CourtListener
Connect your agent to CourtListener for US federal and state opinions, dockets, judges, and eCFR regulations while researching legal or govtech ideas.
Overview
CourtListener MCP is a MCP server for the Idea phase that exposes US court opinions, dockets, judges, and eCFR regulations to agents via the CourtListener API.
What is this MCP server?
- Streamable HTTP MCP at courtlistener-mcp.vaquill.ai/mcp/
- US federal and state opinions, dockets, and judge metadata via CourtListener REST API
- Includes eCFR regulations access alongside case-law tooling
- Single required header X-CourtListener-Token; free token from courtlistener.com help API docs
- Server version 0.1.0; does not store your CourtListener API key
- One required secret header: X-CourtListener-Token
- Data domains: US federal and state opinions, dockets, judges, plus eCFR
Community signal: 1 GitHub stars.
What problem does it solve?
US legal and regulatory facts scattered across CourtListener and CFR sites slow down agent-assisted scoping when you need structured docket and opinion data.
Who is it for?
Indie builders and small teams prototyping US legal research, regtech, or citation-aware agents with a free CourtListener token.
Skip if: Canadian-only research workflows, builders avoiding hosted remotes, or products that need guaranteed SLAs without your own API planning.
What do I get? / Deliverables
Once registered, your agent can fetch CourtListener-backed opinions, dockets, judge metadata, and eCFR content inside the same workflow as your codebase.
- Structured US opinion, docket, judge, and eCFR query results in agent sessions
- Grounded research snippets for specs citing CourtListener sources
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Journey fit
US primary-law discovery is a pre-build research task; the canonical shelf is idea before you encode court or regulatory assumptions into code. Research covers pulling real opinions, dockets, and CFR references—not shipping a production legal product.
How it compares
US CourtListener plus eCFR MCP connector, not the Canadian CanLII MCP or Vaquill’s multi-jurisdiction legal API.
Common Questions / FAQ
Who is CourtListener MCP for?
Solo developers using MCP clients who need US case law, dockets, judges, and CFR data while researching or building legal-adjacent agent features.
When should I use CourtListener MCP?
During idea or validate research when product scope depends on real federal or state opinions, docket structure, or eCFR regulatory text.
How do I add CourtListener MCP to my agent?
Add remote https://courtlistener-mcp.vaquill.ai/mcp/ with header X-CourtListener-Token set to your free CourtListener API token.