Vaquill
Connects Claude to Vaquill's legal research API covering US federal and state law (USC, CFR, CourtListener cases) plus 31 million Indian judgments and 23,000 acts. You get semantic search across statutes, boolean keyword search for case law, citation resolution in multiple formats (SCC, AIR, MANU), and citation graph traversal to see which cases cite or overrule others. The ask_legal_question tool runs AI-powered Q&A in standard or deep mode. Supports both streamable HTTP for Claude.ai and local installation via uvx. Requires a Vaquill API key and consumes credits per call. Reach for this when you need programmatic access to primary legal sources or want to trace precedent chains in Indian case law.
- GitHub stars
- 9
- tools
- 21
- auth
- Secret needed
- transport
- HTTP
- last updated
- Nov 6, 2026
Tools
21 toolsPublic tool metadata for what this MCP can expose to an agent.
search_us_statutesHybrid semantic + keyword search; filter by corpusType, state, titleNumber, chapter, year, and more.
Hybrid semantic + keyword search; filter by corpusType, state, titleNumber, chapter, year, and more.
No parameter schema in public metadata yet.
get_us_statute_sectionSection metadata by actId (citation, hierarchy, official-source links).
Section metadata by actId (citation, hierarchy, official-source links).
No parameter schema in public metadata yet.
get_us_statute_section_textFull HTML + plain text of a section.
Full HTML + plain text of a section.
No parameter schema in public metadata yet.
get_sections_batchMetadata for up to 50 sections in one call.
Metadata for up to 50 sections in one call.
No parameter schema in public metadata yet.
resolve_statute_citationResolve a Bluebook citation (e.g. 42 U.S.C. § 1983) straight to its section.
Resolve a Bluebook citation (e.g. 42 U.S.C. § 1983) straight to its section.
No parameter schema in public metadata yet.
list_statute_divisionsBrowse the statutory hierarchy one level at a time.
Browse the statutory hierarchy one level at a time.
No parameter schema in public metadata yet.
list_statutes_coverageSelf-describing coverage matrix: which corpora exist in which jurisdiction.
Self-describing coverage matrix: which corpora exist in which jurisdiction.
No parameter schema in public metadata yet.
get_section_neighborsThe sections immediately before and after, in statutory order.
The sections immediately before and after, in statutory order.
No parameter schema in public metadata yet.
get_section_definitionsThe defined terms that govern a section, from its chapter's definitions section.
The defined terms that govern a section, from its chapter's definitions section.
No parameter schema in public metadata yet.
get_section_cited_byWhich USC/CFR sections cross-reference this one (the inverse of crossReferences).
Which USC/CFR sections cross-reference this one (the inverse of crossReferences).
No parameter schema in public metadata yet.
get_section_cross_stateProvisions in other states addressing the same subject, ranked by similarity.
Provisions in other states addressing the same subject, ranked by similarity.
No parameter schema in public metadata yet.
get_section_changesWhat our refreshes observed changing on this section over time.
What our refreshes observed changing on this section over time.
No parameter schema in public metadata yet.
get_pricingLive API credit pricing (free, no auth).
Live API credit pricing (free, no auth).
No parameter schema in public metadata yet.
searchGeneric one-string corpus search returning {id, title, url}.
Generic one-string corpus search returning {id, title, url}.
No parameter schema in public metadata yet.
fetchGeneric one-string retrieval returning {id, title, text, url, metadata}.
Generic one-string retrieval returning {id, title, text, url, metadata}.
No parameter schema in public metadata yet.
search_actsSearch Indian legislation down to the section.
Search Indian legislation down to the section.
No parameter schema in public metadata yet.
list_actsBrowse and filter enactments by jurisdiction, regulator, year, status.
Browse and filter enactments by jurisdiction, regulator, year, status.
No parameter schema in public metadata yet.
list_act_filtersThe filter vocabulary the corpus actually holds, with counts.
The filter vocabulary the corpus actually holds, with counts.
No parameter schema in public metadata yet.
get_act_textSource links (text, PDF, HTML) for one enactment.
Source links (text, PDF, HTML) for one enactment.
No parameter schema in public metadata yet.
get_act_amendmentsAmendment history: what changed, by which Act, effective when.
Amendment history: what changed, by which Act, effective when.
No parameter schema in public metadata yet.
get_corresponding_provisionsMap a repealed criminal code to its 2023 replacement (IPC to BNS, CrPC to BNSS).
Map a repealed criminal code to its 2023 replacement (IPC to BNS, CrPC to BNSS).
No parameter schema in public metadata yet.
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vaquill-mcp
MCP server for Vaquill legal research API. Covers US federal and 50-state primary law: USC, CFR, state statutes and regulations, state and US constitutions, court rules, the Federal Register, executive orders, and agency guidance. Search primary law, resolve statutory citations, browse the hierarchy, and ground answers in official sources, all from your AI tools.
Quick Start
Prerequisites
Sign up at app.vaquill.ai/auth/signup to get your API key (new accounts get 1,000 free API credits, no card required). Steps for AI agents: vaquill.ai/agents.
Claude.ai (Web)
No installation needed. Add as a remote MCP server from Customize > Connectors > Add custom connector:
Option A: Bearer token (recommended)
Open the Request headers section of the same dialog and add the credential there:
URL: https://mcp.vaquill.ai/mcp
Header name: Authorization
Header value: Bearer vq_key_your_key_here
Details
- Repository
- github.com/vaquill-ai/vaquill-mcp
- Category
- Search & Web Crawling
- Transport
- HTTP
- Auth
- Required
- Registry
- MCP registry, active
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