRECT_PORT": "5679" to the env block in your Claude Desktop config, and update your Clio application's redirect URI to http://127.0.0.1:5679/callback.

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Need more than the connector?

The open-source connector handles about 20% of what most firms eventually want from Claude + Clio. It reads your data. It does not build workflows around that data.

Our Legal AI Integration service picks up where the connector stops:

• Document automation templates — retainer agreements, pleadings, engagement letters, clause libraries drafted by Claude from live matter context, reviewed by an attorney before anything goes out
• Intake workflows — new leads routed into qualified matters, pre-populated with client data, flagged by practice area
• Custom AI agents — deadline reminders, billing review, matter summaries, contract negotiation assistants scoped to your firm's way of working
• Full compliance architecture — audit logging that spans your DMS, e-signature tool, calendar, and billing system, not just Clio

Fixed price, four to six weeks, ABA Opinion 512 compliant from day one.

→ oktopeak.com/services/legal-ai-integration/

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Related projects

If your firm uses Filevine instead of (or alongside) Clio, we ship the same kind of connector for it:

• Filevine MCP — open-source MCP connector for Filevine practice management. 15 tools across cases, contacts, notes, documents, tasks, and Collection sections. Same architecture, same audit logging, same encryption at rest. MIT licensed.
• npm: @oktopeak/filevine-mcp
• MCP Registry: io.github.oktopeak/filevine-mcp

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Contributing

Issues and pull requests welcome. If you run into a Clio API edge case this connector does not handle cleanly, open an issue with the scenario and an example request. If you want to add a tool that falls within the "read-only" v1 scope, send a PR.

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License

MIT © Oktopeak

See LICENSE for the full text.