Features
MCP
Nethaven exposes a secure MCP endpoint so you can ask Claude, ChatGPT, or Cursor questions like "What's my net worth?" or "How much did I spend on dining this month?" Your assistant signs in with your Nethaven account via OAuth, no API keys to copy, no data exported to a third party.
What you get
- Read net worth, accounts, transactions, spending, and budgets by chat
- Write actions: add a transaction, categorize, set a budget amount, create a budget
- OAuth login, your assistant connects as you, no credentials shared
- Every write asks for your approval before it runs
- Revoke access any time from Settings
- Works with Claude, ChatGPT, Cursor, and any client that supports remote MCP
Nethaven is a personal finance app for iOS and Android that connects banks securely, brokerages through SnapTrade, and manual assets into one dashboard. MCP is part of that unified view, so you are not exporting CSVs or reconciling separate tools every month.
Use categories and limits to stay on plan, then zoom out to net worth, debt payoff, savings goals, and subscriptions without losing context. Household invites let partners share an organization budget while each person keeps their own login.
Not investment advice. Data sync depends on institution availability; see in-app connection flows for banks and brokerages supported in your region.
How the connection works
Nethaven publishes a remote MCP endpoint at https://api.nethaven.app/mcp. When you add it to a supported assistant, the assistant opens a standard OAuth login so you can sign in to Nethaven. No API key is created, your assistant receives a short-lived token that only lets it call approved Nethaven tools. The same revoke button you use for connected apps ends the access immediately.
The assistant only sees data that a tool explicitly returns. It cannot browse your account freely, read raw transaction exports, or access features outside the approved tool list. Each tool is scoped: net worth returns one number, spending summary returns aggregates by category, list transactions returns a page of recent activity. The assistant does not receive a data dump.
What the assistant can read
Read tools cover the data most useful for quick financial questions: your current net worth, account balances, recent transactions, monthly spending by category, and budget amounts. These are the same numbers visible in the Nethaven dashboard, the assistant is reading your live data, not a cached snapshot.
Because the connection is live, the assistant can answer questions like "Did my grocery spending go up this month compared to last?" or "Which accounts are pulling my net worth down?" without you exporting anything. The data stays in Nethaven; only the answer travels to your chat.
What the assistant can change, and what it cannot
Write tools are intentionally narrow. The assistant can add a single transaction, change the category of a transaction, update a budget category amount, or create a new budget. Every write shows a confirmation step in the assistant before Nethaven runs it, you approve each action individually.
The assistant cannot delete data, link bank accounts, move money, access admin settings, or make bulk edits. These limits are enforced at the API level, not just by the assistant's instructions, so they hold regardless of how a prompt is worded.
Supported clients
Any MCP client that supports remote Streamable HTTP with OAuth can connect. The setup is the same for all of them: open the client's MCP or connectors settings, add a remote server, paste https://api.nethaven.app/mcp, and sign in when prompted. Claude (desktop and web), ChatGPT, and Cursor all support this flow. Clients that only support local stdio servers can use mcp-remote as a bridge, a one-line config shown in Settings.
Requires an active Nethaven Pro subscription.
Prompts you can try
Once the connection is live, these are the kinds of questions the assistant can answer using Nethaven's approved tools. Reads run without extra prompts; writes ask you to approve each action in the chat before anything is applied.
Net worth & accounts, "What's my net worth?", "List my accounts and their balances.", "Which accounts are pulling my net worth down?", "How much do I have across all my accounts in total?"
Transactions & spending, "Show my most recent transactions.", "How much did I spend on dining this month?", "Did my grocery spending go up this month compared to last?", "What did I earn vs. spend in July?", "Find the transaction from Spotify last week." (then "Categorize that one as Subscriptions.")
Budgets, "How is my budget looking this month?", "How much is left for groceries?", "What are my budget categories and their limits?", "Set my dining-out budget to $300." (write, requires approval), "Create a new budget called Travel." (write, requires approval)
Portfolio, "Show my portfolio holdings.", "How are my crypto and stocks doing?", "What's my total investment value?", "How has my portfolio performed over the past year?", "What were my best and worst performers?", "Give me the details on my Bitcoin holding, including transactions."
Subscriptions, "What subscriptions do I have?", "What's due soon?", "How much do I spend on subscriptions per year?", "Show the transaction history for my Netflix subscription."
The assistant only sees data that a tool explicitly returns, so it cannot free-form browse your account or read raw exports. Each question maps to one approved tool with a scoped response, net worth returns one number, spending summary returns aggregates, list transactions returns a page of recent activity.