DayZero API Documentation

Everything you need to integrate with DayZero's accounting platform. Manage transactions, invoices, journal entries, reconciliations, and financial reports through a modern REST API.

Authentication

Set up Bearer tokens and learn about the business context header.

First Request

Make your first API call in under 5 minutes.

API Reference

Full interactive reference for every endpoint, schema, and parameter.

Guides

Step-by-step walkthroughs for transactions, invoices, reconciliation, and more.

Error Handling

Understand status codes and error response formats.

Pagination

Navigate large result sets with cursor-based pagination.

DayZero — AI Accounting Software That Runs Your Back Office

DayZero is AI-native accounting software that automates bookkeeping, bank reconciliation, invoicing, bills, payroll, inventory, expenses, and financial reporting — replacing your disconnected tools with one platform so advisory firms and growing businesses can focus on what matters.

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Features

AI-Native General Ledger — Double-entry bookkeeping engine with AI-powered categorization and journal entry drafting.
Bank Reconciliation — Connect your bank via Plaid and let AI match transactions, surface discrepancies, and auto-reconcile.
Invoicing & AR — Create, send, and track invoices. Stripe-powered payments with automatic revenue recognition.
Bills & AP — Scan bills, auto-extract line items, manage approvals, schedule payments, and track vendor balances.
Financial Reporting — Income statement, balance sheet, cash flow, budgets, and custom reports generated on demand.
Inventory & Orders — Track products, manage purchase orders, and sync stock across locations with Shopify and Square.
Payroll & Expenses — Sync payroll from Gusto and corporate card expenses from Ramp — journal entries created automatically.
Fixed Assets & Depreciation — Track capital equipment, calculate depreciation schedules, and post entries automatically.

CFO Advisory

DayZero continuously analyzes your books to surface the metrics, insights, and recommendations that used to require a full-time finance team. Financial scorecards, variance analysis, lending preparation, and cash flow forecasting — generated automatically from your live data.

Integrations

DayZero integrates with Plaid, Stripe, Shopify, Square, Ramp, Gusto, HubSpot, and Slack.

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For Scaling Businesses

Run your entire back office with AI-powered automation — from books to inventory to payroll. Invoicing and payments, inventory and e-commerce, payroll, expenses, banking, and reporting.

For Advisory Firms

Scale your practice across clients with multi-tenant workflows and reporting. Multi-client management, client portal, cross-client reporting, and 200+ reusable workflows.

Pricing

Scaling Business — Self-Directed: Free for 1 month, then $100/mo. Full AI agent access, unlimited transactions, all integrations.
Scaling Business — Fully Managed: $300/mo. DayZero's accounting team handles your books end-to-end.
Advisory Firm: $100/client/mo. First month free. Platform fee waived for first 10 clients.

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Frequently Asked Questions

What is DayZero?: DayZero is an AI-native accounting platform for advisory firms and scaling businesses. It handles bookkeeping, bank reconciliation, invoicing, AP/AR, reporting, and more — powered by specialized AI agents.
How does the AI work? Is it accurate?: DayZero uses purpose-built AI agents trained specifically for accounting tasks. Every action is logged and reviewable with full source attribution.
Can I migrate from QuickBooks or Xero?: Yes. DayZero supports migration from QuickBooks Online, Xero, and other platforms. We import your chart of accounts, historical transactions, and open balances.
Is my data secure?: DayZero uses AES-256 encryption at rest and TLS 1.3 in transit. SOC 2 Type II certification in progress. Full audit trails for all AI actions.
How does pricing work?: For scaling businesses, $100/month with your first month free. For advisory firms, $100/client/month with platform fee waived for first 10 clients.
Do I need an accountant to use DayZero?: No. DayZero is designed so business owners can manage their own books with AI assistance. A fully-managed plan is also available.
What integrations are supported?: Plaid (banking), Stripe (payments), Shopify (e-commerce), Square (POS), Ramp (corporate cards), Gusto (payroll), HubSpot (CRM), and Slack (notifications).
How is DayZero different from QuickBooks, Xero, or Bench?: DayZero is AI-native from the ground up — not AI bolted on after the fact. It gives you real-time access and full control with 200+ specialized AI tools.

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