OpenCase
Claude connectorCommunityCheck every citation and quotation in legal writing against the law itself, and answer legal questions with verified authority.
OpenCase checks legal writing against the law. It confirms that the cases, statutes, and regulations a brief, memo, or contract cites exist as cited, that quoted language appears word for word in the source, and whether a case is still good law. It also answers legal questions with authority it has retrieved and verified.
Tools:
- Verify citations in legal text: finds every citation in a document and checks each one.
- Resolve legal citations: checks a list of citations and returns source details.
- Check a quotation: confirms a quote appears word for word in the authority, honoring ellipses and brackets.
- Get legal authority: retrieves one authority's metadata and text.
- Check case validity and Get case treatments: report a case's good-law flag and the decisions that cited it.
- Research a legal question and Review document against law: return cited answers and grounded findings.
- Detect legal citations: lists citations and their positions without checking them.
- Search federal court dockets and Get a docket filing: search CourtListener RECAP.
Coverage spans US federal and state law and many other jurisdictions. OpenCase is a research tool, not a lawyer: a citation it cannot find may still exist, and a verified citation still needs a lawyer's judgment. Requires an OpenCase account, which you can create while connecting. Free accounts include 10 tool calls a day; a paid plan removes the limit.
- Tools
- 11
exposed by this connector
Movement
From our daily snapshots over the last 30 days.
Rank by popularity
Rank by trending score
Popularity score
Trending score
In its category
How this connector compares with others in the same category. Positions are counted within the category, not across the whole directory.
Legal121st of 520 by popularity · 34th of 239 by trending score
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 119 |  Precedentes - Jurisprudência do STF e STJ | 8,555 | 22,145 #100 | 6places down |
| 120 |  Advogalia | 8,547 | 20,123 #121 | 64places down |
| 121 | 8,547 | 39,728 #34 | 4places up | |
| 122 | 8,531 | 15,681 #155 | 99places down | |
| 123 |  Lenz | 8,504 | 5,509 #231 | 87places down |
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 32 | 40,041 | 20,710 #1 | 17places down | |
| 33 |  Taiwan Legal RAG | 39,967 | 9,101 #100 | 440places up |
| 34 | 39,728 | 8,547 #121 | 192places down | |
| 35 |  Precedent AI | 39,240 | 5,700 #249 | — |
| 36 |  Filevine | 36,586 | 12,668 #33 | 3places down |
Also on other marketplaces
Tools
- check_case_validity
- check_quote
- detect_legal_citations
- get_case_treatments
- get_docket_filing
- get_legal_authority
- research_legal_question
- resolve_legal_citations
- review_document_against_law
- search_dockets
- verify_citations_in_text
- Categories
- Made by
- OpenCase Inc. · Website
- Sign-in
- Required
- Connector URL
- https://www.opencase.com/mcp
- Transport
- Streamable HTTP
- Works with
- Claude, Claude API, Claude Code, Claude Desktop
- Added
- September 29, 2026
- More info
- Sponsorship
- Promote this connector