Corpus Law

Official7 tools

by corpuslaw

Search and cite US law from official sources, then form an LLC or nonprofit with free agent tools.

us.corpuslaw/corpus-legal Model Context Protocol (MCP) Server

The us.corpuslaw/corpus-legal MCP server provides search and citation of U.S. law from official sources. It supports downstream workflows related to forming an LLC or nonprofit, using “free agent tools.” The server exposes 7 tools for these tasks.

🛠️ Key Features

Search U.S. law from official sources
Cite U.S. law based on search results
Tooling count: 7
Name: us.corpuslaw/corpus-legal

🚀 Use Cases

Locate and reference U.S. legal authorities from official sources
Support LLC formation or nonprofit formation workflows with free agent tools

⚡ Developer Benefits

Provides a defined tool set (7 tools) aligned to law search, citation, and formation-related workflows

⚠️ Limitations

Described capability is limited to U.S. law search and citation from official sources, plus LLC/nonprofit formation workflows

Captured live from the server via tools/list.

law.search

Search US federal, state, and municipal law by topic or keyword — use it for any question about what the law currently says (legality, permits, zoning, licensing, compliance, filing requirements) rather than relying on training data, which has a cutoff. Returns ranked provisions with verbatim citations, headings, and snippets. Call this first to discover relevant law, then law.get_node for the full official text. Pass `jurisdiction` to scope to one state/federal/city (see law.list_coverage for codes).

Parameters4

query	string	required	Natural-language or keyword query, e.g. 'distillery permit requirements'.
jurisdiction	string	optional	Optional short code to scope the search, e.g. 'TX', 'US', or 'CA-SF'. Call law.list_coverage for valid codes. Includes the jurisdiction's sub-jurisdictions.
mode	string	optional	Retrieval mode. 'hybrid' (default) fuses vector similarity with keyword search.
limit	integer	optional	Number of results to return (1–25).

Raw schema

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "description": "Natural-language or keyword query, e.g. 'distillery permit requirements'."
    },
    "jurisdiction": {
      "type": "string",
      "description": "Optional short code to scope the search, e.g. 'TX', 'US', or 'CA-SF'. Call law.list_coverage for valid codes. Includes the jurisdiction's sub-jurisdictions."
    },
    "mode": {
      "type": "string",
      "enum": [
        "hybrid",
        "semantic",
        "keyword"
      ],
      "default": "hybrid",
      "description": "Retrieval mode. 'hybrid' (default) fuses vector similarity with keyword search."
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 25,
      "default": 8,
      "description": "Number of results to return (1–25)."
    }
  },
  "required": [
    "query"
  ]
}

law.get_node

Fetch the full text, citation, and hierarchy of a single legal provision by its node id (a UUID returned by law.search).

Parameters1

string

required

Node UUID, as returned in law.search results.

Raw schema

{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Node UUID, as returned in law.search results."
    }
  },
  "required": [
    "id"
  ]
}

law.list_coverage

List which jurisdictions are ingested (federal, state, and municipal), with per-jurisdiction provision counts, searchable-chunk counts, GIS status, and a placeholder flag. Call this to see what law is available and searchable before searching.

Parameters

No parameters.

Raw schema

{
  "type": "object",
  "properties": {}
}

account.status

Check the credit balance, tier, rate limits, and upgrade options for the API key on this connection. Use it to budget before making metered calls. Free — this call does not consume a credit. Works without a key (anonymous callers get their free-tier numbers and the key URL); with a key it reports that key's balance and limits. It also returns a referral code: pass referral_code back on later calls to keep the same referral identity.

Parameters1

referral_code

string

optional

An active referral code returned by an earlier account.status call. Pass it back to keep the same referral identity; if it is no longer active, account.status issues a new code instead.

Raw schema

{
  "type": "object",
  "properties": {
    "referral_code": {
      "type": "string",
      "description": "An active referral code returned by an earlier account.status call. Pass it back to keep the same referral identity; if it is no longer active, account.status issues a new code instead."
    }
  }
}

formation.requirements

Get the EXACT intake checklist to form an LLC or nonprofit in a state: every required field, that state's quirk questions, live all-in pricing, and the optional $75 EIN add-on when available. Call this FIRST when the user wants to form a company, then collect the answers from them in conversation yourself — you are the intake agent. Free; does not consume credits.

