Knowledge index
Supreme Court Opinions (SCOTUS)
Supreme Court opinions from CourtListener: the syllabus and headnotes for each case, not the full opinion text.
Works with
Claude Code, Codex, Claude, ChatGPT, Grok and any MCP client
Domain
Legal
Size
13.4k opinions
Coverage
Syllabus and headnotes only
Example questions
Which opinions address qualified immunity for state officials?
Find cases decided on Commerce Clause grounds since 2000.
What did the Court hold about warrantless cell phone searches?
Use cases
Find relevant Supreme Court cases for a legal question.
Trace how a doctrine developed across terms.
Prepare case summaries from syllabi.
About this index
CourtListener, a Free Law Project service, publishes opinions of the Supreme Court of the United States. The syllabus and headnotes summarize each opinion’s holding and the questions decided. This Kapa index covers the syllabus and headnotes, not the full text, mirrored for agent search. Read the full opinion at the source before citing it.
Owner
Free Law Project (CourtListener)
Coverage
Syllabus and headnotes only
License and credit
Data comes from CourtListener, a Free Law Project service. Kapa provides this page and the MCP URL. It is not an official Free Law Project product and implies no endorsement. Credit Free Law Project when citing.
Caveats
Syllabi and headnotes summarize an opinion. Read the full opinion at the source before citing it.
Add to your agent
Copy the setup prompt and paste into your agent.
Or add it manually
MCP URL
https://courtlistener-scotus.mcp.kapa.ai
Claude Code
Codex
Claude
ChatGPT
Grok Bot
Other
claude mcp add --transport http
courtlistener-scotus
https://courtlistener-scotus.mcp.kapa.ai
Then run /mcp and finish sign-in in the browser.
Example
With the MCP, Claude cites the actual records
Same question, same model (Opus 5.5, high effort). Left: Claude with web search. Right: Claude with this index.
Normal Claude
Web search
With knowledge index
SCOTUS
MCP
Frequently asked questions
What is a knowledge index?
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A searchable index of a public data source, like NASA's aviation safety reports, that your agent can query over MCP.
How do I add one to my agent?
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How is this different from web search?
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Is it free?
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Are these official connectors?
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Can I create my own index?
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