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Sync2Books is two separate products: an Accounting API that syncs financial data to accounting systems (QuickBooks Online, Xero, Sage, Dynamics 365 Business Central, Odoo), and a Compliance API (eTIMS) that keeps your Kenyan customers tax-compliant with KRA — without building against each system yourself. Each has its own API keys and its own docs.

New here? Start with: which API do I need?

A two-minute read that separates the two products so the rest of these docs make sense. Read this first.

Accounting API quickstart

Get an API key, connect a system, and make your first call in five minutes.

eTIMS quickstart

From a test key to your first KRA-signed receipt and credit note.

Accounting API authentication

The API key, the optional request signature, and your client secret.

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Start with the core concepts

These concepts apply to the Accounting API. The eTIMS API has its own authentication and conventions: see Authentication & API keys and Core concepts.

Companies & connections

The shared object model: organizations, applications, companies, connections.

The sync model

Submit, push, confirm — how asynchronous syncs and batches work.

Environments & base URLs

Development vs production, and the correct base URL.

Errors & rate limits

The consistent error shape and throttling headers.

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The two products

Accounting API

Write categorized expenses, bills, invoices, and payments to your customers’ accounting software.Reference: interactive Accounting API docs

Compliance API — eTIMS (Kenya)

Register items, manage stock, and issue KRA-signed sales and credit notes.Reference: eTIMS API docs
Not sure which one applies to you? See Which API do I need?

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Build the connection UI

Link component

Drop-in UI to connect accounting systems — React, Vue, Angular, Svelte.

QuickBooks Online

Setup, FAQs, and reference for the QuickBooks Online integration.

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Support