> ## Documentation Index > Fetch the complete documentation index at: https://docs.interchange.io/llms.txt > Use this file to discover all available pages before exploring further. # List fee invoices > The org's IU fee invoices, newest first — one per charged billing cycle, with gapless sequential numbering. Empty until the org's first charged cycle closes. ## OpenAPI ````yaml /v2/storefront-api-v2.yaml get /billing/fee-invoices openapi: 3.0.0 info: title: Scope3 Storefront API version: 2.0.0 description: |- REST API for partners to manage storefronts, inventory sources, and billing. ## Authentication All endpoints require a Bearer token in the Authorization header: ``` Authorization: Bearer your-api-key ``` ## Base URL `https://api.interchange.io/api/v2/storefront` ## For AI Agents AI agents can use the MCP endpoint at `/mcp/v2/storefront` with three tools: - `initialize`: Start an MCP session - `api_call`: Make REST API calls - `ask_about_capability`: Learn about API features servers: - url: https://api.interchange.io/api/v2/storefront description: Production server security: [] tags: - name: Account description: Account management, service tokens, and preferences - name: Storefront description: Manage storefront and inventory sources - name: Storefront Agents description: List and manage registered sales, signals, and outcomes agents - name: Storefront Activity description: Audit log of configuration and inventory changes on the storefront - name: Storefront Billing description: Payout bank details and billing configuration for storefronts - name: AI Usage description: Storefront AI token usage visibility by model - name: MCP description: Model Context Protocol endpoints paths: /billing/fee-invoices: servers: - url: https://api.interchange.io/api/v2 description: Production server get: tags: - Buyer Billing summary: List fee invoices description: >- The org's IU fee invoices, newest first — one per charged billing cycle, with gapless sequential numbering. Empty until the org's first charged cycle closes. operationId: listFeeInvoices responses: '200': description: List fee invoices content: application/json: schema: $ref: '#/components/schemas/FeeInvoiceListResponse' '400': description: Bad request content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - bearerAuth: [] components: schemas: FeeInvoiceListResponse: description: >- Fee invoices for the caller’s org, newest first. Empty until the org’s first charged billing cycle closes. type: object properties: invoices: type: array items: $ref: '#/components/schemas/FeeInvoiceSummary' required: - invoices additionalProperties: false ErrorResponse: description: Standard error response type: object properties: data: type: string nullable: true enum: - null error: $ref: '#/components/schemas/ApiError' required: - data - error additionalProperties: false FeeInvoiceSummary: description: >- One fee invoice, without its lines — the list-view shape. Fetch the invoice by number for line detail. type: object properties: invoiceNumber: description: Gapless sequential invoice number (platform-wide series) type: integer minimum: -9007199254740991 maximum: 9007199254740991 invoiceRef: description: Display reference for the invoice (e.g. "FEE-000042") example: FEE-000042 type: string cycleKey: description: The billing cycle the invoice covers (e.g. "2026-07") example: 2026-07 type: string cycleStart: description: Cycle start (ISO 8601, UTC calendar month) type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ cycleEnd: description: Cycle end, exclusive (ISO 8601) type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ currency: description: ISO 4217 currency code example: USD type: string minLength: 3 maxLength: 3 pattern: ^[A-Z]{3}$ totalMinor: description: >- Outstanding balance in minor units: amounts owed minus payments applied. 0 once fully settled. type: integer minimum: -9007199254740991 maximum: 9007199254740991 issuedAt: description: When the invoice was issued (ISO 8601) type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ paidAt: description: >- When the balance reached zero (ISO 8601), or null while any amount is outstanding nullable: true type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ required: - invoiceNumber - invoiceRef - cycleKey - cycleStart - cycleEnd - currency - totalMinor - issuedAt - paidAt additionalProperties: false ApiError: description: Structured error object type: object properties: code: description: Machine-readable error code type: string message: description: Human-readable error message type: string field: description: Field path associated with the error type: string details: description: Additional error context type: object additionalProperties: {} required: - code - message additionalProperties: false securitySchemes: bearerAuth: type: http scheme: bearer description: API key or access token ````