Ask OpenAI Codex CLI about your spending, accounts, and subscriptions. Get real answers from your actual financial data via MCP.
Read-only access · Revoke anytime · Works with Claude Code, Cursor & more
Setup in seconds.
Add this to your Codex CLI configuration file.
{
"mcpServers": {
"warm": {
"command": "npx",
"args": ["-y", "@warmio/mcp", "--server"],
"env": {
"WARM_API_KEY": "your-api-key"
}
}
}
}
Get your API key from Settings → API Keys
MCP Tools available.
Codex CLI automatically discovers and uses these tools.
get_accounts List all connected financial accounts with balances, types, and institutions
"Show me all my accounts"
get_transactions Read transaction history with strict cursor pagination
"What did I spend on food last month?"
get_financial_state Read snapshots, recurring payments, budgets, goals, health, liabilities, holdings, and category spending in one call
"Show my net worth, recurring charges, budgets, and goals"
verify_key Check if your Warm API key is valid and working
"Is my Warm connection working?"
Ask Codex anything.
Real examples of what you can do with your financial data.
Account Overview
"Show me all my bank accounts and their balances"
Codex fetches your accounts via get_accounts, displaying names, types, institutions, and current balances.
Spending Analysis
"How much did I spend on restaurants last month?"
Codex uses get_transactions to page through transaction history, categorize spending, and give you totals with merchant breakdowns.
Subscription Audit
"What recurring charges am I paying?"
Codex uses get_financial_state to review your recurring charges and subscription totals alongside the rest of your current financial state.
Net Worth Tracking
"What's my net worth trend over the past 6 months?"
Codex uses get_financial_state to review your snapshots and net worth trend alongside the rest of your current financial state.
What Codex can see.
Available via MCP
- Accounts (names, types, balances, institutions)
- Transactions (amounts, merchants, categories, dates)
- Recurring payments and subscriptions
- Net worth snapshots over time
Not Exposed (App Only)
- — Budgets and budget progress
- — Savings goals
- — AI chat history
- — Any write operations
Safe and secure.
Your financial data stays protected.
Read-Only Access
The MCP server can only query data—never modify, delete, or transfer.
Scoped API Keys
Your key only accesses your accounts. Nothing else.
Instant Revocation
Delete your API key in Settings and access stops immediately.
Common questions
Everything you need to know about Codex CLI and Warm.
How do I add Warm to Codex CLI?
Create a .codex/config.json file in your project or home directory with the MCP server config. Set the command to "npx", args to ["-y", "@warmio/mcp", "--server"], and add your WARM_API_KEY from Settings → API Keys. Codex will automatically discover the tools.
What financial data can Codex access?
Codex can access your accounts (balances, types, institutions), transactions (amounts, merchants, categories, dates), and financial state: snapshots, recurring payments, budgets, goals, financial health, liabilities, investment holdings, and category spending. AI chat history and household/sharing settings remain app-only.
Is this safe? Can Codex modify my data?
The MCP server is strictly read-only. Codex cannot modify, delete, or transfer any data. Your API key is scoped to only your accounts, and you can revoke it instantly from Settings if needed.
Does Codex CLI support MCP?
Yes. OpenAI Codex CLI supports MCP servers through its config file. The Warm MCP server works just like any other MCP integration—Codex auto-discovers and uses the available tools.
Do I need to install anything?
You need Node.js 18+ installed. The MCP server runs via npx @warmio/mcp, so there's no global installation required. Just add the config and your API key.
Is this feature free?
No, the MCP server and API access are exclusive to Warm Pro ($24.99/mo). Free and Plus tiers do not include API access.
More Ways to Connect
Ready to ask Codex CLI
about your money?
Your financial data, accessible in your AI terminal workflow.
MCP access is exclusive to Pro. It is not included with Plus.