For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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GuidesAPI Reference
GuidesAPI Reference
    • Welcome to Ziptax
      • Quickstart
      • How to create an API key
      • How to find a TIC
      • Overview
      • Claude Skill
      • MCP Server
      • OpenAPI Spec
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  • Available resources
  • LLM reference file
Agents & LLMs

Agents & LLMs

Integrate Ziptax into your AI agent, copilot, or LLM workflow
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Claude Skill

Add Ziptax as a Skill inside Claude Desktop
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Built with

Modern AI agents, developer copilots, and large language models increasingly rely on machine-readable documentation to understand how to interact with APIs. Ziptax publishes first-class resources designed for this workflow, from a hosted MCP server to a drop-in Claude Skill to a machine-readable OpenAPI specification, so your agent can look up door-level U.S. and Canadian sales tax rates with minimal setup.

Available resources

Claude Skill

Drop-in Skill for Claude Desktop that teaches Claude how to call the Ziptax API and reason about sales tax data.

MCP Server

Hosted Model Context Protocol server exposing lookup_tax_rate and get_account_metrics tools over Streamable HTTP.

Machine-Readable OpenAPI Spec

Canonical OpenAPI v3 JSON document describing every endpoint, parameter, and response schema.

LLM reference file

Ziptax publishes an llms.txt index at developers.zip.tax/llms.txt that acts as a machine-readable map of the developer documentation. Pointing an agent at this file improves accuracy when generating code, answering developer questions, or orchestrating tax calculations inside automated workflows.

Need an API key? Create a free account at platform.zip.tax.