U.S. Treasury Fiscal Data National Debt API

openapi: 3.0.3
info:
  title: Treasury Fiscal Data Exchange Rates National Debt API
  description: The U.S. Treasury Fiscal Data API provides free, open access to federal financial data including national debt, interest rates, exchange rates, and detailed fiscal operations data. No authentication or API key is required. The API uses RESTful principles, accepts GET requests, and returns JSON responses with standardized pagination, filtering, sorting, and field selection across 80+ endpoints covering all major Treasury financial reports.
  version: '1.0'
  contact:
    name: Bureau of the Fiscal Service
    url: https://fiscaldata.treasury.gov/
    email: FiscalDataHelp@fiscal.treasury.gov
  license:
    name: Public Domain (U.S. Government Work)
    url: https://fiscaldata.treasury.gov/about-us/
  x-generated-from: documentation
servers:
- url: https://api.fiscaldata.treasury.gov/services/api/fiscal_service
  description: Treasury Fiscal Data API
tags:
- name: National Debt
  description: Federal debt, public debt outstanding, and interest rate data.
paths:
  /v2/accounting/od/debt_to_penny:
    get:
      operationId: getDebtToPenny
      summary: Treasury Fiscal Data Get Debt to the Penny
      description: Retrieve daily public debt outstanding data including total public debt, debt held by the public, and intragovernmental holdings. Data is updated daily when federal markets are open. The dataset begins January 1993 with approximately 8,000 records.
      tags:
      - National Debt
      parameters:
      - $ref: '#/components/parameters/fields'
      - $ref: '#/components/parameters/filter'
      - $ref: '#/components/parameters/sort'
      - $ref: '#/components/parameters/pageNumber'
      - $ref: '#/components/parameters/pageSize'
      - $ref: '#/components/parameters/format'
      responses:
        '200':
          description: Successful response with debt data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DebtToPennyResponse'
              examples:
                GetDebtToPenny200Example:
                  summary: Default getDebtToPenny 200 response
                  x-microcks-default: true
                  value:
                    data:
                    - record_date: '2026-04-30'
                      tot_pub_debt_out_amt: '38967833861543.11'
                      debt_held_public_amt: '31272489865435.88'
                      intragov_hold_amt: '7695343996107.23'
                    meta:
                      count: 1
                      labels:
                        record_date: Record Date
                        tot_pub_debt_out_amt: Total Public Debt Outstanding
                        debt_held_public_amt: Debt Held by the Public
                        intragov_hold_amt: Intragovernmental Holdings
                      total-count: 8298
                      total-pages: 8298
                    links:
                      self: '&page%5Bnumber%5D=1&page%5Bsize%5D=1'
                      first: '&page%5Bnumber%5D=1&page%5Bsize%5D=1'
                      prev: null
                      next: '&page%5Bnumber%5D=2&page%5Bsize%5D=1'
                      last: '&page%5Bnumber%5D=8298&page%5Bsize%5D=1'
        '400':
          description: Bad request. Invalid parameters.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /v2/accounting/od/avg_interest_rates:
    get:
      operationId: getAvgInterestRates
      summary: Treasury Fiscal Data Get Average Interest Rates on U.S. Treasury Securities
      description: Retrieve average interest rates on various U.S. Treasury securities including Treasury bills, notes, bonds, TIPS, and total marketable and non-marketable securities. Data is published monthly.
      tags:
      - National Debt
      parameters:
      - $ref: '#/components/parameters/fields'
      - $ref: '#/components/parameters/filter'
      - $ref: '#/components/parameters/sort'
      - $ref: '#/components/parameters/pageNumber'
      - $ref: '#/components/parameters/pageSize'
      - $ref: '#/components/parameters/format'
      responses:
        '200':
          description: Successful response with interest rate data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InterestRateResponse'
              examples:
                GetAvgInterestRates200Example:
                  summary: Default getAvgInterestRates 200 response
                  x-microcks-default: true
                  value:
                    data:
                    - security_desc: Treasury Bills
                      avg_interest_rate_amt: '3.702'
                      record_date: '2026-03-31'
                    meta:
                      count: 1
                      total-count: 4929
                      total-pages: 4929
                    links:
                      self: '&page%5Bnumber%5D=1&page%5Bsize%5D=1'
        '400':
          description: Bad request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /v2/accounting/od/interest_expense:
    get:
      operationId: getInterestExpenseDebt
      summary: Treasury Fiscal Data Get Interest Expense on the Debt Outstanding
      description: Retrieve monthly interest expense incurred on the federal debt, broken down by debt category (debt held by public, intragovernmental debt).
