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Tandom

The building blocks of global trade.

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Products

  • Tariff Calculator
  • AD/CVD Intelligence
  • HTS Classification
  • Document Intelligence
  • Entry Filing
  • Excel Plugin
  • Email Plugin

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  • AD/CVD Catalog
  • HTS Catalog
  • Pending Investigations Directory
  • Rate Change Feed

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  • API
  • AI Agent Workflows
  • MCP Connector
  • API Reference
  • API Pricing
  • API Changelog

Resources

  • Resource Center
  • Guides
  • Roadmap

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Resources/Guides

Resource Center

Guides

Practical guides to recurring trade-compliance questions. Each guide is broker-grade, primary-source-cited, and walks through a real worked example with deep links into the Tandom calculator and AD/CVD catalog.

Topics
Topics

10 guides

How to show landed cost at checkout for cross-border ecommerce

Implementation playbook for showing landed cost (duty + fees) at checkout after the August 2025 de minimis suspension. Decision matrix by volume, runnable Tandom API code, postal vs courier math, and a contrarian callout for when you should NOT integrate.

16 min read·Updated May 7, 2026

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How to choose a duty calculation API for cross-border ecommerce

Honest provider comparison across Zonos, Shopify Markets DDP, Easyship, Passport, Avalara CrossBorder, and Tandom. Pricing, integration breadth, AD/CVD coverage, DDP guarantee fine print, and decision framework by use case.

13 min read·Updated May 7, 2026

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Real-time alerts when a CSMS message changes a duty rate you depend on

Set up real-time alerts when a CBP CSMS message changes a duty rate on an HTS code you depend on. Built for brokers, forwarders, and importer compliance.

11 min read·Updated May 5, 2026

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How trade compliance APIs fit into broker workflows

Where trade compliance APIs fit in a broker's filing pipeline: HTS classification, duty calculation, AD/CVD scope match, and post-summary corrections.

11 min read·Updated May 5, 2026

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How to wire the Tandom Duty Calculator API into a TMS or broker software

Drop the Tandom Duty Calculator API into a TMS, broker software, or in-house ERP. Code samples, the response shape, and ACE reporting order, in 2026.

11 min read·Updated May 5, 2026

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How to bulk-classify SKU descriptions with the Tandom HTS Classifier API

Run thousands of product descriptions through HTS classification, score the confidence, and triage the borderline rows. For brokers and ecommerce ops.

11 min read·Updated May 5, 2026

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How to validate broker HTS classifications using the Tandom HTS API

Build a second-pass HTS classification audit on a year of broker entries using Tandom's classifier API. Workflow, code, and the obligation behind it.

11 min read·Updated May 5, 2026

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How to extract HTS-eligible fields from commercial invoices

Turn a PDF commercial invoice into ACE-ready entry data: which fields to extract, how to chain extraction into HTS classification and duty calculation.

13 min read·Updated May 5, 2026

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How to expose the Tandom AD/CVD lookup as a Claude MCP tool

Wire the Tandom AD/CVD lookup into Claude as a Model Context Protocol tool. Real JSON-RPC traces, the tool list, and a worked example, in 2026.

12 min read·Updated May 5, 2026

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How to write a Claude or ChatGPT prompt that produces broker-grade HTS classifications

Why raw LLM prompts fabricate stat suffixes, why MCP-augmented prompts do not, and the prompt template a broker can hand to Claude or ChatGPT today.

14 min read·Updated May 5, 2026

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