Navan Fees and Adjustments API

openapi: 3.2.0
info:
  title: Navan Bookings Fees and Adjustments API
  description: 'The Navan API is the public developer surface for the Navan (formerly TripActions) corporate travel, expense, and corporate card platform. It is a REST/HTTPS API secured with OAuth 2.0 using the client-credentials grant. Administrators generate a client_id / client_secret in the Navan app under Settings > Integrations (API), exchange them for a Bearer access token, and call the API with `Authorization: Bearer <token>`. Access is scoped (e.g. bookings:read, users:read, users:write, users:delete, and the expense read/write scopes).


    Endpoint status: the Expense API paths (transactions, fees, adjustments, receipts, custom fields) and the travel/v1 Users paths are CONFIRMED against Navan''s published API reference and third-party integration guides. The Bookings and Webhook subscription-management paths are MODELED - the relevant scopes and capabilities are documented by Navan, but the exact request paths are behind a gated reference and are represented here as a best-effort model. Modeled operations are flagged with `x-endpoint-status: modeled`.'
  version: '1.0'
  contact:
    name: Navan Developers
    url: https://developer.navan.com/
  x-rebrand-note: Navan was known as TripActions until its February 2022 rebrand to Navan; some legacy hostnames and token paths still carry a `ta-` (TripActions) prefix, e.g. the `ta-auth` OAuth token path.
servers:
- url: https://api.navan.com
  description: Navan API (US / global)
security:
- oauth2ClientCredentials: []
tags:
- name: Fees and Adjustments
  description: Fees, credit/debit adjustments, daily rebates, and disputes. CONFIRMED.
paths:
  /v1/expense/fees:
    get:
      operationId: listFees
      tags:
      - Fees and Adjustments
      summary: List fees
      description: Retrieve direct-reimbursement, FX, and platform fees. CONFIRMED.
      parameters:
      - $ref: '#/components/parameters/FromDate'
      - $ref: '#/components/parameters/ToDate'
      responses:
        '200':
          description: A page of fees.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionList'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /v1/expense/adjustments:
    get:
      operationId: listAdjustments
      tags:
      - Fees and Adjustments
      summary: List adjustments
      description: Retrieve credit and debit memo adjustments. CONFIRMED.
      parameters:
      - $ref: '#/components/parameters/FromDate'
      - $ref: '#/components/parameters/ToDate'
      responses:
        '200':
          description: A page of adjustments.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionList'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /v1/expense/daily-rebates:
    get:
      operationId: listDailyRebates
      tags:
      - Fees and Adjustments
      summary: List daily rebates
      description: Retrieve daily rebate transactions. CONFIRMED.
      parameters:
      - $ref: '#/components/parameters/FromDate'
      - $ref: '#/components/parameters/ToDate'
      responses:
        '200':
          description: A page of daily rebates.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionList'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /v1/expense/disputes:
    get:
      operationId: listDisputes
      tags:
      - Fees and Adjustments
      summary: List disputes
      description: Retrieve dispute transactions. CONFIRMED.
      parameters:
      - $ref: '#/components/parameters/FromDate'
      - $ref: '#/components/parameters/ToDate'
      responses:
        '200':
          description: A page of disputes.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionList'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  parameters:
    FromDate:
      name: from
      in: query
      required: false
      description: Start of the date range filter (ISO 8601).
      schema:
        type: string
        format: date-time
    ToDate:
      name: to
      in: query
      required: false
      description: End of the date range filter (ISO 8601).
      schema:
        type: string
        format: date-time
  schemas:
    TransactionList:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/Transaction'
        next_cursor:
          type:
          - string
          - 'null'
    Transaction:
      type: object
      properties:
        id:
          type: string
        type:
          type: string
          description: The transaction type (card, connect, manual, repayment, fee, adjustment, rebate, dispute).
        status:
          type: string
        merchant:
          type: string
        amount:
          type: number
        currency:
          type: string
        date:
          type: string
          format: date-time
        userId:
          type: string
        customFieldValues:
          type: object
          additionalProperties: true
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
            message:
              type: string
            details:
              type: object
              additionalProperties: true
  responses:
    Unauthorized:
      description: Missing or invalid access token, or insufficient scope.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    oauth2ClientCredentials:
      type: oauth2
      description: 'OAuth 2.0 client-credentials flow. Generate a client_id / client_secret in the Navan app under Settings > Integrations (API), then POST grant_type=client_credentials to the token URL to obtain a Bearer access token. US token URL: https://app.navan.com/ta-auth/oauth/token ; EU token URL: https://app-fra.navan.com/ta-auth/oauth/token . (Some integrations reference an https://api.navan.com/ta-auth/oauth/token or /auth/v1/token variant; confirm the current token URL in the Navan developer portal.)'
      flows:
        clientCredentials:
          tokenUrl: https://app.navan.com/ta-auth/oauth/token
          scopes:
            bookings:read: Read booking (trip) data.
            users:read: Read user profiles.
            users:write: Create and modify users.
            users:delete: Deactivate users.
            liquid:read: Read expense data (transactions, fees, receipts, custom fields).
            liquid:write: Update expense data.