      tags:
      - National Debt
      parameters:
      - $ref: '#/components/parameters/fields'
      - $ref: '#/components/parameters/filter'
      - $ref: '#/components/parameters/sort'
      - $ref: '#/components/parameters/pageNumber'
      - $ref: '#/components/parameters/pageSize'
      - $ref: '#/components/parameters/format'
      responses:
        '200':
          description: Successful response with interest expense data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GenericFiscalResponse'
              examples:
                GetInterestExpenseDebt200Example:
                  summary: Default getInterestExpenseDebt 200 response
                  x-microcks-default: true
                  value:
                    data:
                    - record_date: '2026-03-31'
                      expense_categ_desc: Debt Held by the Public
                      gross_interest_expense_amt: '87000000000.00'
                      net_interest_expense_amt: '85000000000.00'
                    meta:
                      count: 1
                      total-count: 3600
                      total-pages: 3600
                    links:
                      self: '&page%5Bnumber%5D=1&page%5Bsize%5D=1'
        '400':
          description: Bad request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /v1/accounting/od/gift_contributions:
    get:
      operationId: getGiftContributionsDebt
      summary: Treasury Fiscal Data Get Gift Contributions to Reduce the Public Debt
      description: Retrieve data on voluntary contributions made to the U.S. Treasury to help reduce the public debt. Records individual and organizational gifts received since 1996.
      tags:
      - National Debt
      parameters:
      - $ref: '#/components/parameters/fields'
      - $ref: '#/components/parameters/filter'
      - $ref: '#/components/parameters/sort'
      - $ref: '#/components/parameters/pageNumber'
      - $ref: '#/components/parameters/pageSize'
      - $ref: '#/components/parameters/format'
      responses:
        '200':
          description: Successful response with gift contribution data.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GenericFiscalResponse'
              examples:
                GetGiftContributionsDebt200Example:
                  summary: Default getGiftContributionsDebt 200 response
                  x-microcks-default: true
                  value:
                    data:
                    - contribution_fiscal_yr: '2026'
                      contribution_month: '03'
                      number_of_contributions: 45
                      total_contributions_amt: '185000.00'
                      record_date: '2026-03-31'
                    meta:
                      count: 1
                      total-count: 360
                      total-pages: 360
                    links:
                      self: '&page%5Bnumber%5D=1&page%5Bsize%5D=1'
        '400':
          description: Bad request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  parameters:
    fields:
      name: fields
      in: query
      required: false
      description: Comma-separated list of field names to include in the response. Use to limit output to specific columns (e.g., fields=record_date,tot_pub_debt_out_amt).
      schema:
        type: string
        example: record_date,tot_pub_debt_out_amt,debt_held_public_amt
    filter:
      name: filter
      in: query
      required: false
      description: 'Filter criteria using format field:operator:value. Multiple filters separated by commas. Operators: eq (equals), lt (less than), lte (less than or equal), gt (greater than), gte (greater than or equal), in (in list). Example: filter=record_date:gte:2025-01-01,record_date:lte:2025-12-31'
      schema:
        type: string
        example: record_date:gte:2025-01-01,record_date:lte:2025-12-31
    format:
      name: format
      in: query
      required: false
      description: 'Response format. Options: json (default), csv, xml.'
      schema:
        type: string
        enum:
        - json
        - csv
        - xml
        default: json
        example: json
    pageSize:
      name: page[size]
      in: query
      required: false
      description: Number of records per page (max 10000).
      schema:
        type: integer
        minimum: 1
        maximum: 10000
        default: 100
        example: 100
    sort:
      name: sort
      in: query
      required: false
      description: 'Comma-separated list of field names to sort by. Prefix with minus (-) for descending order. Example: sort=-record_date,security_desc'
      schema:
        type: string
        example: -record_date
    pageNumber:
      name: page[number]
      in: query
      required: false
      description: Page number for pagination (1-based).
      schema:
        type: integer
        minimum: 1
        default: 1
        example: 1
  schemas:
    InterestRateResponse:
      title: InterestRateResponse
      type: object
      description: Response from the Average Interest Rates endpoint.
      properties:
        data:
          type: array
          description: Array of interest rate records.
          items:
            $ref: '#/components/schemas/InterestRateRecord'
        meta:
          $ref: '#/components/schemas/FiscalMeta'
        links:
          $ref: '#/components/schemas/FiscalLinks'
    FiscalLinks:
      title: FiscalLinks
      type: object
      description: Pagination links for navigating result pages.
      properties:
        self:
          type: string
          description: URL parameters for the current page.
          example: '&page%5Bnumber%5D=1&page%5Bsize%5D=100'
        first:
          type: string
          description: URL parameters for the first page.
