Is there an API for BSG decisions?

Yes. The REST API and the MCP server return decisions of the Federal Social Court and the regional social courts with full text and citations. The address https://klaracase.de/mcp/sozialrecht searches only the social courts.

Which books of the Social Code are included?

All twelve books from SGB I to SGB XII, plus SGB XIV, the SGG and the BKGG. Every provision is available on its own, with the decisions that cite it.

What does access cost?

Every call uses credits from your organization's balance, the same one the web app uses. A search costs 1 credit. The table above lists the price per tool. Your first organization receives 30 credits once, valid for 30 days.

How do I connect Claude, ChatGPT or Cursor?

Add the MCP address on this page as a custom connector. Claude and ChatGPT sign in with OAuth. Cursor and your own agents use an API token. The MCP documentation lists the steps for each client.

Are the case numbers in the answers real?

Every case number Klaracase returns points to a decision in the corpus, with court and date. You can fetch and read the full text at any time. The legal assessment stays with you.

API and MCP

German social law: court decisions and statutes via API and MCP

The case law of the social courts, from the Federal Social Court (BSG) to the regional social courts, ready for your software and your AI assistant. Pensions, health insurance and basic income support, each linked to the Social Code.

Decisions from 1954 to 2026.

https://klaracase.de/mcp/sozialrecht

Built and operated in Germany

Server location: GermanyOne dedicated server hosted by Hetzner in Germany. Backups are stored encrypted in Frankfurt (eu-central-1).

Recipients disclosedEvery service that receives data from you is named in the privacy policy, with its purpose and location.

Built in GermanyBuilt for German law: court decisions, statutes and citations from German sources.

Data processing. The AI services that receive your search query process it in the EU. The providers belong to companies based in the USA. More on privacy and security

In the corpus

Decisions: 54,000+
Courts: 3
Statutes: 15
Linked citations: 120,000+

Decisions from 4 August 1954 to 9 September 2026. Measured on 11 October 2026.

Example query

One question, one call, real case numbers

A recorded query from 11 October 2026. Every case number below exists in the corpus, and the excerpts are verbatim.

Question

When does a voluntary resignation trigger a waiting period for unemployment benefit?

Call

search_decisions({
  "query": "Wann tritt bei einer Eigenkündigung eine Sperrzeit beim Arbeitslosengeld ein?",
  "branch": "sozial"
})

Answer

S 5 AL 390/00 · Sozialgericht Dortmund · 12 October 2001
sich gegen Risikofälle wehren, deren Eintritt der Versicherte selbst zu vertreten hat, oder an deren Behebung er unbegründet nicht mithilft. Eine Sperrzeit tritt deshalb dann ein, wenn dem Arbeitnehmer unter …
S 5 AL 172/02 · Sozialgericht Dortmund · 17 April 2003
Sozialgericht Dortmund — Urteil vom 17.04.2003 — S 5 AL 172/02 | ECLI:DE:SGDO:2003:0417.S5AL172.02.00] [Entscheidungsgründe] 1Tatbestand: 2Die Beteiligten streiten über den Eintritt einer Sperrzeit vom 01.03.2002 bis zum 23.05.2002 und über einen Anspruch auf …
L 7 AL 70/20 · Hessisches Landessozialgericht 7. Senat · 20 October 2023
Kläger wendet sich gegen das Ruhen seines Arbeitslosengeldanspruchs im Zeitraum vom 1. September 2018 bis 31. Oktober 2018 wegen Eintritts einer Sperrzeit bei Arbeitsaufgabe. Der 1980 geborene Kläger war als angestellter Rechtsanwalt zunächst bei …

Use cases

Three ways to use Social law

Hospital billing

Find BSG decisions on payment for hospital services under § 109 SGB V and the regional social courts that cite them.

Reduced earning capacity pension

Your assistant reads the case law on § 43 SGB VI in full text and names the case number and date of each decision.

Housing costs

Bundle the decisions on § 22 SGB II into one datapackage for your agent.

Connect

Connect to Social law in a few minutes

This address searches the Social law area only. Claude.ai and ChatGPT sign in with your account. The other routes use a token.

