DeepXiv · Law · Judgments (cases)

Court judgments: 17.49M from China (2.65M criminal plus 14.83M civil / administrative / enforcement) and 3.44M US opinions (country=us, tier A). Brief-level hybrid retrieval with LLM-extracted structured fields. Chinese judgment text needs the cases:fulltext grant (the originals carry personal data); US full text waits on the PG store.

Corpus: 27,580,773 documents.

Setup

pip install -U deepxiv-sdk      # deepxiv registers a token on first use

With a registered key (https://data.rag.ac.cn/register), search and read are fair use: 60/min, 5 at once, 5,000/day; on the auto-registered token they spend the deepxiv daily limit at the credits listed below. ask draws on the daily ask allowance (resets 00:00 UTC; a site-wide daily total can run out early at peak times), or 3 lifetime trial asks on the auto-registered token. On 429, back off for Retry-After seconds. Data goes to stdout; cost, quota and sources go to stderr. Exit 0 ok, 1 API error, 2 usage error. The general CLI guide is the deepxiv-cli skill.

Start here

deepxiv fa search cases "网络刷单诈骗 未遂" -F province=浙江省 -F "judge_year>=2018" -k 5
deepxiv fa search cases "qualified immunity police" -F country=us -F court_level=scotus -k 5   # US cases filter on year, not judge_year
deepxiv fa read cases us:10316651 -l brief   # TikTok v. Garland; the holding comes in English and Chinese
deepxiv fa read cases 8a1c3791-0cce-4094-9b28-a9a600b657c7   # detail: every extracted field, no grant needed
deepxiv fa ask "网络刷单诈骗未遂一般怎么判" -d cases   # answers from Chinese judgments only

Free samples: ids 8a1c3791-0cce-4094-9b28-a9a600b657c7, us:577203; queries 网络刷单诈骗 未遂.

Search

deepxiv fa search cases "query" [-F FILTER]... [-k N] [--offset N] [--mode M] [--head] [--json]

Modes: hybrid, dense, bm25. Up to 100 hits. Cost 2 (with --head: 3). An empty query is rejected; use "*" to list by filters only. Filters combine with AND; an undeclared field exits 2.

Advanced filters (see deepxiv fa spec cases): city, court_level, trial_round, decided_at, laws, sentence_type, sentence_months, probation, fine_amount, law_names, org_parties, status, district, circumstance_tags, procedural_posture, court_id, docket_number, statutes_cited, issue_tags, party_names, standard_of_review, holding_by, citation_norm, tier, jurisdiction.

Read

deepxiv fa read cases ID [ID...] [-l brief|detail|full] [-e EXTRA] [-p k=v]... [-f json|md|html]

At -l full, -p section=NAME reads one section and -p characters=N the first N characters.

Facets

deepxiv fa facets cases FIELD lists the legal values and counts, free. Use it instead of guessing a spelling. Fields: cause, province, court_level, trial_round, sentence_type, circumstance_tags, proceeding_type, subject_areas, disposition, prevailing_party, precedential_status, procedural_posture.

Ask

deepxiv fa ask "question" -d cases [-e low|medium|high] [-p k=v]... [--no-stream] [--json]

Q&A over judgments: served by the same agent as the law domain (which already combines 'find the governing articles, then see how comparable judgments ruled'); scope defaults to case, i.e. judgments only. Answers cite [case number], with sources.cases / coverage as in law

Always pass -d cases: automatic domain picking is still early.

What this corpus will and will not tell you

• China: 2.65M criminal judgments fully extracted, mostly 2014–2019 (2020–2021 nearly empty); 14.83M civil / administrative / enforcement judgments finished ingesting on 2026-10-07. US (country=us): tier A only (3.44M); the ~6.63M tier-B long tail is not indexed. Every response carries coverage.
• A case number in the query resolves exactly first.
• Chinese judgment text is not served by default: the original documents carry party names, dates of birth and home addresses, so this API exposes only the parsed layer (level=brief / detail). level=full / section / preview need an API key carrying the cases:fulltext grant — without it the call is a 403 and costs nothing.
• At level=brief / detail the verdict, sentence, facts and reasoning are all model extractions (sentencing is derived from the verdict by regex); cite the official Chinese judgment site for anything formal.
• country=us ids look like us:577203 — reading one needs no country parameter; full text (level=full / section / preview) is not available yet, pending the move of the opinion store into PG.
• US holdings, issues and dispositions are model-extracted; cite CourtListener for anything formal.
• Ask goes through /v1/law/ask (scope=case, Chinese judgments only for now).

Limits

• Grant cases:fulltext: Verbatim text of Chinese judgments (whole, by section, or first N characters). Off by default: the originals carry party names, dates of birth and home addresses (58% of a 400-judgment sample had an unmasked name). level=detail already has every extracted field. Issued on request, not self-serve.

Citing

Cite records as [（2018）闽0181刑初1319号]. Say plainly when the corpus has nothing.

Generated by scripts/gen_fa_skills.py from deepxiv fa spec cases --json on 2026-10-19. Field names and prices can change; deepxiv fa spec cases is the live source.