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Federal Register API and MCP server

No authfederal-register

Search official federal rules, proposed rules, notices, and agency documents relevant to housing, finance, land, infrastructure, and environmental due diligence.

Federal Register is published by Federal Register.

How often the publisher refreshes it is not declared, so treat the timing of any field as unknown.

Last verified . That is when these facts were last rebuilt from the ParcelOps source registry, not when Federal Register last refreshed the data itself.

lawrulemakingpropertyhousingfederal

API access

Your AI client reaches Federal Register through one ParcelOps MCP endpoint, so there is no separate key to hold for it and no per-source client to write. Reaching it takes no credentials of your own.

Set up Federal Register in Claude, ChatGPT, or CursorGet every fact on this page as JSON

Where it came from

PublisherFederal Register
API basehttps://www.federalregister.gov/api/v1

Freshness and coverage

FreshnessFreshness not declared
Places coveredNot declared
Time coveredNot declared
CredentialsNo credentials required

What this source cannot tell you

  • ⚠ Where it stops geographically, because the covered area is not declared. An empty answer will not tell you whether the place is out of range or the record is simply missing.
  • ⚠ Which years it spans, because the covered period is not declared.
  • ⚠ How current a field is, because the refresh schedule is not declared.
  • ⚠ Anything Federal Register does not publish. ParcelOps returns this source as it stands and never fills a blank field from a different one.

Methods (4)

A method is one call your agent can make against this source.

  • searchDocuments

    read

    Search Documents

    Input schema
    {
  "type": "object",
  "properties": {
    "term": {
      "type": "string",
      "maxLength": 300
    },
    "agency": {
      "oneOf": [
        {
          "type": "string",
          "maxLength": 120
        },
        {
          "type": "array",
          "maxItems": 20,
          "items": {
            "type": "string",
            "maxLength": 120
          }
        }
      ]
    },
    "type": {
      "oneOf": [
        {
          "type": "string",
          "maxLength": 40
        },
        {
          "type": "array",
          "maxItems": 10,
          "items": {
            "type": "string",
            "maxLength": 40
          }
        }
      ]
    },
    "publicationDateStart": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
    },
    "publicationDateEnd": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
    },
    "perPage": {
      "type": "integer",
      "minimum": 1,
      "maximum": 1000
    },
    "page": {
      "type": "integer",
      "minimum": 1,
      "maximum": 10000
    },
    "order": {
      "type": "string",
      "enum": [
        "newest",
        "oldest",
        "relevance"
      ]
    }
  },
  "required": [],
  "additionalProperties": false
}

  • getDocument

    read

    Get Document

    What you must providedocumentNumber
    Input schema
    {
  "type": "object",
  "properties": {
    "documentNumber": {
      "type": "string",
      "maxLength": 80
    }
  },
  "required": [
    "documentNumber"
  ],
  "additionalProperties": false
}

  • listAgencies

    read

    List Agencies

    Input schema
    {
  "type": "object",
  "properties": {},
  "required": [],
  "additionalProperties": false
}

  • getServiceInfo

    read

    Get Service Info

    Input schema
    {
  "type": "object",
  "properties": {},
  "required": [],
  "additionalProperties": false
}

Where this source is used