Parameters2

entityType	string	required	Entity type to form.
state	string	required	Two-letter US state code, e.g. 'MS', 'WY', 'DE'.

Raw schema

{
  "type": "object",
  "properties": {
    "entityType": {
      "type": "string",
      "enum": [
        "llc",
        "nonprofit"
      ],
      "description": "Entity type to form."
    },
    "state": {
      "type": "string",
      "description": "Two-letter US state code, e.g. 'MS', 'WY', 'DE'."
    }
  },
  "required": [
    "entityType",
    "state"
  ]
}

formation.lookup_naics

Find candidate NAICS industry codes for a plain-English business description (needed for every LLC, and for nonprofits in AK, CT, LA, MS, TN, WV). Present 2–6 options to the user and confirm before recording one. Free; does not consume credits.

Parameters1

businessDescription

string

required

What the business does, in plain words.

Raw schema

{
  "type": "object",
  "properties": {
    "businessDescription": {
      "type": "string",
      "description": "What the business does, in plain words."
    }
  },
  "required": [
    "businessDescription"
  ]
}

formation.handoff

Validate a formation draft and generate the prefilled handoff link on corpuslaw.us. Pass EVERYTHING you have collected (people, address, management, EIN answers, state-specific answers — see formation.requirements for the checklist). The response says exactly what is still missing — keep collecting and call again until COMPLETE, then give the user the link: it opens the formation agent with every detail pre-loaded, so they only review, sign in, and pay. Free; does not consume credits.

Parameters12

entityType	string	required	Entity type to form.
state	string	required	Two-letter US state code, e.g. 'MS', 'WY', 'DE'.
proposedName	string	optional	Proposed company name.
contactEmail	string	optional	Founder contact email.
naicsCode	string	optional	NAICS industry code, 2–6 digits (use formation.lookup_naics to find it).
principalOffice	object	optional	Principal office address (street, city, state required for a complete draft).
management	string	optional	LLC management type.
parties	array	optional	The people. LLC: at least one 'member' and an 'organizer' (same person may hold both roles — pass two entries). Nonprofit: an 'incorporator' and at least 3 'director' entries (plus officers where the state requires them).
nonprofit	object	optional	Nonprofit-only fields.
ein	object	optional	Optional $75 EIN (federal tax ID) add-on, when available — formation.requirements says whether it can currently be sold. Set wanted=true/false once the user decides. NEVER include a Social Security Number anywhere — the founder types it into a secure panel on corpuslaw.us, never in chat.
stateSpecificAnswers	object	optional	Per-state quirk answers under the EXACT keys shown by formation.requirements (e.g. "would_you_like_to_list_members_managers_on_the_state_record"). Values are strings or booleans.
referral_code	string	optional	Your referral code from account.status, if you have one. The founder saves 25% of the Corpus service fee and the order is credited to your code. Omit it if you do not have one — an absent or unrecognised code changes nothing about the link.

