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OpenAPI Specification

openapi: 3.2.0
info:
  title: AI2Fin Financial Management Receipts & Attachments API
  description: Financial management platform with AI-powered categorization, tax optimization, and bill management.
  version: 1.0.0
  contact:
    name: AI2Fin Support
    url: https://ai2fin.com
  license:
    name: Proprietary
servers:
- url: https://api.ai2fin.com
  description: Production
- url: http://localhost:3001
  description: Local Development
security:
- bearerAuth: []
- cookieAuth: []
tags:
- name: Receipts & Attachments
  description: Receipt ingestion, AI analysis, and linkage APIs
paths:
  /api/receipts/analyze:
    post:
      tags:
      - Receipts & Attachments
      summary: Analyze receipt asset
      description: Extract structured data from an uploaded receipt or invoice
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - assetUrl
              - mimeType
              - size
              properties:
                assetUrl:
                  type: string
                mimeType:
                  type: string
                size:
                  type: integer
                sha256:
                  type: string
      responses:
        '200':
          description: Receipt analyzed
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  data:
                    $ref: '#/components/schemas/ReceiptAnalysis'
      operationId: postApiReceiptsAnalyze
      x-operation-id-source: derived
  /api/receipts/commit:
    post:
      tags:
      - Receipts & Attachments
      summary: Commit receipt
      description: Link an analyzed receipt to an existing entity or create a new expense
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - assetUrl
              - mimeType
              - size
              - action
              properties:
                assetUrl:
                  type: string
                mimeType:
                  type: string
                size:
                  type: integer
                extracted:
                  $ref: '#/components/schemas/ReceiptExtractedData'
                action:
                  type: object
                  required:
                  - type
                  properties:
                    type:
                      type: string
                      enum:
                      - link
                      - create_expense
                    transactionId:
                      type: string
                    updateFields:
                      type: object
      responses:
        '200':
          description: Receipt committed
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  data:
                    type: object
                    properties:
                      entityType:
                        type: string
                      entityId:
                        type: string
      operationId: postApiReceiptsCommit
      x-operation-id-source: derived
components:
  schemas:
    ReceiptExtractedData:
      type: object
      properties:
        merchant:
          type: string
        dateISO:
          type: string
          format: date
        currency:
          type: string
        total:
          type: number
        tax:
          type: number
        tip:
          type: number
        lineItems:
          type: array
          items:
            type: object
            properties:
              description:
                type: string
              quantity:
                type: number
              unitPrice:
                type: number
              amount:
                type: number
    ReceiptAnalysis:
      type: object
      properties:
        extracted:
          $ref: '#/components/schemas/ReceiptExtractedData'
        candidates:
          type: array
          items:
            type: object
            properties:
              id:
                type: string
              date:
                type: string
                format: date
              amount:
                type: number
        asset:
          type: object
          properties:
            assetUrl:
              type: string
            mimeType:
              type: string
            size:
              type: integer
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: First-party access token for your own signed-in session, obtained from the /api/enterprise-auth/login endpoint. The REST API returns your own account data to you — it is a first-party consumer surface, not a third-party integration channel. Data from connected bank feeds (open-banking / CDR data) is your own data, returned only to you in your own authenticated session.
    cookieAuth:
      type: apiKey
      in: cookie
      name: ai2_sess
      description: Session cookie for web applications
    apiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: 'API key for the MCP Inspector endpoint (/mcp/inspector) only. Generate your own key via /api/api-keys. Format: mcp_<64 hex characters>. API keys carry mcp:* scopes and authenticate MCP Inspector operations — they are not accepted on the REST API (/api/...) or the main MCP endpoint (/mcp), which use OAuth bearer tokens.'