> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.zip.tax/v-5-0/guides/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.zip.tax/_mcp/server.

# Guides

## Docs

- [Welcome to Ziptax](https://docs.zip.tax/v-5-0/guides/welcome-to-ziptax.md): Ziptax provides a developer-friendly API and an online lookup tool for precise sales tax data. By using geographic inputs such as a full street address, you can instantly determine the correct sales tax rates for any place in the United States and Canada.
- [Quickstart](https://docs.zip.tax/v-5-0/guides/tutorials/quickstart.md): Get your first sales tax rate back from Ziptax in under five minutes
- [How to create an API key](https://docs.zip.tax/v-5-0/guides/tutorials/how-to-create-an-api-key.md): Generate a new Ziptax API key from your account dashboard
- [How to find a TIC](https://docs.zip.tax/v-5-0/guides/tutorials/how-to-find-a-tic.md): Look up the right Taxability Information Code for a product or service
- [Language SDKs](https://docs.zip.tax/v-5-0/guides/sdks/overview.md): Idiomatic client libraries for the Ziptax API
- [Go SDK](https://docs.zip.tax/v-5-0/guides/sdks/go-sdk.md): Official Go SDK for the Ziptax API
- [Python SDK](https://docs.zip.tax/v-5-0/guides/sdks/python-sdk.md): Official Python SDK for the Ziptax API
- [Node SDK](https://docs.zip.tax/v-5-0/guides/sdks/node-sdk.md): Official Node.js SDK for the Ziptax API
- [REST API Overview](https://docs.zip.tax/v-5-0/guides/rest-api/overview.md): Pick the right lookup method for your use case
- [By Address](https://docs.zip.tax/v-5-0/guides/rest-api/by-address.md): Door-level sales tax rate for a street address
- [By Lat / Lng](https://docs.zip.tax/v-5-0/guides/rest-api/by-lat-lng.md): Door-level sales tax rate for a geographic coordinate
- [By Postal Code](https://docs.zip.tax/v-5-0/guides/rest-api/by-postal-code.md): All tax rates that overlap a U.S. ZIP code
- [Agents & LLMs](https://docs.zip.tax/v-5-0/guides/agents-and-llms/overview.md): Integrate Ziptax into your AI agent, copilot, or LLM workflow
- [Claude Skill](https://docs.zip.tax/v-5-0/guides/agents-and-llms/claude-skill.md): Add Ziptax as a Skill inside Claude Desktop
- [MCP Server](https://docs.zip.tax/v-5-0/guides/agents-and-llms/mcp-server.md): Real-time sales tax tools for AI agents via Model Context Protocol
- [Machine-Readable OpenAPI Spec](https://docs.zip.tax/v-5-0/guides/agents-and-llms/openapi-spec.md): The canonical OpenAPI v3 document for the Ziptax API
- [Event Webhooks Overview](https://docs.zip.tax/v-5-0/guides/webhooks/overview.md): Get real-time HTTP notifications when data changes in Ziptax, instead of polling
- [Prerequisites & access](https://docs.zip.tax/v-5-0/guides/webhooks/prerequisites.md): What you need before you can configure Event Webhooks
- [Configure an endpoint](https://docs.zip.tax/v-5-0/guides/webhooks/configure.md): Add endpoint URLs and choose which events they receive
- [Events reference](https://docs.zip.tax/v-5-0/guides/webhooks/events.md): The event catalog, payload schema, and delivery mechanics
- [Verify & secure deliveries](https://docs.zip.tax/v-5-0/guides/webhooks/verify.md): Use your signing secret to confirm requests come from Ziptax
- [Test & monitor](https://docs.zip.tax/v-5-0/guides/webhooks/testing.md): Send test events and check the status of your deliveries
- [Best practices](https://docs.zip.tax/v-5-0/guides/webhooks/best-practices.md): Patterns for reliable, secure webhook handling
- [Taxability Information Codes (TICs)](https://docs.zip.tax/v-5-0/guides/product-rules/taxability-information-codes.md): Product-specific tax rules for clothing, food, software, and more
- [Product Codes](https://docs.zip.tax/v-5-0/guides/product-rules/product-code-search.md): Map natural language product descriptions to Taxability Information Codes (TICs).
- [Authentication](https://docs.zip.tax/v-5-0/guides/reference/authentication.md): How to authenticate Ziptax API requests using an API key, including where to send the key and which entitlements gate specific features.
- [Collection Requirements and Nexus](https://docs.zip.tax/v-5-0/guides/reference/collection-requirements-and-nexus.md): Understanding when a business is required to collect sales tax based on Nexus
- [Response Codes](https://docs.zip.tax/v-5-0/guides/reference/response-codes.md): Every application-level code Ziptax can return, what it means, and how to handle it
- [Rate Limiting & Errors](https://docs.zip.tax/v-5-0/guides/reference/rate-limiting-errors.md): How Ziptax throttles traffic, what headers to read, and how to back off cleanly
- [Account Metrics & Usage](https://docs.zip.tax/v-5-0/guides/reference/account-metrics.md): Check your plan quota, usage, and account status with `/account/v{N}/metrics`