Claude Code: run the command in a terminal and replace YOUR_TOKEN_HERE with your token.

claude mcp add --transport http klaracase-sozialrecht https://klaracase.de/mcp/sozialrecht \
  --header "Authorization: Bearer YOUR_TOKEN_HERE"

Claude.ai: add a custom connector and enter this address. You sign in with your account.

https://klaracase.de/mcp/sozialrecht

More in the documentation: MCP documentation, REST API documentation

Coverage

What Social law covers

Decisions by court

Court	Decisions
LSG	32,000+
SG	15,000+
BSG	6,400+

Most cited norms

Norm	Citing decisions
§ 193 SGG	34,000+
§ 160 SGG	17,000+
§ 54 SGG	12,000+
§ 177 SGG	8,500+
§ 144 SGG	8,200+
§ 197a SGG	8,100+
§ 153 SGG	7,500+
§ 183 SGG	5,500+
§ 151 SGG	5,000+
§ 86b SGG	4,900+

Most cited decisions

Case number	Court	Date	Cited by
B 12 KR 25/10 R	BSG	29 August 2012	470+
B 12 KR 16/13 R	BSG	18 November 2015	420+
B 12 KR 24/10 R	BSG	25 April 2012	390+
B 1 KR 8/11 R	BSG	8 November 2011	370+
B 12 R 17/09 R	BSG	28 September 2011	360+
B 14 AS 50/10 R	BSG	19 October 2010	350+
B 2 U 17/15 R	BSG	27 June 2017	330+
B 2 U 28/08 R	BSG	12 January 2010	330+

Statutes in this area

SGB I Sozialgesetzbuch (SGB) Erstes Buch (I) - Allgemeiner Teil - (Artikel I des Gesetzes vom 11. Dezember 1975, BGBl. I S. 3015)
SGB II Sozialgesetzbuch (SGB) Zweites Buch (II) - Grundsicherung für Arbeitsuchende
SGB III Sozialgesetzbuch (SGB) Drittes Buch (III) - Arbeitsförderung - (Artikel 1 des Gesetzes vom 24. März 1997, BGBl. I S. 594)
SGB IV Sozialgesetzbuch (SGB) Viertes Buch (IV) - Gemeinsame Vorschriften für die Sozialversicherung - (Artikel I des Gesetzes vom 23. Dezember 1976, BGBl. I S. 3845)
SGB V Sozialgesetzbuch (SGB) Fünftes Buch (V) - Gesetzliche Krankenversicherung - (Artikel 1 des Gesetzes v. 20. Dezember 1988, BGBl. I S. 2477)
SGB VI Sozialgesetzbuch (SGB) Sechstes Buch (VI) - Gesetzliche Rentenversicherung - (Artikel 1 des Gesetzes v. 18. Dezember 1989, BGBl. I S. 2261, 1990 I S. 1337)
SGB VII Siebtes Buch Sozialgesetzbuch - Gesetzliche Unfallversicherung - (Artikel 1 des Gesetzes vom 7. August 1996, BGBl. I S. 1254)
SGB VIII Sozialgesetzbuch (SGB) - Achtes Buch (VIII) - Kinder- und Jugendhilfe - (Artikel 1 des Gesetzes v. 26. Juni 1990, BGBl. I S. 1163)
SGB IX Sozialgesetzbuch Neuntes Buch – Rehabilitation und Teilhabe von Menschen mit Behinderungen – (Artikel 1 des Gesetzes v. 23. Dezember 2016, BGBl. I S. 3234)
SGB X Zehntes Buch Sozialgesetzbuch - Sozialverwaltungsverfahren und Sozialdatenschutz -
SGB XI Sozialgesetzbuch (SGB) - Elftes Buch (XI) - Soziale Pflegeversicherung (Artikel 1 des Gesetzes vom 26. Mai 1994, BGBl. I S. 1014)
SGB XII Sozialgesetzbuch (SGB) Zwölftes Buch (XII) - Sozialhilfe - (Artikel 1 des Gesetzes vom 27. Dezember 2003, BGBl. I S. 3022)
SGB XIV Sozialgesetzbuch Vierzehntes Buch - Soziale Entschädigung -
SGG Sozialgerichtsgesetz
BKGG Bundeskindergeldgesetz

Measured

Measured on real questions

Measured: without sources, three AI models cited 168 of 374 case numbers we could not confirm. With our data, 1 of 471.

See the benchmark for Social law

Cost

What a call costs

Every call costs a fixed number of credits. New accounts get 30 credits once, valid for 30 days.

Tool	Purpose	Credits
search_decisions	Search decisions	1
get_decision	Full text of one decision	1
get_norm	Current text of one norm	1
get_citation_graph	Citations of one decision	2
assemble_datapackage	Data package from several decisions	5
list_facets	List filter values	free

See pricing and plans

Questions

Frequently asked questions

More areas of law

Back to the overview of API and MCP

Start with Social law

Data processing. The API and the MCP server use the same search as the web app. OpenRouter and Voyage AI process the text of a search query in the EU. Citation Check examines texts on our server in Germany, without AI services. More on privacy and security