Massachusetts legal data from official sources, structured for AI and legaltech.
Access 140,267+ Massachusetts laws, regulations, court decisions and regulatory materials from Massachusetts government, judicial and regulatory institutions across 7 official portals. Search Massachusetts legal data directly or connect it to your AI agent, legaltech product or research workflow through Lawstronaut's API and MCP server. Every record is linked to its official source and structured in the same format used across more than 150 jurisdictions.
140,267+
Massachusetts legal records
7
official Massachusetts source portals
461
issuing authorities
Daily
updates
SEE IT ANSWER
Which Massachusetts regulation sets the data-security standards for protecting residents' personal information?
201 CMR 17.00 — Standards for the Protection of Personal Information of Residents of the Commonwealth, issued by the Office of Consumer Affairs and Business Regulation under M.G.L. c. 93H.
Source: Office of Consumer Affairs and Business Regulation — https://www.mass.gov/doc/201-cmr-17-standards-for-the-protection-of-personal-information-of-residents-of-the-commonwealth/download
Retrieved: 2026-08-05 · Version: 1 · Cited in-turn
The official Massachusetts sources we cover
Lawstronaut collects Massachusetts legal materials from official government, legislative, court, and regulator sources. Each record links back to its original source, with metadata such as issuing authority, publication date, legal link, portal, content type, and version where available.
Source categories: the state legislature and the Massachusetts General Laws · the Code of Massachusetts Regulations and agency rulemaking · state agencies and regulators on mass.gov · courts and the judiciary via a case-law aggregator
- Massachusetts Legislature (malegislature.gov)
- MAGILA — Massachusetts General Laws (malegislature.gov)
- Code of Massachusetts Regulations (mass.gov)
- Mass.gov (mass.gov)
- Massachusetts Board of Pharmacy (mass.gov)
- Massachusetts Court System (mass.gov)
- Court Listener (Massachusetts) — Supreme Judicial Court, Appeals Court, Superior Court, District Court, Land Court
Massachusetts legal source types covered
Massachusetts legal coverage includes primary legislation, secondary legislation, regulatory materials, court decisions, and legislative history where available.
Legislation & Regulations
The Massachusetts General Laws (MGL) and session laws from the Massachusetts Legislature (malegislature.gov), and administrative rules from the Code of Massachusetts Regulations (CMR) published on mass.gov — for example, 201 CMR 17.00 on the protection of personal information.
Legislative History
Bills, orders, and session-law records from the General Court of the Commonwealth of Massachusetts (malegislature.gov) where available, version by version, each tied to its source.
Regulatory Guidance & Enforcement
Agency regulations, guidance, and enforcement materials from Massachusetts regulators such as the Office of the Attorney General, the Office of Consumer Affairs and Business Regulation, the Division of Insurance, and the Board of Pharmacy, published in the CMR on mass.gov.
Case Law
Massachusetts court decisions — Supreme Judicial Court, Appeals Court, Superior Court, District Court, and Land Court — captured through a case-law aggregator (Court Listener), where available.
One Massachusetts legal data layer. Four ways to use it.
Lawstronaut API
Query Massachusetts laws, regulations, court decisions, regulatory guidance, and enforcement materials through a REST API. Use structured metadata, full text, Markdown, source links, and version history to power legaltech products, compliance workflows, and internal research tools.
GET /v2/contents?iso=US_MA&limit=20Lawstronaut MCP
Connect ChatGPT, Claude, Gemini, Cursor, and other AI agents to Massachusetts legal sources. Questions become live searches against the corpus and return citation-ready answers grounded in official Massachusetts materials — deployable in minutes, with no integration work.
AI Agent Integration
Give your legal AI agent same-turn provenance: it retrieves current Massachusetts legal materials — official source links, metadata, and full text — before generating an answer, with a citation and timestamp on every response.
Build with Lawstronaut
Build Massachusetts legal search, monitoring, compliance, research, and legal AI features without crawling, parsing, normalizing, and updating official sources yourself. We handle source discovery, ingestion, normalization, versioning, and change detection; you build the product.
What you can do with Massachusetts legal data
- Retrieve legal metadata, full text, Markdown, source links, and original source files where available
- Filter by jurisdiction, portal, issuing authority, authority type, language, status, and dates
- Access official legal links for citation and audit trails — citation, timestamp, and source link returned in the same turn
- Track point-in-time versions and article-level changes across Massachusetts legal materials
- Run Horizon Scanning — track what changed in Massachusetts law, when, and where, without manual monitoring
- Connect AI agents to official Massachusetts sources through MCP; use the API for search, monitoring, compliance, and AI ingestion workflows
- Build internal Massachusetts legal research tools without maintaining your own crawler stack
Why Lawstronaut for Massachusetts legal research
Massachusetts legal information is spread across the state legislature and the Massachusetts General Laws, the Code of Massachusetts Regulations, state agency portals on mass.gov, and the courts. For humans, that means slow research. For AI systems, it's a bigger problem: fragmented source access, inconsistent formats, missing provenance, and weak citation trails.
Lawstronaut turns those sources into one structured legal data layer — source links, metadata, full text, versioning, and API/MCP access. Your product or agent retrieves the legal source directly instead of relying on generic web search or unverified model memory. Every answer carries a citation, a timestamp, and a link to the official document — the provenance that makes a legal research platform defensible to auditors and regulators.
About Massachusetts legal coverage
Massachusetts is a US common-law jurisdiction with a codified body of statutes. Primary legislation is enacted by the General Court of the Commonwealth (the state legislature) and published as the Massachusetts General Laws (MGL) and session laws on malegislature.gov; administrative rules are compiled in the Code of Massachusetts Regulations (CMR) and published on mass.gov. Regulatory guidance and enforcement come from agencies such as the Office of the Attorney General, the Office of Consumer Affairs and Business Regulation, the Division of Insurance, and the Board of Pharmacy. Case law — from the Supreme Judicial Court, the Appeals Court, and the trial court departments — is captured through a case-law aggregator where available. Records are published in English.
Massachusetts law moves quickly: the General Court passes new session laws each session, agencies file frequent and sometimes emergency amendments to the CMR, and data-protection rules such as 201 CMR 17.00 under M.G.L. c. 93H are supplemented over time. Point-in-time data straight from the source is what keeps a Massachusetts legal research answer correct today.
Built for
Legaltech companies
Build Massachusetts legal search, monitoring, drafting, compliance, and AI research features without maintaining your own legal source pipeline.
Compliance & GRC teams
Monitor Massachusetts regulatory materials, guidance, enforcement updates, and legal changes across official sources — without a manual monitoring rota.
AI builders
Ground legal AI answers in official Massachusetts legal text, source links, and metadata — answers that survive an auditor.
Internal legal teams
Give lawyers and business users faster access to Massachusetts legal sources through AI agents and internal tools, without hiring a researcher per jurisdiction.
Frequently asked questions
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Start building with Massachusetts legal data today
Connect your AI to Massachusetts's legislation, regulations, and case law through MCP or the API.