Casus MCP
French tax and legal corpus for AI assistants
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Query French legal sources (tax code articles with version history, BOFiP administrative doctrine, 3.4M+ court decisions, tax treaties, EU law) from Claude, ChatGPT or any MCP client. Every answer links to the official source, and resolve_references checks legal citations. All tools are read-only. Requires a Casus Starter or Pro subscription.
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PH · launched Oct 30, 2026 · 2 upvotes (top 22%)
- Legal
- Data infrastructure
- Developer
- AI-native
- Commercial product
- Legal
- Developer Tools
- Artificial Intelligence
Similar launches
See all 77 similar launches →Could you build this?
Partial The MCP server and read-only tools are easy to vibe-code, but the value lies in a large, accurately versioned corpus of French tax code, BOFiP doctrine, and court decisions, plus reliable citation resolution. Building and validating that data is the hard part.
What it would actually take: Start with official open data from sources like Légifrance and DILA, then build an ingestion pipeline that parses legal texts, preserves article version history, and links citations. Implement a search index (full-text plus embeddings) and an MCP server on top. The hard parts are normalizing messy legal structures and keeping the corpus current, which benefits from legal domain expertise to validate citation logic.
Competitors
Other products that read as similar to this one : 77 launches clear the similarity bar, closest 8 shown.
Attention rank: #13 of 78 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 308 days after the earliest competitor.
- boe-mcp · ph · 2026-10-07 · 2 upvotes · similarity 0.54
- corporary · ph · 2026-10-19 · 2 upvotes · similarity 0.51
- Justiweb · ph · 2026-10-08 · 1 upvotes · similarity 0.49
- leis-mcp · github · 2026-11-01 · 18 upvotes · similarity 0.47
- Jurisprudencia.io · ph · 2026-10-20 · 1 upvotes · similarity 0.40
- Codice Fiscale Inverso · ph · 2026-09-21 · 1 upvotes · similarity 0.40
- RegAffairs AI · ph · 2026-10-11 · 1 upvotes · similarity 0.40
- Calcolo codice fiscale online · ph · 2026-09-13 · 3 upvotes · similarity 0.39
Other launches for this product
- No other launches for this product.