# Taxinger

> Crypto tax computed from a person's own wallets and exchange statements, by the law of the country they are taxed in, and stated as the lines of that country's tax form. Taxinger computes for Austria, Germany, Spain, United Kingdom, Greece, Italy, Japan, Poland and Portugal.

One address answers agents: https://taxinger.com/mcp (MCP over Streamable HTTP).

- With no account it answers a country's law for a tax year: what is taxed, at what rate, on which form, when the return is due, each with the provision behind it. It answers the stories Taxinger publishes too. Such a call carries a Web Bot Auth signature (Ed25519, RFC 9421, over a key published at the caller's own well-known directory); an unsigned one is refused with how to sign and where to authorize.
- With a person's account, once they have consented (OAuth 2.1 with PKCE; a client ID metadata document, or registration), it answers their tax years, the items a year still needs an answer on, their transactions and the link to their tax document, and it writes their answers back.
- What only the person may do is handed back to them by a link. Paying is theirs: the tool makes a step and the client shows them its URL.
- An agent may hold an account of its own, made with a mailbox of its own for the person it works for ("agent": true on the sign-in that makes it). Such an account reads a history and pays for it like any other; it gives no access to another account and takes none, until a person holds it with a passkey or a second way in. That mailbox is then the only way in, and a mailbox lost is a history lost.

## Start here

- [MCP server](https://taxinger.com/mcp): one address. Call an account's tool with no token and the refusal says where to authorize; run the flow, and the same call answers.
- [What an agent can do here](https://taxinger.com/agents): the path an agent walks by itself, and the steps it hands to a person.
- [Prices](https://taxinger.com/pricing): the first 250 transactions of a history are free, then transaction packs bought once, or an annual plan. Payment is not open yet, so nothing can be bought today; the free allowance is read and computed as it always is. A year's declaration file needs a plan. The price is the same whoever asks, and paying is the person's own act.

## What it is

- [Documentation](https://taxinger.com/docs): what is read, how a year is computed, what an accountant may do, what is charged.
- [The law by country](https://taxinger.com/guides): every country Taxinger computes for, its rules by year, and the provisions they are read from.
- [News](https://taxinger.com/news): changes to crypto tax law, by country.
- [Release notes](https://taxinger.com/updates): what is new in Taxinger.

## What it is not

- Not an exchange, a wallet or a custodian: Taxinger reads public chain data and the statements a person uploads, and holds nobody's keys.
- Not a filing service: it produces the document a tax office reads and the file that country's authority publishes the format of. Carrying either to the office is the taxpayer's own act.
- Not advice: it states the law as code, with the provision each answer comes from.