> ## Documentation Index
> Fetch the complete documentation index at: https://docs.taxmaxi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# TaxMaxi: crypto tax infrastructure for developers

> TaxMaxi is an API-first platform that turns raw exchange and onchain activity into machine-readable, tax-ready events for fintechs, wallets, and AI agents.

TaxMaxi is open-source crypto tax infrastructure built for developers. Rather than exporting CSVs and importing them into a consumer tax tool, you connect TaxMaxi to your exchange or wallet and call an API to receive structured, jurisdiction-aware tax data. TaxMaxi handles transaction normalization, FIFO capital gains calculation, and income classification — so your application gets clean numbers instead of raw ledger entries. The first supported jurisdiction is Germany, with Coinbase as the first supported exchange.

## What you can build with TaxMaxi

TaxMaxi exposes three integration surfaces:

* **REST API** — call endpoints directly to create sources, trigger syncs, and retrieve tax summaries. The base URL is `https://api.taxmaxi.com` and the OpenAPI spec is available at `https://api.taxmaxi.com/openapi.json`.
* **JavaScript SDK** — a typed Effect-based client that wraps the REST API. Install it from npm and authenticate with a Bearer token.
* **CLI** — the `tax` command runs the full Coinbase workflow from your terminal. Install it globally with `npm install -g tax` and run `tax coinbase` to connect, sync, and calculate taxes in one step.

## Who TaxMaxi is for

TaxMaxi is designed for teams and individuals who need tax data as structured output, not a PDF:

* **Fintechs and exchanges** that need to surface tax liability data inside their own product
* **Neobanks and wallets** that want to offer tax reporting as a feature
* **AI agents** that require deterministic tax logic as part of a broader financial workflow
* **Developers** who want to automate crypto tax calculation without manual tools

## Supported integrations

| Area         | Support                               |
| ------------ | ------------------------------------- |
| Jurisdiction | Germany (FIFO capital gains + income) |
| Exchange     | Coinbase (via OAuth)                  |
| Onchain      | Any wallet address (Solana)           |

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">
    Make your first API call and retrieve a tax summary in minutes.
  </Card>

  <Card title="Authentication" icon="lock" href="/authentication">
    Register, log in, and attach a Bearer token to your requests.
  </Card>

  <Card title="API reference" icon="code" href="https://api.taxmaxi.com/openapi.json">
    Browse the full OpenAPI specification for all endpoints.
  </Card>

  <Card title="CLI" icon="terminal" href="/cli/overview">
    Run the full Coinbase workflow from your terminal with the `tax` command.
  </Card>
</CardGroup>