> This page is for version v6.0 (default).
> For other versions, use one of these documentation indexes:
> - v6.0 (default): https://docs.zip.tax/v-6-0/llms.txt
> - v5.0: https://docs.zip.tax/v-5-0/llms.txt

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

# Ziptax for Platforms

> Get sales tax calculation and collection right, and give every merchant the compliance coverage they need, without having to become a sales tax expert.

One integration. Full compliance for every merchant.

Get sales tax calculation and collection right, and give every merchant the compliance coverage they need, without having to become a sales tax expert.

## 1. Who's who

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![Ziptax](/_fern-files/ziptax.docs.buildwithfern.com/d8db6561804abc96d23c5c308c8bc09836ac258f02e30340bfa42354068c0a51/docs/assets/ziptax-logo-long.svg)![Ziptax](/_fern-files/ziptax.docs.buildwithfern.com/e9f1ceecd9392f8776d40921a65147a17ed009c5c5d05f2ac0b590c1c8218d01/docs/assets/ziptax-logo-long-dark.svg)

The platform

You, the platform

The software that powers many businesses: a CRM, SaaS product, or marketplace.

**1 : many**

one platform,\
many merchants

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![TaxCloud](/_fern-files/ziptax.docs.buildwithfern.com/59a13a4105d24339d33f1ac65c2cb4185b2717dbd98064c236a122667c0dfb73/docs/assets/taxcloud-logo.svg)

The merchants

Your merchants

The businesses running on your platform, each responsible for their own sales tax.

## 2. The full sales tax picture

Platform side

Real-time calculation and collection, via the Ziptax Rate API.

* **Calculate**Ziptax returns the exact rate for each order or invoice.
* **Collect**The platform charges the buyer the correct tax at sale.

Merchant side

Each merchant's compliance, in one of two models. For TaxCloud-connected merchants:

* **Report**Collected tax flows to the merchant's TaxCloud account.
* **File**Returns are filed and remitted to each tax authority.

Ziptax and TaxCloud cover a TaxCloud-connected merchant from transaction to filed return. For self-managed merchants, Ziptax calculates their cart tax directly, your platform tracks their nexus, and they file on their own.

## 3. What's in it for each side

For the platform

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  Right tax on every transaction, out of the box.
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  Offer full compliance without building it.
* <polyline points="20 6 9 17 4 12" />

  No tax support burden, TaxCloud handles it for connected merchants.

For the merchant

* <polyline points="20 6 9 17 4 12" />

  Peace of mind, from tracked nexus to full compliance.
* <polyline points="20 6 9 17 4 12" />

  Backed by TaxCloud's tax experts when connected.
* <polyline points="20 6 9 17 4 12" />

  From "looks right" to actually filed with TaxCloud.

## Start building

#### [REST API](rest-api/overview)

Look up door-level accurate rates by address, coordinates, or postal code
for every order or invoice.

#### [Merchant Management](merchant-compliance-solutions/merchant-management)

Create and manage the merchants you serve, whether TaxCloud handles their
compliance or they manage their own.

#### [Self-Managed Merchants](merchant-compliance-solutions/self-managed-merchants)

Calculate cart tax with Ziptax's own engine and track each merchant's
physical locations and economic thresholds, while they handle their own
filing.

#### [Merchant Transactions](merchant-compliance-solutions/transactions)

Calculate cart tax, record orders, manage exemption certificates, and issue
refunds on behalf of each connected merchant.