Launch — OpusLaw US
Real US case law,
now in every
OpusLaw tool.
Live SCOTUS, Circuit, district, and state court judgments, pulled directly from CourtListener and wired into ten surfaces across OpusLaw — /chat plus nine Practice Hub tools including Shepardize, Deep Research, Motion Generator, Trial Brief, and Judge Research. Grounded citations, verified in parallel with Google Search grounding.
Legal AI has always had one persistent weakness: citations. A model can produce beautiful prose about the Fourth Amendment and invent a Supreme Court case that never existed to support it. Opposing counsel finds the fabrication. You lose the motion. Your client loses confidence. Every attorney has either lived this or been a headline away from it.
Today, OpusLaw deepens its integration with CourtListener — the largest open-access US case law database, operated by the non-profit Free Law Project — across ten surfaces of the platform. Before any AI analysis begins, the relevant tool fetches actual cases from CourtListener\'s semantic search, Bluebook-format citations attached, and injects them into the model\'s context. The AI then reasons over verified authority rather than reconstructing from memory. The result: citations that exist, at the right court, decided on the right date, with the right holding.
Where to use it
Ten surfaces. One integrated US corpus.
/chat — Relevant Case Law
Ask any US legal question in chat. When the response is ready, tap Relevant Case Law and OpusLaw surfaces the actual judgments that matter — linked directly to the CourtListener opinion page. No more hunting for citations; the binding authorities are one tap away.
Legal Search, Legal Memo, Motion Generator, Trial Brief
The citation-heavy drafting surfaces now inject real US cases into the AI's working context before it writes anything. Binding SCOTUS and Circuit authority is quoted from the actual opinion rather than reconstructed from training data.
Statutory Research, Pleading Drafter, Universal Legal Expert
Cross-reference US statutes against the decisions that interpret them. Draft pleadings grounded in real authority the court will recognise. Run general US-law Q&A with the confidence that every case cited is a real opinion you can click through to read.
Shepardize — real citation lookup
Paste any US citation. OpusLaw resolves it on CourtListener's citation API, pulls the underlying opinion, and grounds the "good law / caution / overruled" analysis in the real text. The assessment is no longer an AI guess — it's a verified reading.
Deep Research — per-thread grounding
The multi-pass research agent runs four to six parallel research threads. Each thread now pulls CourtListener results in parallel with Google grounding, compounding the quality of the final memorandum at every angle of the analysis.
Judge Research — full CourtListener profiles
For US judges, OpusLaw already pulled structured profile data from CourtListener: appointment date, political affiliation, education, notable rulings, reversal rate. That stays — now alongside real case injection in every other tool.
How it works
Parallel, grounded, verified.
01
Automatic jurisdiction detection
OpusLaw detects your practising jurisdiction from your IP location. US attorneys are routed to CourtListener automatically. The jurisdiction dropdown in the navigation bar lets you override manually; the choice propagates to every tool without a reload.
02
Semantic search, not keyword match
OpusLaw uses CourtListener's vector-based semantic search for case law queries. A natural-language question like "Fourth Amendment cell phone search incident to arrest" returns the right cases — Riley, Chimel, Robinson — without having to guess which keywords will trip the search engine.
03
Parallel grounding
Every tool fetches Google Search grounding and CourtListener case law simultaneously via Promise.all. Three-second preFetch instead of seven. No waterfall. The AI sees both sets of context together when it starts writing.
Built for US practice
The end of hallucinated citations.
Generic AI tools generate prose first and figure out citations second — which is why the bad ones routinely invent cases. OpusLaw flips the order: real cases retrieved first, then analysis written around them. Every authority the AI cites is a case that actually exists, at a court that actually decided it, on a date you can verify with a single click.
SCOTUS to district court
CourtListener indexes 3,358 US jurisdictions. OpusLaw surfaces what's relevant to the query, whether that's a Supreme Court decision or a district court opinion from your circuit.
Bluebook-ready citations
Citations returned match the format US courts and law reviews expect. Volume, reporter, page, year, precedential status — all parsed from the CourtListener metadata.
Citation-verified output
Every case the AI cites in output was actually present in the CourtListener response. If the system couldn't find a real case, it won't fabricate one to fill space.
Silent failure by design
If CourtListener is rate-limited or briefly unreachable, the tool falls back to Google grounding and AI analysis. No error banner, no interrupted draft, no mention of the backend in the UI.
Ten integrated surfaces
Relevant Case Law in /chat, plus nine Practice Hub tools: Legal Search, Legal Memo, Motion Generator, Trial Brief, Pleading Drafter, Statutory Research, Universal Legal Expert, Shepardize, Deep Research, and Judge Research.
Full parallel to India
The same architecture serves Indian users via Indian Kanoon. Jurisdiction-aware at every layer, so an attorney's OpusLaw experience is anchored to the law that actually applies where they practise.
"The cases it cites are the cases that actually control the issue. That alone changes what AI can do for litigation."
Partner, AmLaw 200 Litigation Group
A note on attribution
CourtListener is operated by the Free Law Project, a non-profit dedicated to making the law more accessible to everyone. Their free and open access to the US judicial record is what makes grounded legal AI possible at scale. We encourage every attorney who benefits from this integration to visit courtlistener.com directly for deeper research and to consider supporting the Free Law Project\'s work.
This launch covers every surface of OpusLaw where US case law meaningfully improves the output — ten integrations in all, matching the parallel work we\'ve done for Indian users via Indian Kanoon. Further work is already on the roadmap: deeper PACER/RECAP integration for federal docket analytics, structured citation-network traversal in Shepardize, and judicial financial-disclosure data in Judge Research. If there is something specific your practice needs, we would welcome the conversation.
— The OpusLaw Team
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Jurisdiction is detected automatically. No setup required.