# DayZero API — Guides

> 34 guides. Each link is the markdown version; drop the `.md` for HTML. Endpoint reference: https://www.ondayzero.com/docs/reference/index.md

## Guides

- [Accounting Glossary](https://www.ondayzero.com/docs/guides/accounting-glossary.md) — Accounting terminology used throughout the DayZero API and what each term means.
## Getting Started

- [Authentication](https://www.ondayzero.com/docs/guides/authentication.md) — Set up Bearer token authentication for the DayZero API.
- [First Request](https://www.ondayzero.com/docs/guides/first-request.md) — Make your first API call to DayZero in under 5 minutes.
- [Error Handling](https://www.ondayzero.com/docs/guides/error-handling.md) — Understand DayZero API error responses and status codes.
- [Pagination](https://www.ondayzero.com/docs/guides/pagination.md) — Navigate large result sets with cursor-based pagination.
- [Using DayZero from an AI Agent](https://www.ondayzero.com/docs/guides/ai-agents.md) — How coding agents and LLM tools should discover endpoints, authenticate, read the docs programmatically, and call the REST API safely.
## Integrations

- [MCP Server](https://www.ondayzero.com/docs/guides/mcp.md) — Connect AI assistants like Claude, ChatGPT, Cursor, and Codex to DayZero via the Model Context Protocol — sign in with OAuth 2.1 in your browser.
## Guides

- [Transactions](https://www.ondayzero.com/docs/guides/transactions.md) — Work with bank transactions — syncing, categorization, and reconciliation.
- [Invoices](https://www.ondayzero.com/docs/guides/invoices.md) — Create and manage invoices — accounts receivable workflows.
- [Bills](https://www.ondayzero.com/docs/guides/bills.md) — Create and manage bills — accounts payable workflows.
- [Journal Entries](https://www.ondayzero.com/docs/guides/journal-entries.md) — Double-entry bookkeeping with the journal entries API.
- [Customers](https://www.ondayzero.com/docs/guides/customers.md) — Manage customer records, contacts, and bulk imports.
- [Reconciliation](https://www.ondayzero.com/docs/guides/reconciliation.md) — Bank statement reconciliation with AI-assisted matching.
- [Reports](https://www.ondayzero.com/docs/guides/reports.md) — Generate financial reports as Excel, CSV, PDF or HTML files with download URLs.
- [Vendors](https://www.ondayzero.com/docs/guides/vendors.md) — Manage vendor records, contacts, and duplicate detection.
- [Ledgers](https://www.ondayzero.com/docs/guides/ledgers.md) — Manage the chart of accounts — create, update, merge, and organize ledger accounts.
- [Webhooks](https://www.ondayzero.com/docs/guides/webhooks.md) — Receive real-time notifications from Stripe, Shopify, and Plaid.
- [Credit Memos](https://www.ondayzero.com/docs/guides/credit-memos.md) — Issue and apply credit memos — manage customer credits and refunds.
- [Search](https://www.ondayzero.com/docs/guides/search.md) — Search across all entity types with full-text and natural language queries.
- [Tags](https://www.ondayzero.com/docs/guides/tags.md) — Organize entities with tag groups and tags — departments, projects, locations.
- [Budgets](https://www.ondayzero.com/docs/guides/budgets.md) — Create budgets, track spending against plans, and generate forecasts.
- [Recurring Templates](https://www.ondayzero.com/docs/guides/recurring.md) — Automate recurring invoices and bills with customizable schedules.
## Integrations

- [Stripe Integration](https://www.ondayzero.com/docs/guides/stripe.md) — Payment processing via Stripe Connect with automatic journal entries.
## Guides

- [Exports](https://www.ondayzero.com/docs/guides/exports.md) — Export transactions, customers, and orders as Excel spreadsheets.
## Integrations

- [Plaid Integration](https://www.ondayzero.com/docs/guides/plaid.md) — Connect bank accounts and sync transactions via Plaid.
## Guides

- [Inventory](https://www.ondayzero.com/docs/guides/inventory.md) — Manage products, variants, orders, shipments, locations, and production.
## Integrations

- [Shopify Integration](https://www.ondayzero.com/docs/guides/shopify.md) — E-commerce accounting automation with Shopify.
## Guides

- [Fixed Assets](https://www.ondayzero.com/docs/guides/fixed-assets.md) — Track fixed assets, depreciation schedules, and disposal.
## Integrations

- [Square Integration](https://www.ondayzero.com/docs/guides/square.md) — Point-of-sale accounting automation with Square.
- [Ramp Integration](https://www.ondayzero.com/docs/guides/ramp.md) — Corporate card expense tracking and reimbursement automation with Ramp.
## Guides

- [Tax](https://www.ondayzero.com/docs/guides/tax.md) — Configure tax rates and tax codes for invoices and bills.
- [Payment Terms](https://www.ondayzero.com/docs/guides/payment-terms.md) — Configure payment terms for invoices and bills.
- [File Uploads](https://www.ondayzero.com/docs/guides/uploads.md) — Upload files via presigned URLs or direct upload, and download attachments.
- [Partner Credit Lines](https://www.ondayzero.com/docs/guides/credit.md) — Run a card-backed lending program on DayZero — programs, credit lines, loans, statements, payments, underwriting, cards, and the credit event feed.