Build on Guliel.

Developer reference for the REST API, the MCP server, webhooks, and the official client libraries. Every endpoint, every webhook event, every MCP tool — documented with an example.

• REST API: invoices, expenses, customers, suppliers, payments, reports.
• MCP server: tools, resources, prompts. OAuth- and PAT-authenticated.
• Webhooks: invoice.paid, expense.captured, supplier.order_received, more.
• Detailed per-method documentation is rolling out — start with the overview.