Grounded legal AI for Vietnam.
Claude, ChatGPT, Gemini, Grok, Cursor or your own assistant does the reasoning. lawai.vn guarantees the article, its validity on a given date and its source, with a receipt for every citation. English translations for most articles.
Every answer carries a receipt
Not "Article 5 says X" but "Article 5 of this document ID, in force on this date, according to this source, checked at this time". Every response includes du_lieu_tinh_den, the data timestamp.
IN FORCE NOT YET IN FORCE EXPIRED UNDETERMINED
Machine-readable conclusions so your assistant can verify before it cites.
{
"ngay_tra_cuu": "2026-09-01",
"ket_qua": [{
"ma_vb": "VBHN-2025…-VPQH",
"so_hieu": "155/VBHN-VPQH",
"ten": "Luật Sở hữu trí tuệ (văn bản hợp nhất)",
"ket_luan": "CON_HIEU_LUC",
"hieu_luc_nguon": "vbpl_national",
"kiem_tra_luc": "2026-…",
"url": "https://tracuu.tudienphapluat.com/van-ban/…"
}],
"du_lieu_tinh_den": "2026-09-…",
"luu_y": "Kết quả phục vụ tra cứu, không thay thế tư vấn pháp lý của luật sư."
}
Built for three audiences
Law firms, including international firms in Vietnam
Citations with document ID, point-in-time validity and check timestamp. Verify hundreds of citations in one call. Reverse lookup from quoted text. Precedents linked to articles. English text for foreign colleagues.
In-house legal and compliance
Know what changed, what replaced what. A verified two-way relationship map. Seat plans for the whole team.
AI and legaltech developers
One standard MCP endpoint, Bearer key, JSON with data timestamps. Bring your own model. Usage-based pricing with volume discounts.
10 tools, one server
tra_cuu_phap_luatAsk in plain language, get the governing articles with a receipt
hieu_luc_tai_ngayWas this document in force on a given date?
hieu_luc_tai_ngay_nhieuBatch validity check, up to 100 citations per call
tim_theo_nguyen_vanReverse lookup: from quoted text back to the exact article
xem_van_banRead one article verbatim, English translation available
lich_su_thay_doiAudit trail: what the record changed, when, and from which source
quan_he_van_banTwo-way relationship map: basis, amends, replaces, repeals, guides
an_le_theo_dieuPublished precedents linked to an article, and the reverse
tim_ban_anFind published judgments by fact pattern, by the court's reasoning, or by exact phrase
thay_doi_tu_ngayDocuments whose validity changed since a date, for change monitoring
Legislation
Hundreds of thousands of source documents, point-in-time validity with provenance, English translations for most articles, and a per-document audit trail of data corrections.
Relationship graph
Basis, amendments, replacements, repeals, guidance. Only high-confidence edges validated against a hand-checked gold set.
Precedents
Published precedents linked to the exact articles they clarify, with the source judgment.
Published court decisions
Since 2017. Search by fact pattern, by the court's reasoning, or by exact phrase. Returns identification data, structured ruling fields and the court's publication link only. Full text is not provided.