Department of Homeland Security

OpenFEMA API

The OpenFEMA API is FEMA's public RESTful service that exposes more than 70 datasets including disaster declarations, public assistance funded projects, individual assistance grants, hazard mitigation, and housing assistance program data. The API is free, requires no API key, and supports OData-style query string parameters for filtering, sorting, pagination, and field selection. Default page size is 1,000 records up to a maximum of 10,000.

GitHub OpenAPI

Documentation

📖
Documentation
https://www.fema.gov/about/openfema/api

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/department-of-homeland-security/refs/heads/main/openapi/department-of-homeland-security-openapi.yml

Other Resources

🔗
Developer Resources
https://www.fema.gov/about/openfema/developer-resources
🔗
Datasets
https://www.fema.gov/about/openfema/data-sets
🔗
ChangeLog
https://www.fema.gov/about/openfema/changelog

OpenAPI Specification

department-of-homeland-security-openapi.yml Raw ↑ 
openapi: 3.1.0
info:
  title: OpenFEMA API
  description: >-
    The OpenFEMA API (FEMA, U.S. Department of Homeland Security) provides
    public, read-only access to disaster, mitigation, and assistance datasets.
    All endpoints support common OpenFEMA query parameters including $filter,
    $select, $orderby, $top, $skip, $inlinecount, and $format.
  version: "2"
x-generated-from: https://www.fema.gov/about/openfema/api
x-generated-by: claude-crawl-2026-05-08
servers:
  - url: https://www.fema.gov/api/open
    description: OpenFEMA API
paths:
  /v2/DisasterDeclarationsSummaries:
    get:
      summary: Disaster Declarations Summaries
      description: Federally declared disasters from 1953 forward.
      operationId: listDisasterDeclarationsSummaries
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Select'
        - $ref: '#/components/parameters/OrderBy'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/InlineCount'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v2/FemaWebDisasterSummaries:
    get:
      summary: FEMA Web Disaster Summaries
      description: High-level summary information for declared disasters.
      operationId: listFemaWebDisasterSummaries
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v2/HazardMitigationGrants:
    get:
      summary: Hazard Mitigation Grants
      description: Hazard Mitigation Grant Program project funding records.
      operationId: listHazardMitigationGrants
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v1/HousingAssistanceOwners:
    get:
      summary: Housing Assistance to Owners
      description: Individual assistance housing data for homeowners.
      operationId: listHousingAssistanceOwners
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v1/HousingAssistanceRenters:
    get:
      summary: Housing Assistance to Renters
      description: Individual assistance housing data for renters.
      operationId: listHousingAssistanceRenters
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v1/IndividualsAndHouseholdsProgramValidRegistrations:
    get:
      summary: IHP Valid Registrations
      description: Applicant-level Individuals and Households Program registrations.
      operationId: listIHPValidRegistrations
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v1/PublicAssistanceFundedProjectsDetails:
    get:
      summary: Public Assistance Funded Project Details
      description: Project worksheet details for Public Assistance grants.
      operationId: listPublicAssistanceFundedProjectsDetails
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v1/PublicAssistanceApplicants:
    get:
      summary: Public Assistance Applicants
      description: Applicant-level summary records for Public Assistance grants.
      operationId: listPublicAssistanceApplicants
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v1/MissionAssignments:
    get:
      summary: Mission Assignments
      description: Federal agency mission assignments issued by FEMA.
      operationId: listMissionAssignments
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v1/EmergencyManagementPerformanceGrants:
    get:
      summary: Emergency Management Performance Grants
      description: State and local emergency preparedness grant recipients.
      operationId: listEmergencyManagementPerformanceGrants
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v2/FemaRegions:
    get:
      summary: FEMA Regions
      description: FEMA regional headquarters and geographic boundaries.
      operationId: listFemaRegions
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v1/FimaNfipClaims:
    get:
      summary: NFIP Claims
      description: National Flood Insurance Program claim transactions.
      operationId: listFimaNfipClaims
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v2/FimaNfipPolicies:
    get:
      summary: NFIP Policies
      description: National Flood Insurance Program policy transactions.
      operationId: listFimaNfipPolicies
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
  /v3/HazardMitigationAssistanceProjects:
    get:
      summary: Hazard Mitigation Assistance Projects
      description: HMA project applications and awards.
      operationId: listHazardMitigationAssistanceProjects
      parameters:
        - $ref: '#/components/parameters/Filter'
        - $ref: '#/components/parameters/Top'
        - $ref: '#/components/parameters/Skip'
        - $ref: '#/components/parameters/Format'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
components:
  parameters:
    Filter:
      name: $filter
      in: query
      schema:
        type: string
      description: OData filter expression.
    Select:
      name: $select
      in: query
      schema:
        type: string
      description: Comma-separated list of fields to return.
    OrderBy:
      name: $orderby
      in: query
      schema:
        type: string
      description: Sort expression.
    Top:
      name: $top
      in: query
      schema:
        type: integer
      description: Maximum records to return per page.
    Skip:
      name: $skip
      in: query
      schema:
        type: integer
      description: Records to skip for pagination.
    InlineCount:
      name: $inlinecount
      in: query
      schema:
        type: string
        enum: [allpages, none]
      description: Include total record count.
    Format:
      name: $format
      in: query
      schema:
        type: string
        enum: [json, csv, jsona, geojson]
      description: Response format.
  schemas:
    DatasetResponse:
      type: object
      additionalProperties: true
      properties:
        metadata:
          type: object
          additionalProperties: true