> ## Documentation Index > Fetch the complete documentation index at: https://docs.singapay.id/llms.txt > Use this file to discover all available pages before exploring further. # Prepaid Inquiry (v2) > Perform a prepaid product inquiry. Supports PLN Token (plntok) and Game Topup (topupg). Returns product details and a reference number for subsequent payment. ## OpenAPI ````yaml https://biller-b2b.singapay.id/docs post /api/v2/prepaid/inquiry openapi: 3.0.0 info: title: B2B Biller API description: >- API documentation for the B2B Biller service. Provides endpoints for bill payments (postpaid/prepaid), transaction management, balance checking, and authentication. version: 1.0.0 servers: - url: https://sandbox-biller-b2b.singapay.id description: Sandbox - url: https://biller-b2b.singapay.id description: Production security: [] tags: - name: Authentication description: OAuth2 token generation - name: General description: Bill transaction listing, detail, balance, and utilities - name: Postpaid V1 description: Postpaid bill inquiry and payment (V1) - name: Prepaid V1 description: Prepaid inquiry and payment — PLN Token, Pulsa, Paket Data (V1) - name: Postpaid V2 description: Postpaid bill inquiry and payment (V2) - name: Prepaid V2 description: Prepaid inquiry, payment, and game topup (V2) paths: /api/v2/prepaid/inquiry: post: tags: - Prepaid V2 summary: Prepaid Inquiry (v2) description: >- Perform a prepaid product inquiry. Supports PLN Token (plntok) and Game Topup (topupg). Returns product details and a reference number for subsequent payment. operationId: prepaidInquiryV2 parameters: - name: X-PARTNER-ID in: header description: Your unique partner API key required: true schema: type: string - name: Accept in: header required: true schema: type: string default: application/json - name: Content-Type in: header required: true schema: type: string default: application/json requestBody: required: true content: application/json: schema: required: - command - data properties: command: description: Product category code type: string enum: - plntok - topupg example: plntok data: required: - customer_id - product_code properties: customer_id: description: Customer/meter ID or game user ID type: string example: '14012345678' product_code: description: Product code (must exist in products table) type: string example: SPPLNTOK server_id: description: >- Game server ID (required for topupg, get from get-parameter-game-topup) type: string nullable: true username: description: Game username (for topupg) type: string nullable: true platform: description: Platform (for topupg, defaults to "android") type: string example: android nullable: true type: object type: object examples: PLN Token: summary: PLN Token (Prepaid Electricity) Inquiry value: command: plntok data: customer_id: '14012345678' product_code: SPPLNTOK Game Topup: summary: Game Topup Inquiry (with server_id) value: command: topupg data: customer_id: '123456789' product_code: SPMLBB86DM server_id: '12345' username: player123 platform: android responses: '200': description: Inquiry successful content: application/json: schema: properties: command: type: string example: plntok response_code: type: string example: '00' response_text: type: string example: Inquiry success data: description: Inquiry result (structure varies by product category) properties: amount: type: string example: '50000' customer_name: type: string example: JOHN DOE customer_id: type: string example: '14012345678' reference_number: type: string example: SPPLNTOKRJBL0012345678901234567890 price: type: string example: '52500' created_at: type: string example: '2025-06-10 16:36:49' type: object type: object examples: PLN Token Success: summary: PLN Token inquiry success value: command: plntok response_code: '00' response_text: Inquiry success data: amount: '50000' customer_name: JOHN DOE customer_id: '14012345678' reference_number: SPPLNTOKRJBL0012345678901234567890 price: '52500' created_at: '2025-06-10 16:36:49' Game Topup Success: summary: Game Topup inquiry success value: command: topupg response_code: '00' response_text: Inquiry success data: amount: '28000' customer_name: player123 customer_id: '123456789' reference_number: SPMLBB86DMRJBL0096284584861749552900 price: '29500' created_at: '2025-06-10 16:40:12' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/UnauthorizedErrorResponse' '422': description: Validation error content: application/json: schema: $ref: '#/components/schemas/ValidationErrorResponse' '500': description: System error content: application/json: schema: properties: command: type: string example: plntok response_code: type: string example: '99' response_text: type: string example: System error, please try again type: object security: - bearerAuth: [] components: schemas: UnauthorizedErrorResponse: description: Unauthorized error response (HTTP 401) required: - status - success - error properties: status: type: integer example: 401 success: type: boolean example: false error: properties: code: type: integer example: 401 message: type: string example: Unauthorized merchant, please sign in type: object type: object ValidationErrorResponse: description: Validation error response (HTTP 422) required: - command - response_code - response_text - data properties: command: type: string example: detail-bill-transaction response_code: type: string example: '04' response_text: type: string example: Rejected Format Error data: description: Field-level error messages type: object example: data: The data field is required. data.transaction_id: The data.transaction id field is required. additionalProperties: type: string type: object securitySchemes: bearerAuth: type: http description: JWT Bearer token obtained from /api/v1.0/access-token/b2b bearerFormat: JWT scheme: bearer ````