          example: '&page%5Bnumber%5D=1&page%5Bsize%5D=100'
        prev:
          type: string
          nullable: true
          description: URL parameters for the previous page (null if on first page).
          example: null
        next:
          type: string
          nullable: true
          description: URL parameters for the next page (null if on last page).
          example: '&page%5Bnumber%5D=2&page%5Bsize%5D=100'
        last:
          type: string
          description: URL parameters for the last page.
          example: '&page%5Bnumber%5D=83&page%5Bsize%5D=100'
    DebtToPennyResponse:
      title: DebtToPennyResponse
      type: object
      description: Response from the Debt to the Penny endpoint.
      properties:
        data:
          type: array
          description: Array of debt records.
          items:
            $ref: '#/components/schemas/DebtRecord'
        meta:
          $ref: '#/components/schemas/FiscalMeta'
        links:
          $ref: '#/components/schemas/FiscalLinks'
    FiscalMeta:
      title: FiscalMeta
      type: object
      description: Metadata included in all Treasury Fiscal Data API responses.
      properties:
        count:
          type: integer
          description: Number of records in this response page.
          example: 100
        labels:
          type: object
          description: Human-readable labels for each field in the data.
          additionalProperties:
            type: string
          example:
            record_date: Record Date
            tot_pub_debt_out_amt: Total Public Debt Outstanding
        dataTypes:
          type: object
          description: Data type for each field (DATE, STRING, CURRENCY, NUMBER, PERCENTAGE).
          additionalProperties:
            type: string
          example:
            record_date: DATE
            tot_pub_debt_out_amt: CURRENCY
        dataFormats:
          type: object
          description: Display format for each field.
          additionalProperties:
            type: string
          example:
            record_date: YYYY-MM-DD
        total-count:
          type: integer
          description: Total number of records matching the query.
          example: 8298
        total-pages:
          type: integer
          description: Total number of pages available.
          example: 83
    ErrorResponse:
      title: ErrorResponse
      type: object
      description: Error response from the Treasury Fiscal Data API.
      properties:
        error:
          type: string
          description: Error code.
          example: Bad Request
        message:
          type: string
          description: Detailed error message.
          example: Invalid filter parameter syntax.
        status:
          type: integer
          description: HTTP status code.
          example: 400
    GenericFiscalResponse:
      title: GenericFiscalResponse
      type: object
      description: Generic Treasury Fiscal Data API response for datasets not covered by specific schemas.
      properties:
        data:
          type: array
          description: Array of data records. Fields vary by dataset.
          items:
            type: object
            additionalProperties: true
        meta:
          $ref: '#/components/schemas/FiscalMeta'
        links:
          $ref: '#/components/schemas/FiscalLinks'
    InterestRateRecord:
      title: InterestRateRecord
      type: object
      description: A single interest rate record for a Treasury security type.
      properties:
        security_desc:
          type: string
          description: Description of the Treasury security type.
          example: Treasury Bills
        security_type_desc:
          type: string
          description: Broader security type (Marketable or Nonmarketable).
          example: Marketable
        avg_interest_rate_amt:
          type: string
          description: Average interest rate as a percentage.
          example: '3.702'
        record_date:
          type: string
          format: date
          description: Record date in YYYY-MM-DD format.
          example: '2026-03-31'
    DebtRecord:
      title: DebtRecord
      type: object
      description: A single record from the Debt to the Penny dataset.
      properties:
        record_date:
          type: string
          format: date
          description: Date of the debt calculation in YYYY-MM-DD format.
          example: '2026-04-30'
        tot_pub_debt_out_amt:
          type: string
          description: Total public debt outstanding in U.S. dollars.
          example: '38967833861543.11'
        debt_held_public_amt:
          type: string
          description: Portion of debt held by the public in U.S. dollars.
          example: '31272489865435.88'
        intragov_hold_amt:
          type: string
          description: Intragovernmental holdings in U.S. dollars.
          example: '7695343996107.23'
        src_line_nbr:
          type: string
          description: Source line number.
          example: '1'
        record_fiscal_year:
          type: string
          description: Federal fiscal year of the record.
          example: '2026'
        record_fiscal_quarter:
          type: string
          description: Federal fiscal quarter of the record.
          example: Q2
        record_calendar_year:
          type: string
          description: Calendar year of the record.
          example: '2026'
        record_calendar_quarter:
          type: string
          description: Calendar quarter of the record.
          example: Q2
        record_calendar_month:
          type: string
          description: Calendar month of the record.
          example: '04'
        record_calendar_day:
          type: string
          description: Calendar day of the record.
          example: '30'