For Developers
Build on top of DoubleM financial data.
Use the REST API for structured application integrations, or connect the MCP server so AI assistants can read reports and perform approved finance actions through tools.
REST API
Integrate expenses, income, accounts, cards, bills, loans, reports, settings, and AI parse flows with authenticated JSON and multipart requests.
Read API docsMCP Integration
Give Codex, Claude Code, or another MCP-capable assistant a safe tool layer for finance queries and explicit record-keeping actions.
Read MCP guideAuthentication first
External integrations should use a DoubleM API key token in the Authorization header. First-party clients may use a Supabase JWT.
Owner-scoped data
Every route and tool operates on the authenticated user account. Integrations should never submit user_id manually.
Predictable envelopes
Responses use consistent success and error shapes so client apps can build one shared handler.
Review side effects
Account debits, card transactions, bill payments, loan payments, and MCP tool writes should be user-approved in your UI.