Api, Developer, Platform, Infrastructure, Cloud Tax Compliance

Faster integration, without the friction

Clear documentation, SDKs, and sample code help teams embed compliance quickly without deep tax expertise.

One API strategy across the compliance life cycle

From real-time tax calculation to returns, exemption documents, tariff code classification, and registrations, Avalara APIs support end-to-end compliance workflows.

Designed for enterprise scale

Avalara processes billions of API calls annually, supporting high-volume transactions across regions and tax regimes.

Security built in

Every API operates within Avalara’s enterprise-grade security framework, with continuous monitoring and dedicated incident response support.

APIs

Avalara APIs support every stage of tax and compliance workflows.

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Tax calculation APIs

Calculate sales and use tax in real time across jurisdictions, products, and transaction types.

Returns APIs

Automate returns preparation, filing, and remittance workflows directly from your systems.

Compliance document and certificate management APIs

Manage exemption certificates, e-invoicing documents, and compliance records programmatically.

Tariff code classification APIs

Assign tariff and classification codes to products for accurate cross-border compliance.

1099 and W-9 APIs

Collect, validate, and manage tax forms with API-based workflows.

Tax registration and business license APIs

Support registrations, licensing, and compliance onboarding through structured API calls.

How it works

Integrate compliance where work happens

Connect

Follow guided integration paths tailored to your use case, whether you’re embedding real-time tax calculation, filings, or registrations.

Build

Accelerate development with SDKs, sample code, and prebuilt libraries designed for common architectures.

Test and certify

Validate your integration in sandbox environments and achieve Avalara certification for production readiness.

Scale

Move to production with enterprise-grade infrastructure built to handle high-volume traffic reliably.

Customers

Powering global commerce platforms and enterprises

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The custom solution we developed with Avalara was an absolute game changer. It allows us to keep inventory on our platform without becoming noncompliant.

Brad Caproni, Director, Global Indirect Tax

Industry: Ecommerce

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The API connection to Avalara makes sure we apply the right tax to each line item based on rates for the applicable jurisdictions.

Hector Camacho, Controller

Retail and Ecommerce

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Integrations

Built to fit your stack

Avalara APIs easily plug into the business applications and platforms you already rely on.

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Enterprise-ready infrastructure

Multicloud availability, SOC 2 compliance, encryption at rest and in transit, and global content coverage built to support complex enterprise environments.

Avalara for enterprise