Developers

Klaracase for developers: API, MCP server and SDKs

One API token, three ways to the same data: REST API, MCP server and SDKs. Here you find the documentation, the OpenAPI file, the packages and the limits.

Create an API token API reference

Start

First call in three steps

Create an API token
Sign in and create a token. It works for the REST API and the MCP server. You choose a life of 30, 90, 180 or 365 days, the default is 365.
Create a token
Send a call
You find an example on the case law API page.
Case law API
Install an SDK
The packages are listed below.

A token carries up to five abilities: search, read, graph, datapackage and citation-check. Grant only the abilities your code needs.

REST

REST API and OpenAPI file

The REST API under /api/v1 offers the same functions as the MCP server. The OpenAPI file is public and needs no token. Errors come as problem+json with a stable value in the field code.

MCP

MCP server

The MCP server runs at the address below (streamable HTTP). Sign in with OAuth 2.1 and PKCE, or with the same bearer token as the REST API. Clients that cannot use a remote server can use the bridge npx mcp-remote.

Address of the MCP server

https://klaracase.de/mcp

Single areas of law have their own addresses, for example /mcp/steuerrecht.

Packages

SDKs

There are packages for five languages. Each package has its own repository.

Language	Package	Install	Source
JavaScript and TypeScript	@klaracase/sdk	Not published yet	Repository
Python	klaracase	Not published yet	Repository
PHP	klaracase/klaracase	Not published yet	Repository
Go	github.com/klaracase/klaracase-go	Not published yet	Repository
Rust	klaracase	Not published yet	Repository

Agents

Agent skills

For Claude Code there are skills for research in German case law and for checking citations. You install them from the marketplace:

Not published yet

Repository

Prices

Limits and prices

Each token may send 60 requests per minute. Citation checks, datapackages and file uploads are limited to 10 requests per minute.

Every function has a fixed price in credits. The corpus overview, the filter lists and uploads are free.

Call	Credits
Search	1
Read a decision	1
Look up a norm	1
Citation network of a decision	2
Datapackage	5
Citation check, by length	from 2

Anyone who signs up with a confirmed e-mail address gets 30 credits once, valid for 30 days. After that the plans on the pricing page apply.

Daily caps on rows and documents apply per plan. They are listed in the API reference. To the pricing page

Help

Help and changes

The support page answers questions. Observable changes to the API and MCP are in the changelog.

Klaracase is not affiliated with any court or the federal government.