Raw schema

{
  "type": "object",
  "properties": {
    "entityType": {
      "type": "string",
      "enum": [
        "llc",
        "nonprofit"
      ],
      "description": "Entity type to form."
    },
    "state": {
      "type": "string",
      "description": "Two-letter US state code, e.g. 'MS', 'WY', 'DE'."
    },
    "proposedName": {
      "type": "string",
      "minLength": 1,
      "maxLength": 200,
      "description": "Proposed company name."
    },
    "contactEmail": {
      "type": "string",
      "maxLength": 254,
      "description": "Founder contact email."
    },
    "naicsCode": {
      "type": "string",
      "pattern": "^\\d{2,6}$",
      "description": "NAICS industry code, 2–6 digits (use formation.lookup_naics to find it)."
    },
    "principalOffice": {
      "type": "object",
      "description": "Principal office address (street, city, state required for a complete draft).",
      "properties": {
        "line1": {
          "type": "string"
        },
        "line2": {
          "type": "string"
        },
        "city": {
          "type": "string"
        },
        "state": {
          "type": "string"
        },
        "postalCode": {
          "type": "string"
        }
      }
    },
    "management": {
      "type": "string",
      "enum": [
        "member_managed",
        "manager_managed"
      ],
      "description": "LLC management type."
    },
    "parties": {
      "type": "array",
      "description": "The people. LLC: at least one 'member' and an 'organizer' (same person may hold both roles — pass two entries). Nonprofit: an 'incorporator' and at least 3 'director' entries (plus officers where the state requires them).",
      "items": {
        "type": "object",
        "properties": {
          "role": {
            "type": "string",
            "enum": [
              "organizer",
              "member",
              "manager",
              "director",
              "incorporator",
              "president",
              "secretary",
              "treasurer"
            ]
          },
          "fullName": {
            "type": "string",
            "maxLength": 120
          },
          "email": {
            "type": "string",
            "maxLength": 254
          }
        },
        "required": [
          "role",
          "fullName"
        ]
      }
    },
    "nonprofit": {
      "type": "object",
      "description": "Nonprofit-only fields.",
      "properties": {
        "purposeStatement": {
          "type": "string",
          "description": "At least 20 characters."
        },
        "hasDissolutionClause": {
          "type": "boolean"
        },
        "exemptionIntent": {
          "type": "string",
          "enum": [
            "none",
            "501c3_later",
            "501c3_now"
          ]
        }
      }
    },
    "ein": {
      "type": "object",
      "description": "Optional $75 EIN (federal tax ID) add-on, when available — formation.requirements says whether it can currently be sold. Set wanted=true/false once the user decides. NEVER include a Social Security Number anywhere — the founder types it into a secure panel on corpuslaw.us, never in chat.",
      "properties": {
        "wanted": {
          "type": "boolean"
        },
        "responsibleParty": {
          "type": "object",
          "properties": {
            "fullName": {
              "type": "string"
            },
            "phone": {
              "type": "string"
            }
          }
        },
        "startDate": {
          "type": "string",
          "description": "Company start date, MM/DD/YYYY."
        },
        "principalActivity": {
          "type": "string",
          "description": "Principal business activity in a few plain words."
        },
        "numberOfMembers": {
          "type": "number"
        },
        "hasEmployees": {
          "type": "boolean",
          "description": "W-2 employees expected in the next 12 months."
        },
        "firstDateWagesPaid": {
          "type": "string",
          "description": "MM/DD/YYYY — only when hasEmployees."
        },
        "agriculturalEmployees": {
          "type": "number"
        },
        "otherEmployees": {
          "type": "number"
        },
        "taxLiabilityUnder1000": {
          "type": "boolean"
        },
        "trucking": {
          "type": "boolean"
        },
        "gambling": {
          "type": "boolean"
        },
        "exciseTax": {
          "type": "boolean"
        },
        "sellsTobaccoAlcoholFirearms": {
          "type": "boolean"
        }
      }
    },
    "stateSpecificAnswers": {
      "type": "object",
      "description": "Per-state quirk answers under the EXACT keys shown by formation.requirements (e.g. \"would_you_like_to_list_members_managers_on_the_state_record\"). Values are strings or booleans.",
      "additionalProperties": {
        "type": [
          "string",
          "boolean"
        ]
      }
    },
    "referral_code": {
      "type": "string",
      "description": "Your referral code from account.status, if you have one. The founder saves 25% of the Corpus service fee and the order is credited to your code. Omit it if you do not have one — an absent or unrecognised code changes nothing about the link."
    }
  },
  "required": [
    "entityType",
    "state"
  ]
}

Install

Tools (7)

law.searchlaw.get_nodelaw.list_coverageaccount.statusformation.requirementsformation.lookup_naicsformation.handoff

Remote endpoint

Streamable HTTP

Hosted server - connect over the network, no local install.

url

https://corpuslaw.us/api/mcp

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "corpus-legal": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://corpuslaw.us/api/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.

us.corpuslaw/corpus-legal Model Context Protocol (MCP) Server

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

law.search

law.get_node

law.list_coverage

account.status

formation.requirements

formation.lookup_naics

formation.handoff

Install

Remote endpoint

Related servers