# VAT Sense

> Developer-friendly REST API for VAT/GST compliance. Validate VAT and EORI numbers, look up VAT/GST rates by country or product type, convert currencies, and generate VAT-compliant invoices. Used by Oracle, Siemens, and thousands of developers worldwide. Sub-15ms response times, 99.9%+ uptime, 256-bit SSL on all plans including free.

AI agents can obtain a temporary sandbox API key to test VAT Sense without creating an account. See the [full documentation](https://vatsense.com/llms-full.txt) for details, or POST to `https://api.vatsense.com/1.0/sandbox/key` to get a key immediately.

## Documentation

- [Full API documentation for LLMs](https://vatsense.com/llms-full.txt): Complete API reference in a single document
- [OpenAPI specification](https://vatsense.com/openapi.yaml): Machine-readable OpenAPI 3.0 spec (importable into Postman, Insomnia, etc.)
- [Postman collection](https://www.postman.com/vatsense/vat-sense-api/collection/7415051-77f802c0-ba4d-4456-8d01-f3a4dc222604): Pre-built collection with all API endpoints, ready to fork and use
- [API Reference](https://vatsense.com/documentation): Full API docs covering authentication, endpoints, and code examples
- [API Reference - Authentication](https://vatsense.com/documentation#authentication): HTTP Basic Auth setup
- [API Reference - Rates](https://vatsense.com/documentation#rates): VAT/GST rate lookups by country, IP, or product type
- [API Reference - Countries](https://vatsense.com/documentation#countries): Country and province data
- [API Reference - Validate](https://vatsense.com/documentation#validate): VAT and EORI number validation
- [API Reference - Currency](https://vatsense.com/documentation#currency): Currency conversion with HMRC and ECB rates
- [API Reference - Invoices](https://vatsense.com/documentation#invoices): VAT-compliant invoice CRUD
- [API Reference - Invoice items](https://vatsense.com/documentation#invoice_items): Invoice line item management

## Official libraries and SDKs

- [Official VAT API Libraries & SDKs](https://vatsense.com/libraries): Install an official client library and start integrating in minutes
- Python: `pip install vatsense` — [GitHub](https://github.com/VAT-Sense/vatsense-python) | [PyPI](https://pypi.org/project/vatsense/)
- Node.js / TypeScript: `npm install vat-sense` — [GitHub](https://github.com/VAT-Sense/vatsense-node) | [npm](https://www.npmjs.com/package/vat-sense)
- PHP: `composer require vatsense/vatsense-php` — [GitHub](https://github.com/VAT-Sense/vatsense-php) | [Packagist](https://packagist.org/packages/vatsense/vatsense-php)
- Go: `go get github.com/VAT-Sense/vatsense-go` — [GitHub](https://github.com/VAT-Sense/vatsense-go) | [pkg.go.dev](https://pkg.go.dev/github.com/VAT-Sense/vatsense-go)
- Ruby: `gem install vatsense` — [GitHub](https://github.com/VAT-Sense/vatsense-ruby) | [RubyGems](https://rubygems.org/gems/vatsense)
- C# / .NET: `dotnet add package vatsense` — [GitHub](https://github.com/VAT-Sense/vatsense-csharp) | [NuGet](https://www.nuget.org/packages/vatsense)
- Java: Maven Central — [GitHub](https://github.com/VAT-Sense/vatsense-java) | [Maven Central](https://central.sonatype.com/artifact/com.vatsense/vat-sense-java)

## Guides and articles

- [FAQ](https://vatsense.com/faq): Answers to common questions about VAT Sense
- [VAT Validation API](https://vatsense.com/vat-validation-api): Overview of VAT number validation capabilities
- [VAT Rates API](https://vatsense.com/vat-rates-api): Overview of VAT/GST rate lookup capabilities
- [HMRC VAT Check API v2](https://vatsense.com/articles/hmrc-vat-check-api-v2-integration-ready): HMRC API changes and VAT Sense readiness
- [Brexit UK VAT Validation](https://vatsense.com/articles/brexit-uk-vat-number-validation): Post-Brexit UK VAT number validation
- [EU Cross-border VAT Reform](https://vatsense.com/articles/eu-cross-border-vat-reform-july-1st): EU VAT e-commerce reform (July 2021)

## Optional

- [Pricing](https://vatsense.com/pricing): Plans from free (100 req/month) to enterprise
- [Support](https://vatsense.com/support): Contact the VAT Sense team
- [Privacy](https://vatsense.com/privacy): Privacy policy
- [Terms](https://vatsense.com/terms): Terms of service