Klaracase skills for coding agents

These skills teach a coding agent to use Klaracase. Klaracase holds German court decisions and German statutes, linked by a resolved citation graph. It covers German law only.

Klaracase is a research tool. It finds and verifies sources. It gives no legal advice and does not replace a lawyer's review.

What is inside

Part	What it does
skills/klaracase-citation-check	Runs a citation check on a German legal text. It reports one of seven verdicts per citation and tells the agent how to read them. A not_found verdict means the citation was not found in the corpus. It is not a claim that the citation is fabricated.
skills/klaracase-german-legal-research	Searches and reads German case law and statutes. It tells the agent which tool fits which question, how to phrase German queries, and how to cite only what a tool returned.
.mcp.json	Connects the Klaracase MCP server, https://klaracase.de/mcp.
.claude-plugin/	Packages both skills and the MCP connection as a Claude Code plugin.
tools/anthropic-tools.json	The nine Klaracase operations as Anthropic tool_use tool definitions, for agents that call the REST API. Built by scripts/anthropic-tools.py.
AGENTS.md	A short brief for any agent that reads AGENTS.md.

Each skill has two ways to reach Klaracase. The MCP server is the main way. The REST API at https://klaracase.de/api/v1 does the same with a token and curl.

Install

Claude Code

claude plugin marketplace add klaracase/skills
claude plugin install klaracase@klaracase

The plugin adds both skills and the MCP connection. Run /mcp in Claude Code to sign in to Klaracase. You can also give a token (see "Credits and account").

Codex, Cursor, Copilot, Gemini CLI, OpenCode

npx skills add klaracase/skills

This writes the skills to .agents/skills/. These agents read that folder. The skills command sends anonymous usage data. Set DO_NOT_TRACK=1 to stop that.

You still need to connect the MCP server in your agent, or give the agent a token for REST. The server URL is https://klaracase.de/mcp. The same token works on both.

A custom agent

1. Paste the text of a SKILL.md file into the system prompt of your agent. Load the files in references/ when the skill asks for them.
2. Connect the MCP server https://klaracase.de/mcp, or let the agent call the REST API. For REST, tools/anthropic-tools.json holds ready tool definitions.

Official SDKs for Node, Python, PHP, Go and Rust: see the Klaracase GitHub organization.

What is sent where

• The skills are plain text files. They send nothing.
• Tool arguments go to klaracase.de only. Search text is processed in the EU.
• check_citations saves each check in your Klaracase account. It deletes the input text after 90 days. It keeps the findings.
• The agent sends the text you give it to the model that runs your agent. That part depends on your agent, not on Klaracase.

Privacy policy: https://klaracase.de/privacy

Credits and account

• Create a token at https://klaracase.de/settings/api-tokens. You need a login and a verified email. The token works on MCP and on REST. It is bound to the organization that is open when you create it.
• A new verified account gets 30 free credits, valid for 30 days.
• corpus_coverage and list_facets are free. search_decisions, cross_type_search, get_decision and get_norm cost 1 credit. get_citation_graph costs 2. assemble_datapackage costs 5. A citation check costs 2 credits up to 10,000 characters, 3 up to 15,000 and 4 at 20,000.
• The same call again in the same credit period costs 0.
• Credits renew per credit period: the UTC calendar month for free organizations, the paid billing period for subscribers. Unused credits do not roll over.

Limits

• 60 requests per minute per token. Over that, the server answers 429 with the seconds to wait. Nothing runs.
• A citation check takes 50 to 20,000 characters through MCP and REST. Longer documents go to the Citation Check in the Klaracase web app.
• Daily caps depend on the plan. The free plan allows 1,000 rows and 40 documents a day.

Links

• Docs: https://klaracase.de/docs
• MCP tools: https://klaracase.de/docs/mcp
• REST API: https://klaracase.de/docs/api
• Support: https://klaracase.de/support

License

MIT. Copyright (c) 2026 SPARQ VENTURES UG (haftungsbeschränkt).