# Federal Register API MCP > Federal Register API provides direct access to official US government rules and public notices. This MCP lets your AI agent query thousands of active documents, audit agency publications, and retrieve precise metadata from federal sources without needing manual searches on government websites. It's the authoritative way for analysts and legal teams to integrate real-time regulatory data into their workflow. ## Overview - **Category:** knowledge-management - **Price:** Free - **Tags:** public-policy, regulatory-data, us-government, document-auditing, administrative-law ## Description When you need to track what the U.S. government is actually doing—from new regulations to minor policy notices—you can't rely on simple keyword searches. The Federal Register API connects your AI agent directly to this authoritative source of public law and administrative rules. Instead of navigating complex, siloed government portals, you ask your agent a question in plain English: 'What changes did the EPA make regarding water quality last month?' Your agent finds the answer instantly, pulling out key document details and publication dates. This makes deep-dive regulatory research feel like a natural conversation. By accessing this data through Vinkius, you get to run complex policy audits right from your preferred client, whether it's Cursor or Claude. You don't just read notices; your agent acts as a real-time administrative consultant that verifies and structures the raw governmental data for immediate use. ## Tools ### check_api_status Confirms whether the Federal Register service is currently online and available for use. ### get_federal_document_details Retrieves the full metadata, official link, and details for one specific federal document number. ### list_federal_agencies Generates a complete list of every government agency that publishes rules in the Federal Register. ### search_federal_documents Searches for public documents and regulatory notices across the entire Federal Register using keywords or date ranges. ## Prompt Examples **Prompt:** ``` Search for documents about 'environmental protection' in the Federal Register. ``` **Response:** ``` I've retrieved several documents about environmental protection! Notable entries include rules from the EPA and notices regarding new sustainability standards. Would you like the full details for the top matches or the agency metadata? ``` **Prompt:** ``` Show details for Federal Register document '2023-00001'. ``` **Response:** ``` I've retrieved the details for document 2023-00001! It is titled [Title] and was published by [Agency]. I can provide the official link to the full text and the publication date metadata for you. ``` **Prompt:** ``` List all agencies that publish in the Federal Register. ``` **Response:** ``` I've scanned the agency catalog! There are hundreds of federal entities listed, including the EPA, Department of Energy, and the FDA. I can help you search for specific documents from any of these thematic clusters. ``` ## Capabilities ### Search public rules and documents Your agent searches across thousands of federal public records using keywords, dates, or agency names. ### Identify publishing agencies You can get a comprehensive list of every government body that publishes notices in the Federal Register. ### Retrieve document specifics For any given rule or notice, you pull out all its unique metadata, official links, and full details. ### Audit policy patterns You ask your agent to look for trends across multiple agencies or over a time period to map regulatory reach. ## Use Cases ### Verifying compliance for a client A regulatory lead needs to know if their industry is affected by new federal mandates. They prompt the agent: 'Search for documents about carbon emissions in 2024.' The agent uses 'search_federal_documents' and provides relevant rules from multiple agencies, allowing the lead to immediately assess compliance risks. ### Tracking a legislative history A policy analyst is tracking how a specific law evolved. They first use 'list_federal_agencies' to confirm all players and then repeatedly call 'get_federal_document_details' for document numbers over several years, building an accurate timeline of regulatory change. ### Investigating agency scope creep A journalist wants to know if a niche area is being regulated. They ask the agent to 'List all US government agencies that publish rules.' The resulting list shows which bodies have jurisdiction, helping them focus their investigation. ### Checking operational readiness An operations team needs to ensure their research pipeline is working before a major report deadline. They quickly run the 'check_api_status' tool and confirm the service is fully operational, preventing last-minute workflow failures. ## Benefits - Stop cross-referencing multiple government websites. Using the 'list_federal_agencies' tool gives you one place to see every agency that publishes rules, making oversight much faster. - Need to prove a rule was published? The 'get_federal_document_details' tool pulls precise publication dates and unique identifiers for flawless citations and audits. - Instead of reading through endless PDFs, the 'search_federal_documents' tool finds exactly what you need—whether it’s about environmental standards or local zoning rules—based on natural language prompts. - It saves hours of manual work. By letting your agent handle the querying, you bypass the tedious process of building complex search forms and filters across multiple government portals. - You get actionable metadata straight into your workflow. The API doesn't just give text; it provides structure, links, and dates that legal teams actually need. ## How It Works The bottom line is that you get verifiable, structured access to complex government data without writing a single query or visiting any government website. 1. First, you subscribe to this MCP on Vinkius and connect it to your AI client. 2. Next, you prompt your agent with a research query, like 'Show me all recent rules concerning energy.' 3. Your agent runs the necessary lookups using the available tools and returns structured data containing document titles, agencies, and official links. ## Frequently Asked Questions **Does the Federal Register API MCP include state-level regulations?** No, this MCP is limited strictly to federal rules and notices published in the official United States Federal Register. It does not cover state or local ordinances. **What if I only have a document title and no number?** If you know the approximate date, use 'search_federal_documents' with keywords and dates to narrow down your search. Providing more detail always helps the agent find the right record. **Is an API key required for the Federal Register API MCP?** No API Key is needed. The Federal Register itself is a free, public service, so you can connect your AI client without managing credentials. **How do I find out which agencies publish rules?** Just call the 'list_federal_agencies' tool. It provides an instant list of every US government body that publishes in the Federal Register, letting you scope your research immediately. **Can the Federal Register API MCP track historical changes?** Yes, by combining 'search_federal_documents' with specific date ranges and then using 'get_federal_document_details', you can build a precise timeline of regulatory evolution.