MCP Server

Give AI agents read-only access to your banking and brokerage data

The Redbark MCP server connects AI assistants like Claude, ChatGPT, and Cursor directly to your bank accounts, balances, transactions, and brokerage data. Instead of syncing to a spreadsheet or app, the AI queries your data on demand.

MCP access requires a Developer or Professional plan. Brokerage data (holdings, trades) requires Professional.

What is MCP?

Model Context Protocol is an open standard that lets AI tools read data from external services. The Redbark MCP server provides read-only access — your AI can view your data but can never modify, delete, or move anything. When connected, your AI assistant can answer questions like:

• “What bank accounts do I have connected?”
• “What’s my current balance across all accounts?”
• “What did I spend on groceries this month?”
• “Show me my brokerage holdings and P&L”

Data is fetched live from your banking provider on each request. Nothing is stored by Redbark or sent to the AI until you ask.

How it’s different from other destinations

	Google Sheets, You Need a Budget, etc.	MCP Server
When data moves	On a schedule (every few hours)	On demand, when you ask
What moves	Transactions are written and stored	Nothing is stored; data is fetched live
Set up in	Redbark dashboard	Your AI tool’s config file
Best for	Record-keeping, budgeting, automation	Asking questions, analysis, ad-hoc lookups

Setup

1. Copy the MCP URL

   Go to Settings > AI Connectors in the Redbark dashboard and copy the MCP URL:

   https://mcp.redbark.co/mcp
   
2. Add the server to your AI tool

   Paste the URL into Claude, ChatGPT, Cursor, or any remote MCP client. Your tool will open a Redbark OAuth consent screen.

3. Start asking questions

   Open a conversation and ask about your accounts, balances, or transactions. The AI will call the MCP server automatically.

Configuration

Claude (claude.ai, Desktop, Cowork, mobile)

Anthropic’s Custom Connectors flow works the same in claude.ai, Claude Desktop, Cowork, and the mobile apps — once added, the connector is available everywhere you use Claude.

Pro / Max (personal):

1. Open Customize > Connectors in Claude.
2. Click + then Add custom connector.
3. Paste the URL:
   https://mcp.redbark.co/mcp
   
4. Click Add, then Connect on the new redbark entry to run through the OAuth consent screen.

Team / Enterprise: an owner adds the connector once at Organization settings > Connectors > Add > Custom > Web, pastes the same URL, and clicks Add. Members then go to Customize > Connectors and click Connect.

Leave OAuth client ID/secret blank — Redbark uses dynamic client registration, so Claude provisions a client automatically. See Anthropic’s custom connectors guide for screenshots.

Claude Code

Use the CLI (recommended):

claude mcp add --transport http redbark https://mcp.redbark.co/mcp

Then run /mcp inside Claude Code to complete the OAuth flow.

Or add the server to .mcp.json in your project root (or ~/.claude.json for user scope):

{
  "mcpServers": {
    "redbark": {
      "type": "http",
      "url": "https://mcp.redbark.co/mcp"
    }
  }
}

"type": "streamable-http" is an accepted alias for "http".

Cursor

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project):

{
  "mcpServers": {
    "redbark": {
      "url": "https://mcp.redbark.co/mcp"
    }
  }
}

Cursor will open the Redbark OAuth consent screen on first connection. See Cursor’s MCP docs.

ChatGPT

Custom MCP connectors require Developer Mode in ChatGPT. Available on Plus, Pro, Business, Enterprise, and Edu plans.

1. Go to Settings > Apps & Connectors > Advanced settings and toggle Developer Mode on.
2. Back in Settings > Connectors, click Create.
3. Fill in:
   • Connector name: Redbark
   • Description: e.g. Live bank and brokerage data from Redbark
   • Connector URL: https://mcp.redbark.co/mcp
   • Authentication: OAuth
   • Tick I trust this application
4. Click Create, then connect the new connector to run the OAuth flow.

See OpenAI’s ChatGPT connector setup guide.

API keys are still supported for direct REST API consumers and advanced local MCP setups, but OAuth is recommended for hosted AI connectors.

What your AI can access

Once connected, these tools are available to your AI assistant:

Tool	What it does	Plan
list_connections	Show all linked bank and brokerage connections	Developer+
list_accounts	List all accounts with names, types, and currencies	Developer+
list_balances	Fetch live balances for specific accounts	Developer+
list_transactions	Get transactions with date range and account filters	Developer+
list_holdings	Show brokerage holdings with prices and P&L	Professional
list_trades	List brokerage trades with date filters	Professional

The AI chooses which tool to call based on your question. You don’t need to know the tool names.

Security

• Read-only access: the MCP server can only read your data. It cannot create, modify, or delete anything in your bank accounts, connections, or syncs.
• Your data stays yours: data is fetched live from your bank and returned to your AI tool. Redbark never stores transaction data.
• OAuth auth: hosted AI tools receive short-lived OAuth access tokens and refresh them without storing your Redbark API keys.
• Plan-gated: only users on Developer or Professional plans can use the MCP server. Brokerage tools are restricted to Professional.
• Revocable: you can revoke a connected app from the dashboard at any time. The MCP server immediately stops accepting its tokens.

Troubleshooting

Problem	Fix
”Missing Authorization header” / “Invalid or expired OAuth access token”	Reconnect the Redbark MCP server from your AI tool so it can complete the OAuth flow again
”MCP server not available” / 405 Method Not Allowed / connection fails silently	In Claude Code’s .mcp.json, make sure "type" is "http" (or "streamable-http"), not "sse". Our server is Streamable HTTP only and will reject SSE-style GET requests
”Add custom connector” button not visible in Claude	You’re on the wrong screen — Custom Connectors live under Customize > Connectors (personal) or Organization settings > Connectors (Team/Enterprise owners), not Settings > Connectors
ChatGPT won’t let you add a custom MCP server	Toggle Developer Mode on first under Settings > Apps & Connectors > Advanced settings
”Invalid or revoked API key”	If you are using legacy API-key auth, create a new key in Settings > API Keys
”API access requires a Developer or Professional plan”	Upgrade your plan
”Brokerage endpoints require a Professional plan”	Holdings and trades need a Professional plan
”This OAuth connection does not include brokerage access”	The AI tool was connected without the brokerage:read scope. Disconnect and reconnect, and grant brokerage access on the consent screen
Server not responding	The server scales from zero; retry after a few seconds
Tools not showing up	Restart your AI tool after editing the config file

For the full technical reference (schemas, error formats, endpoint details), see the API Reference > MCP Server page.